Powder activated carbon (PAC) is activated carbon ground to a fine particle size — typically 80% passing 200 mesh (75 µm) or finer. Unlike granular activated carbon (GAC) that sits in a fixed bed, PAC is dosed directly into liquid streams, mixed, and then removed by settling or filtration.

PAC is the fastest and most flexible way to add activated carbon treatment to any process. No vessels, no plumbing changes — just dose and filter. This guide covers PAC types, specifications, applications, and how to source it for your operation.

PAC vs GAC: When to Use Which

Factor	PAC (Powder)	GAC (Granular)
Contact method	Dosed into liquid, mixed, filtered out	Liquid flows througha fixed carbon bed
Capital cost	Low — needs only a dosing system and existing clarifier/filter	High — needs adsorption vessels, piping, backwash system
Operating cost	Higher carbon consumption per volume treated	Lower carbon consumption (longer contact time, better utilization)
Best for	Intermittent dosing, seasonal events, emergencies, taste/odor control, decolorization	Continuous treatment, large volumes, trace contaminant polishing
Carbon reuse	Typically single- use (removed with sludge)	Can be reactivated and reused multiple times
Flexibility	High — adjust dose rate instantly based on conditions	Fixed — bed changeout needed to adjust capacity
Particle size	80%+ passing 200 mesh (75 µm)	8×30, 12×40, or similar mesh ranges

Rule of thumb: Use PAC when you need flexible, on-demand treatment without capital investment in adsorption vessels. Use GAC when you have continuous treatment needs and want lower long-term carbon costs through bed reactivation.

Types of Powder Activated Carbon

By Raw Material

Type	Matières premières	Key Characteristics	Typical Applications
Wood-based PAC	Sawdust, wood chips	High mesopore volume, excellent decolorization, lower density	Sugar refining, food/beverage decolorization, pharmaceutical purification
Coal-based PAC	Bituminous or lignite coal	Balanced micropore /mesopore, good all-round adsorption, cost-effective	Municipal water treatment, industrial wastewater, general purpose
Coconut shell PAC	Coconut shell	High micropore volume, high hardness (less relevant for powder), highest cost	Pharmaceutical, food-grade applications requiring high purity

For most industrial applications, wood-based PAC is the default choice. Its high mesopore volume makes it the best decolorizer, and it's produced through phosphoric acid activation which gives it naturally high mesopore content. Coal-based PAC is preferred for water treatment where broad-spectrum adsorption matters more than decolorization.

By Activation Method

• Chemical activation (phosphoric acid / ZnCl₂) — produces high-mesopore carbon, ideal for decolorization. Most wood-based PAC uses this method
• Steam activation — produces high-micropore carbon with broader pore distribution. Standard for coal-based and coconut shell PAC

Key PAC Specifications

Paramètres	What It Measures	Typical Spec Range	Why It Matters
Indice d'iode	Micropore adsorption capacity (ASTM D4607)	800–1200 mg/g	Higher = better for small molecule removal (taste, odor, solvents)
Bleu de méthylène number	Mesopore adsorption capacity	120–280 mg/g	Higher = better for decolorization (large color molecules adsorb in mesopores)
Particle size (passing 200 mesh)	Fineness	80–95%	Finer = faster adsorption kinetics but harder to filter out
Humidité	Water content	≤10%	You're paying for carbon, not water
Teneur en cendres	Inorganic mineral residue	3–15%	Lower ash = higher purity, critical for food/ pharma applications
pH	Acid or alkaline character	3–5 (acid-activated) or 8–11 (steam-activated)	Must match process pH requirements
Iron content	Fe contamination	<0.1% for food grade	High iron causes discoloration in some food processes

The two most important specs for PAC selection:

1. Methylene blue number — if your primary goal is decolorization (sugar, chemicals, beverages), this is the spec that matters most. Iodine number tells you about micropores, but color molecules need mesopores
2. Particle size distribution — finer PAC reacts faster but is harder to separate. Match the fineness to your filtration capability

PAC Applications and Selection Guide

Application	Recommended PAC Type	Key Spec	Typical Dose Rate
Municipal drinking water (taste/odor)	Coal-based or wood-based	Iodine ≥900 mg/g	5–30 mg/L
Décoloration du sucre	Wood-based (phosphoric acid activated)	MB ≥200 mg/g, low ash	0.1–0.5% by weight of sugar
Edible oil refining	Wood-based, acid-washed	MB ≥180 mg/g, low iron	0.5–2% by weight of oil
Pharmaceutique purification	Coconut shell or wood-based, food grade	Low ash, low iron, USP/EP grade	Process-specific
Industrial wastewater (COD/color)	Wood-based or coal-based	MB ≥150 mg/g, Iodine ≥800	50–500 mg/L
Chemical decolorization (glycerin, citric acid)	Wood-based	MB ≥220 mg/g	0.2–1% by weight
Emergency spill response	Any available PAC	Fine particle size for fast kinetics	Depends on contaminant

For specific guidance on PAC in water treatment, see our article on PAC for water treatment. For food industry decolorization, see our guides on décoloration du sucre and glycerin decolorization.

PAC Dosing and Handling

Dosing Methods

• Slurry dosing — PAC is mixed with water to form a 5–15% slurry, then metered into the process stream. Most common method for continuous dosing
• Dry dosing — PAC is fed directly from a hopper through a screw feeder or volumetric dispenser. Used for batch processes and when water addition is undesirable

Handling Precautions

• Dust control — PAC is extremely fine and creates airborne dust during handling. Use enclosed systems, dust collection, and wet unloading where possible
• Explosion risk — fine carbon dust in air is combustible. Keep dust concentrations below the lower explosive limit (LEL). Ground all equipment. No open flames or sparks near PAC storage and dosing areas
• Storage — store in dry, covered area. PAC absorbs moisture from air, which increases weight and can cause clumping. Keep bags sealed until use

PAC Packaging and Ordering

Packaging Option	Typical Weight	Best For
Paper bags (multi-layer kraft)	20–25 kg	Small to medium users, manual handling
Jumbo bags (FIBC)	500–1000 kg	Large users with forklift/crane unloading
Bulk (pneumatic tanker)	20+ tons	Very large continuous users (municipal water plants)

Huamei Carbon manufactures wood-based and coal-based powder activated carbon for water treatment, decolorization, chemical purification, and industrial wastewater applications. Available in 25 kg bags, jumbo bags, or bulk. Minimum order: 10 tons (one 20ft container).

📱 WhatsApp: +86 181-3792-7803
📧 Email: sale@huameicarbon.com
🌐 Website: www.huameicarbon.com

Questions fréquemment posées

What is the difference between powder activated carbon and granular activated carbon?

Powder activated carbon (PAC) has a particle size where 80%+ passes 200 mesh (75 µm). It's dosed directly into liquids, mixed, and removed by filtration. Granular activated carbon (GAC) has larger particles (typically 0.5–4 mm) and is used in fixed-bed adsorption vessels that liquid flows through. PAC is faster-acting but single-use; GAC is slower but reactivatable.

Which is better for decolorization — wood-based or coal-based PAC?

Wood-based PAC is better for decolorization in most cases. Its phosphoric acid activation process creates a high proportion of mesopores (2–50 nm), which is where large color molecules adsorb. Coal-based PAC has more micropores, making it better for small molecules like taste and odor compounds. For sugar, oil, and chemical decolorization, wood-based PAC with methylene blue number ≥200 mg/g is the industry standard.

How much powder activated carbon do I need per ton of product?

It varies by application and contaminant loading. For sugar decolorization: 0.1–0.5% by weight of sugar. For edible oil refining: 0.5–2% by weight of oil. For wastewater treatment: 50–500 mg/L depending on COD and color levels. The best approach is to run a bench-scale dosing trial — test increasing PAC doses on your actual product to find the minimum effective dose.

Is powder activated carbon safe for food processing?

Yes, when food-grade specifications are met. Food-grade PAC must have low ash (<5%), low iron (<0.1%), no heavy metal contamination, and meet regulatory requirements (FDA, EU, or local food contact standards). Wood-based and coconut shell PAC are most commonly used in food applications. Always request food-grade certification and COA from your supplier.

Can I reuse powder activated carbon?

Generally no. PAC is typically single-use — it's mixed into the process stream and removed with sludge or filter cake. The fine particle size makes it impractical to recover and reactivate. This is the main cost trade-off vs GAC: PAC has lower capital cost but higher ongoing carbon consumption. For processes with high carbon usage, consider switching to a GAC fixed-bed system for lower long-term cost.

Activated carbon is used in natural gas processing at multiple stages — from wellhead gas cleanup to pipeline-quality polishing. Each stage targets different contaminants and requires different carbon specifications.

This guide covers the main gas treatment applications, the carbon types and specs for each, and how to specify carbon for your gas processing project.

What Activated Carbon Removes from Gas Streams

Industrial gas treatment with activated carbon targets these contaminant groups:

Contaminant	Sources	Why It Must Be Removed	Carbon's Role
H₂S	Natural gas, biogas, syngas	Toxic, corrosive, poisons catalysts	Catalytic oxidation (impregnated carbon) or adsorption
Mercaptans (R-SH)	Natural gas, LPG	Odor, corrosion	Physical adsorption + catalytic oxidation
Mercury (Hg⁰)	Natural gas (0.01–5,000 µg/Nm³)	Poisons aluminum heat exchangers in LNG plants, environmental hazard	Chemisorption on sulfur-impregnated carbon
BTEX	Natural gas, associated gas	Contaminates glycol, causes emissions	Physical adsorption in micropores
Siloxanes	Biogas, landfill gas	Forms abrasive SiO₂ deposits in engines	Physical adsorption
COV	Process vents, tank emissions, fugitive sources	Emissions compliance, health hazard	Adsorption with optional thermal desorption

Natural Gas Processing Applications

1. Mercury Removal for LNG Production

Mercury in natural gas, even at trace levels (µg/Nm³), destroys the aluminum brazed heat exchangers used in LNG cryogenic processing. A single mercury excursion can cause liquid metal embrittlement that costs millions in repairs and months of downtime.

Sulfur-impregnated activated carbon is the standard mercury guard in LNG feed gas treatment. The sulfur reacts with elemental mercury to form mercuric sulfide (HgS), a stable and non-volatile compound trapped permanently in the carbon pores.

Spécifications :

• Carbon type: coal-based pellet (3–4 mm) or granular (4×10 mesh)
• Impregnation: elemental sulfur, 10–15% by weight
• Mercury capacity: 10–20% of carbon weight (theoretical); practical capacity depends on inlet concentration and contact time
• Operating temperature: 20–60°C
• EBCT: 5–15 seconds for guard beds
• Outlet target: <0.01 µg/Nm³ mercury

Mercury removal beds are non-regenerable — the carbon is replaced when capacity is exhausted. Bed life ranges from 3–10 years depending on inlet mercury levels.

2. H₂S and Mercaptan Removal

For natural gas with H₂S levels below 1,000 ppm, impregnated activated carbon provides a simpler alternative to amine systems. This is common for small-to-medium gas fields, marginal wells, and gas gathering stations where installing an amine plant isn't economical.

For a comprehensive guide to H₂S removal with activated carbon — including biogas, natural gas, and refinery applications — see our detailed article on activated carbon for sulfur removal.

Key specs for gas sweetening:

• Carbon type: coal-based pellet, 3–4 mm
• Impregnation: KOH (5–10%) for H₂S; virgin carbon or NaOH-impregnated for mercaptans
• H₂S capacity: 0.15–0.25 g/g (KOH) or 0.20–0.40 g/g (KI)
• Pressure: systems must be rated for pipeline operating pressure

3. BTEX Removal from Glycol Dehydration

Triethylene glycol (TEG) dehydration systems absorb BTEX along with water from natural gas. When the glycol is regenerated, BTEX is released — creating an emission source that may require control under environmental regulations.

An activated carbon bed on the glycol regeneration vent captures BTEX before it enters the atmosphere. The carbon can be thermally regenerated or replaced periodically.

Spécifications :

• Carbon type: coal-based granular, 4×10 or 8×30 mesh
• Surface area: ≥900 m²/g
• CTC activity: ≥50% (indicates good capacity for medium-weight hydrocarbons)
• Moisture resistance: low ash, hydrophobic surface preferred
• Regeneration: thermal (steam or hot nitrogen) at 150–200°C

4. VOC Emission Control

Gas processing plants, compressor stations, and storage facilities produce VOC emissions from process vents, tank breathing losses, and fugitive sources. Activated carbon adsorption is the standard control technology when:

• VOC concentrations are too low for thermal oxidation (below 25% LEL)
• The VOC stream is intermittent or variable
• Solvent recovery makes economic sense

Fixed-bed carbon adsorbers with two beds in alternating adsorption/regeneration cycles are the standard configuration. The regenerated VOCs can be recovered as liquid or routed to a flare.

Spécifications :

• Carbon type: coal-based pellet (3–4 mm) for low pressure drop, or granular (4×10) for higher capacity
• CTC activity: ≥60% (higher CTC = more VOC capacity per bed volume)
• Butane activity: ≥25% for general VOC applications
• Working capacity: depends on specific VOC and regeneration conditions
• Regeneration: steam at 120–150°C, or hot nitrogen

5. Biogas and Landfill Gas Upgrading

Biogas upgrading to biomethane (renewable natural gas) requires removal of H₂S, siloxanes, and VOCs before the gas enters membrane or PSA upgrading systems. Activated carbon handles all three contaminant groups, often in a multi-stage configuration:

• Stage 1: KOH-impregnated pellet carbon for bulk H₂S removal
• Stage 2: Virgin or specialty carbon for siloxane and VOC removal

For detailed biogas and landfill gas treatment specifications, see our sulfur removal guide.

Carbon Type Selection by Gas Treatment Application

Application	Target	Carbon Form	Imprégnation	Key Spec	Bed Life
LNG mercury guard	Hg⁰	Pellet 3–4 mm	Sulfur (10–15%)	Hg capacity, low pressure drop	3–10 years
Natural gas H₂S	H₂S	Pellet 3–4 mm	KOH or KI	H₂S cap ≥0.15 g/g	6–18 months
Mercaptan odor	R-SH	Granular 4×10	NaOH or virgin	Iodine ≥900	12–24 months
BTEX from glycol	BTEX	Granular 4×10	None	CTC ≥50%, SA ≥900	6–12 months (regenerable)
VOC emission control	Mixed VOCs	Pellet 3–4 mm	None	CTC ≥60%, butane ≥25%	3–5 years (regenerable)
Biogas H₂S	H₂S + siloxanes	Pellet 3–4 mm	KOH	CTC ≥60%, pH 9–11	6–12 months

How to Specify Activated Carbon for Gas Treatment

When sourcing carbon for gas treatment, provide your supplier with:

1. Gas composition — full analysis including target contaminants, moisture, CO₂, and hydrocarbon content
2. Flow rate and pressure — Nm³/hr and operating pressure (bar/psi)
3. Target outlet levels — what contaminant concentrations must you achieve?
4. Operating temperature — ambient or elevated?
5. Vessel constraints — if retrofitting existing equipment, the diameter and bed height are fixed
6. Regeneration capability — do you have steam or hot gas available for regeneration?

Huamei Carbon produces coal-based charbon actif en granulés for gas treatment applications, including H₂S removal, mercury guard beds, VOC control, and biogas upgrading. We offer virgin, KOH, KI, NaOH, and sulfur-impregnated grades in pellet diameters from 0.9 mm to 8 mm.

📱 WhatsApp: +86 181-3792-7803
📧 Email: sale@huameicarbon.com
🌐 Website: www.huameicarbon.com

Questions fréquemment posées

What type of activated carbon is used for gas purification?

Coal-based pellet activated carbon (3–4 mm diameter) is the standard for most gas purification applications. Pellet form provides low pressure drop and uniform gas distribution in fixed-bed vessels. For mercury removal, the carbon is impregnated with sulfur. For H₂S removal, KOH or KI impregnation is standard.

Can activated carbon remove mercury from natural gas?

Yes. Sulfur-impregnated activated carbon (10–15% sulfur loading) is the standard mercury guard bed in LNG and gas processing plants. Mercury reacts with sulfur to form stable HgS trapped in the carbon pores. These beds typically last 3–10 years and achieve outlet levels below 0.01 µg/Nm³.

How does activated carbon compare to iron sponge for gas treatment?

Iron sponge is cheaper per ton but has lower H₂S capacity per volume, creates pyrophoric waste, and can't handle mercaptans or other contaminants. Activated carbon — especially impregnated grades — has higher capacity, produces non-hazardous waste, and can be specified for multi-contaminant removal. For operations above 100 Nm³/hr, activated carbon typically has lower total cost of ownership.

How long does activated carbon last in gas treatment?

It depends on the application and contaminant loading. Mercury guard beds: 3–10 years. H₂S removal (KOH-impregnated): 6–18 months. VOC adsorbers with regeneration: 3–5 years. Biogas H₂S: 6–12 months. Higher inlet concentrations and higher flow rates shorten bed life.

Is pellet or granular activated carbon better for gas treatment?

Pellet carbon is generally preferred for gas-phase applications because the uniform cylindrical shape provides more predictable pressure drop and better gas distribution than irregularly-shaped crushed granular carbon. Pellet carbon also generates less dust during loading and operation. Granular carbon is used where higher surface area per volume is needed, such as BTEX guard beds on glycol systems.

Activated carbon is used across the petroleum refining process — from protecting amine systems to treating refinery wastewater. The specific carbon type, form, and specification depend on where in the refinery it's deployed and what it needs to remove.

This guide covers the main applications of activated carbon in petroleum refining, the specifications that matter for each, and how to source the right grades.

Where Activated Carbon Is Used in Petroleum Refining

A typical refinery uses activated carbon in at least four process areas:

Process Area	What Carbon Removes	Carbon Type	Typical Volume
Amine system guard bed	Surfactants, hydrocarbons, degradation products	Coal-based granular, 8×30 mesh	5–20 tons per charge
Produced water treatment	Oil, dissolved organics, BTEX, phenols	Granular or pellet, à base de charbon	10–50 tons per system
Naphtha and gasoline sweetening	Mercaptans, disulfides	Impregnated granular or pellet	2–10 tons per bed
Refinery wastewater	COD, BOD, oil & grease, phenols, PAHs	Granular (fixed bed) or powder (dosing)	Varies widely

1. Amine System Guard Beds

Amine-based gas treating systems (MEA, DEA, MDEA) remove H₂S and CO₂ from refinery gas streams. Over time, the amine solution picks up contaminants — surfactants from upstream processes, hydrocarbon condensates, heat-stable salts, and amine degradation products. These contaminants cause foaming, corrosion, and reduced treating capacity.

An activated carbon guard bed installed on the lean amine circulation loop adsorbs these contaminants before they accumulate to problem levels. This is one of the highest-value applications of activated carbon in a refinery — a $15,000–30,000 carbon charge can prevent millions of dollars in amine system downtime and replacement costs.

Spécifications :

• Carbon type: coal-based granular, 8×30 mesh (most common) or 12×40 mesh
• Iodine number: ≥900 mg/g
• Ash content: ≤8% (lower ash = less risk of introducing metals to the amine)
• Hardness: ≥90% (to resist attrition from liquid flow)
• Bed sizing: typically 10–20% of lean amine circulation rate, with 20–30 minute contact time
• Change-out frequency: every 6–12 months, depending on contamination level

Coal-based carbon is preferred over coconut shell for amine guard beds because its mesopore structure adsorbs the larger organic molecules (surfactants, heavy hydrocarbons) that cause foaming. Coconut shell's micropore-dominant structure is less effective for these larger molecules.

2. Produced Water and Oilfield Water Treatment

Produced water from oil and gas operations contains dissolved and dispersed hydrocarbons, BTEX (benzene, toluene, ethylbenzene, xylene), phenols, and other organic compounds. Regulatory discharge limits for oil and grease are typically 10–30 mg/L, and BTEX limits may be below 1 mg/L.

Activated carbon treats produced water either as a polishing step after oil-water separators and flotation, or in combination with other treatment technologies. For offshore platforms where space is limited, activated carbon's compact footprint is a significant advantage.

Spécifications :

• Carbon type: coal-based granular, 8×30 or 12×40 mesh
• Iodine number: ≥1000 mg/g (higher iodine for better organic removal)
• Oil adsorption capacity: this varies by carbon and isn't always listed on TDS — request oil uptake testing
• Attrition resistance: ≥95% (produced water often contains sand)
• Bed configuration: downflow fixed bed, backwash capability required
• Regeneration: thermal regeneration possible for large volumes; smaller systems use disposable carbon

3. Naphtha and Gasoline Sweetening

Mercaptans (R-SH) give petroleum products an unpleasant odor and contribute to equipment corrosion. The Merox process uses a fixed-bed of activated carbon impregnated with a caustic solution and a metal chelate catalyst to oxidize mercaptans to disulfides, which are then extracted.

Activated carbon's role here is dual: it serves as the catalyst support for the Merox reaction and adsorbs residual sulfur compounds. The carbon bed needs replacement when catalytic activity drops, typically every 2–5 years.

Spécifications :

• Carbon type: coal-based granular, 4×10 or 8×30 mesh
• Impregnation: caustic (NaOH) and metal chelate (cobalt or iron phthalocyanine) — usually done on-site or by the Merox licensee
• Surface area: ≥900 m²/g
• Ash: ≤6% (lower ash preferred to avoid catalyst poisoning)
• Mesopore volume: high (for efficient caustic distribution and mercaptan access)

4. Refinery Wastewater Treatment

Refinery wastewater contains a complex mix of hydrocarbons, phenols, sulfides, ammonia, and suspended solids. After primary separation and biological treatment, activated carbon serves as a tertiary polishing step to meet discharge limits — particularly for COD, phenol, and PAH (polycyclic aromatic hydrocarbon) concentrations.

Two approaches are common:

1. Granular activated carbon (GAC) fixed beds — for continuous flow treatment. Coal-based 8×30 or 12×40 mesh, sized for 10–20 minute EBCT. Standard for large refineries with dedicated wastewater plants
2. Powdered activated carbon (PAC) dosing — added directly to biological treatment basins (PACT process) to boost COD and phenol removal. Wood-based or coal-based PAC, 200–325 mesh. Effective for handling shock loads and seasonal variability

GAC specifications:

• Carbon type: coal-based granular, 8×30 or 12×40 mesh
• Iodine number: ≥950 mg/g
• Phenol adsorption: request phenol number testing if this is the primary target
• EBCT: 10–20 minutes for polishing; 20–30 minutes for primary treatment

PAC specifications:

• Carbon type: wood-based or coal-based powder, 200–325 mesh
• Methylene blue adsorption: ≥180 mg/g
• Dosing rate: 20–100 mg/L depending on influent COD

Other Petroleum Industry Applications

Beyond the four main areas, activated carbon is also used in refineries for:

• Hydrogen purification — PSA (pressure swing adsorption) systems use activated carbon as one of the adsorbent layers to remove heavier hydrocarbons before the molecular sieve layer
• Tank vent emission control — pellet carbon in vapor recovery units captures VOC emissions from storage tanks
• Lubricant purification — powdered activated carbon decolorizes and purifies base oils
• Glycol dehydration — carbon beds clean triethylene glycol (TEG) used in natural gas dehydration systems

Selecting Activated Carbon for Petroleum Applications

Application	Preferred Base	Form	Key Parameters	Why This Carbon
Amine guard bed	Coal-based	Granular 8×30	Iodine ≥900, ash ≤8%	Mesopores capture large surfactant molecules
Produced water	Coal-based	Granular 8×30 or 12×40	Iodine ≥1000, hardness ≥95%	High capacity for dissolved organics + BTEX
Merox sweetening	Coal-based	Granular 4×10 or 8×30	SA ≥900 m²/g, ash ≤6%	Mesopore structure for catalyst support
Wastewater GAC	Coal-based	Granular 8×30 or 12×40	Iodine ≥950	COD + phenol adsorption
Wastewater PAC	Wood or coal	Powder 200–325 mesh	MB ≥180 mg/g	Rapid contact in biological systems
Hydrogen PSA	Coal-based	Pellet 3–5 mm	High crush strength	Mesopore + low dust for PSA cycling

Pattern: coal-based activated carbon dominates petroleum applications. The mesopore-rich structure handles the large organic molecules common in refinery streams, and the mechanical hardness stands up to the pressures and flow rates in industrial vessels.

How to Order Activated Carbon for Petroleum Refining

When requesting a quote for refinery-grade activated carbon, provide:

1. Application — amine guard bed, produced water, wastewater, or other
2. Stream composition — what contaminants need to be removed, at what concentration
3. Flow rate — m³/hr or GPM
4. Vessel dimensions — if you have existing equipment
5. Current carbon spec — if you're replacing an existing charge, share the current TDS or product name
6. Volume and frequency — tons per charge, how often do you change out

Huamei Carbon supplies coal-based granular and charbon actif en granulés for petroleum refining applications. We've supplied amine guard bed carbon, produced water treatment carbon, and wastewater polishing carbon to refineries across the Middle East, Central Asia, and Southeast Asia — including 77 tons for MDEA purification in Kazakhstan.

📱 WhatsApp: +86 181-3792-7803
📧 Email: sale@huameicarbon.com
🌐 Website: www.huameicarbon.com

Questions fréquemment posées

What type of activated carbon is used in petroleum refining?

Coal-based granular activated carbon (8×30 or 12×40 mesh) is the standard for most refinery applications, including amine guard beds, produced water treatment, and wastewater polishing. Coal-based carbon's mesopore structure is better suited for adsorbing the large organic molecules common in refinery streams than coconut shell carbon.

How does activated carbon protect amine systems?

A carbon guard bed on the lean amine circulation loop adsorbs surfactants, hydrocarbon condensates, and amine degradation products that cause foaming and corrosion. The carbon is typically changed out every 6–12 months. This is one of the most cost-effective uses of activated carbon in a refinery.

Can activated carbon remove oil from produced water?

Yes. Granular activated carbon effectively removes dissolved hydrocarbons, BTEX, and phenols from produced water. It's typically used as a polishing step after oil-water separation and flotation. Coal-based GAC with iodine number ≥1000 mg/g and high attrition resistance is recommended.

How much activated carbon does a refinery use?

It varies widely by refinery size and configuration. A medium-sized refinery (100,000–200,000 BPD) might use 20–80 tons of activated carbon per year across amine guard beds, wastewater treatment, and other applications. Large integrated refineries with multiple amine trains and extensive wastewater treatment can use 100+ tons annually.

How often should activated carbon be replaced in refinery applications?

Amine guard beds: every 6–12 months. Produced water beds: every 6–18 months depending on oil loading. Wastewater GAC: every 12–24 months, or when effluent quality targets are no longer met. Merox beds: every 2–5 years. Regular monitoring of effluent quality tells you when it's time.

If you've requested quotes from multiple suppliers for coconut shell activated carbon, you've probably noticed the price gap can be enormous — sometimes 2x or more between the lowest and highest offer for what appears to be the same product.

That gap isn't random. It comes down to a handful of measurable variables that directly affect production cost, performance, and your total cost of ownership. This guide breaks down what actually drives coconut shell activated carbon pricing so you can evaluate quotes with confidence instead of just chasing the lowest number.

Coconut Shell Activated Carbon Price Range in 2026

Let's start with the numbers. FOB China pricing for coconut shell granular activated carbon in 2026:

Type de produit	Typical Application	FOB China Price (USD/ton)
Standard coconut shell GAC	Water treatment, récupération de l'or, gas phase	$3,000–3,800

That's the range, but a range this wide isn't very useful unless you understand what pushes the price toward one end or the other. The answer is almost always the same few variables.

What Determines Coconut Shell Activated Carbon Price

Here are the seven factors that have the biggest impact on your per-ton cost:

1. Iodine Number

Iodine number is the single biggest price driver. Higher iodine means more activation time in the kiln, lower yield from the same batch of coconut shell, and tighter quality control. The relationship is roughly linear up to about 1050 mg/g, then the curve gets steeper.

A basic 800-iodine grade for aquarium or simple filtration sits at the low end of the price range. A 1200+ iodine gold recovery grade with 98%+ hardness pushes toward the top. The difference? Yield loss. To push iodine above 1150 while maintaining high hardness, the activation process burns off more raw material. You start with more coconut shell to get less finished carbon.

2. Hardness and Abrasion Resistance

For water treatment, hardness above 95% is usually fine. For gold recovery, you need 98%+ because the carbon circulates through high-shear CIL/CIP circuits and any breakage means gold loss — literally. Achieving high iodine and high hardness simultaneously requires careful kiln control, which costs more.

If a supplier quotes you high-iodine carbon at a suspiciously low price, check the hardness spec. Odds are they've sacrificed hardness to hit the iodine target, and that tradeoff will cost you more in the field than you saved on procurement.

3. Acid Washing

Acid-washed (AW) grades go through an additional hydrochloric acid treatment to reduce ash content and lower pH. Acid-washed coconut shell carbon typically ranges from $1,850 to $3,100/ton FOB China, depending on the base grade. This processing is critical for:

• Drinking water applications requiring NSF/ANSI 61 compliance
• Food and pharmaceutical decolorization
• Any application sensitive to leachable metals

The price reflects the chemical cost, extra processing time, wastewater treatment from the acid rinse, and lower yield from the leaching step.

If your application doesn't require acid-washed carbon, don't pay for it. Standard grades work perfectly well for industrial wastewater, VOC treatment, and most gold recovery applications.

4. Particle Size (Mesh)

Common coconut shell granular sizes include 4×8, 6×12, 8×30, 12×40, and 20×50 mesh. The pricing impact comes from screening yield:

• 6×12 (gold recovery) — largest particles, highest screening yield from crushed coconut shell carbon. Generally the most cost-effective size to produce
• 12×40 (water treatment) — mid-range, good yield
• 8×30 — also common for water treatment, similar yield to 12×40
• 20×50 or finer — more fines generated during crushing, slightly lower yield, but the price difference is usually modest

The key point: particle size alone rarely drives more than a 5–10% price difference. If you're seeing huge gaps between mesh sizes from the same supplier, question why.

5. Coconut Shell Raw Material Source

Most coconut shell activated carbon sold globally is produced in Indonesia, Philippines, India/Sri Lanka, Vietnam, or China. The coconut shell feedstock quality varies by origin:

• Indonesia and Philippines — largest volume, generally good quality shells, competitive pricing
• India/Sri Lanka — established industry, strong in high-iodine grades
• Chine — imports coconut shells, but has advanced activation technology and strict QC systems. Our factory in Fujian sources shells and processes them with rotary kilns that allow precise temperature control

Raw shell prices fluctuate seasonally and with coconut oil market conditions (shell is a byproduct of copra/coconut oil production). When coconut oil prices spike, shell supply tightens and carbon prices follow.

6. Order Volume and Terms

Volume matters, but not as dramatically as you might think:

Order Size	Typical Impact
Trial order (10–13 tons / 1 × 20GP)	Standard pricing, MOQ level
One full container (26–28 tons / 1 × 40GP)	3–5% better than trial
Multi-container (50–100+ tons)	5–10% better, negotiable terms
Annual contract (200+ tons/year)	Best pricing, priority production scheduling

The biggest cost savings from volume aren't actually in the per-ton carbon price — they're in freight. Shipping 28 tons in one 40GP container costs far less per ton than shipping 13 tons in a 20GP. If your budget allows, maximizing container utilization is the easiest way to reduce your landed cost.

7. Freight and Incoterms

In 2026, ocean freight from China to major destinations varies significantly by route:

• East Africa (Dar es Salaam, Mombasa, Djibouti) — moderate rates, 25–35 day transit
• West Africa (Lagos, Tema) — higher rates, limited direct services
• Middle East (Jebel Ali, Jeddah) — competitive rates, fast transit
• Europe (Hamburg, Rotterdam) — moderate, well-served routes
• Americas (Houston, Santos) — longer transit, rates vary with fuel surcharges

When comparing quotes, always compare on the same Incoterm. An FOB China quote looks cheaper than a CIF quote, but once you add your own freight and insurance, the gap often narrows or reverses — especially if the supplier has better shipping rates than you can get independently.

The Hidden Cost of the Cheapest Quote

We've been in this industry long enough to see the pattern: a buyer picks the cheapest supplier, receives the carbon, and then discovers problems that cost far more than the savings.

Here are the most common traps:

Iodine Value Inflation

Some suppliers test a select portion of the batch and report the best result, or use non-standard testing methods that give higher readings. When you retest the bulk delivery at an independent lab using ASTM D4607, the number comes in 50–150 mg/g lower than the certificate claims.

At that point, you've already paid, the carbon is in your warehouse, and your options are limited.

What to do: Request pre-shipment third-party testing (SGS, Bureau Veritas, Intertek) on a composite sample from the actual production batch. A reputable supplier will agree to this without hesitation.

Hardness Shortfall

This one hurts most in gold recovery. Low-hardness carbon breaks down in the CIL circuit, generating fines that pass through screens and carry gold out of the system. A 2% drop in hardness can translate to measurable gold loss over months of operation.

The math is simple: if your plant processes 500,000 tons of ore per year at 2 g/t gold, and poor carbon hardness causes 0.5% more gold loss, that's real money walking out the door — far more than whatever you saved per ton on carbon.

High Ash Content

Ash doesn't adsorb anything. It's dead weight. High-ash carbon gives you less active surface area per kilogram, which means worse performance and more frequent carbon replacement. For applications like food-grade decolorization, high ash can also introduce unwanted minerals into your product.

Inconsistent Quality Between Batches

A factory that gives you great specs on the first order and mediocre specs on the third is worse than a factory that's consistently mid-range. Process stability matters more than peak performance on one test report.

How to Evaluate a Coconut Shell Carbon Supplier's Quote

When you receive a quote, here's what to check beyond the price per ton:

1. Full spec sheet with test method references — if the supplier doesn't specify ASTM/GB test methods, the numbers are hard to verify
2. Third-party test reports — SGS, BV, or Intertek reports from recent batches, not just in-house certificates
3. Sample availability — can you get a representative sample before committing to a bulk order?
4. Loading supervision — will they document the loading process with photos and video? This matters when you can't visit the factory
5. Reference customers — especially in your application area. A supplier strong in water treatment carbon may not be the best choice for gold recovery, and vice versa
6. Consistency track record — ask for test reports from 3–5 recent shipments to see if specs are stable

Why Factory-Direct Pricing Matters

The activated carbon supply chain from China typically has 2–3 layers: factory → trading company → distributor → end user. Each layer adds 10–15% markup without adding quality or accountability.

Buying direct from a manufacturer gives you:

• Transparent pricing — you know the price is based on actual production cost, not resale markup
• Direct QC communication — if you need a spec adjustment, you talk to the people running the kiln, not a middleman relaying messages
• Batch traceability — every bag can be traced back to a specific production run
• Faster response — order changes, urgent shipments, and technical questions get answered without telephone game delays

Our factory in Fujian and Ningxia provinces produces coconut shell, coal-based, and wood-based activated carbon with monthly capacity over 700 tons. We ship directly to clients in 40+ countries — no middlemen, no markup layers. Every shipment includes SGS-testable documentation and full loading supervision with photos and video.

Questions fréquemment posées

How much does coconut shell activated carbon cost per ton?

In 2026, FOB China pricing for coconut shell granular activated carbon ranges from $3,000 to $3,800 per ton for standard grades. Acid-washed grades range from $1,850 to $3,100 per ton. The exact price depends on your iodine requirement, mesh size, volume, and whether acid washing is needed.

Why is gold recovery carbon more expensive than water treatment carbon?

Gold recovery carbon requires higher iodine (typically 1050+), higher hardness (98%+), and tighter particle size control — all of which reduce production yield. The activation process runs longer, burns off more material, and requires more precise kiln control. You're paying for performance that directly affects gold recovery rates and carbon lifespan in CIL/CIP circuits.

Is acid-washed coconut shell carbon worth the extra cost?

Only if your application requires it. Drinking water filtration meeting NSF/ANSI 61, food-grade decolorization, and pharmaceutical applications generally need acid-washed carbon for low ash and neutral pH. For industrial wastewater, gold recovery, and gas-phase applications, standard (non-acid-washed) grades work well.

How can I verify that the specs on the certificate match the actual product?

Request pre-shipment composite sampling and independent lab testing. SGS, Bureau Veritas, and Intertek all offer activated carbon testing. A trustworthy supplier will welcome third-party verification — it removes doubt for both sides.

What's the minimum order quantity for coconut shell activated carbon from China?

Most manufacturers have an MOQ of 10 tons, which fills one 20-foot container. Some suppliers offer smaller quantities at a premium, but for the best per-ton price, ordering at least one full container (26–28 tons in a 40GP) is recommended.

Looking for a coconut shell activated carbon quote? Tell us your application, target specs, and volume — we'll send you pricing with a full spec sheet within 24 hours. No middlemen, factory-direct.

If you're running a biogas upgrading plant or landfill gas treatment system, there's a good chance your carbon spec says "Jacobi" somewhere on it. The AddSorb and EcoSorb series have become default specifications for biogas purification across European and North American markets — covering everything from bulk H₂S removal to siloxane polishing.

That position is based on real performance. Jacobi's biogas carbons are engineered for the specific contaminant mix in biogas streams — hydrogen sulfide, ammonia, siloxanes, and VOCs that damage CHP engines and contaminate upgraded biomethane.

But "engineered for biogas" also means "priced through a distributor network." If you're consuming 20–100+ tons of carbon per year, the question worth asking is: does an equivalent carbon exist at factory-direct pricing — and does it actually perform the same?

This article breaks down Jacobi's current biogas product line, what each grade actually does, and how Huamei's HME-AC™ pellet carbon and custom-impregnated carbons compare on the parameters that determine whether your biogas meets pipeline or engine specifications.

Jacobi's Current Biogas Product Portfolio

Jacobi organizes its biogas carbons into three product families, each targeting different contaminants. Here's the current lineup:

H₂S Removal — AddSorb Series

Jacobi Grade	Primary Target	Mechanism	Key Feature
AddSorb VA6-BG	H₂S	Catalytic oxidation (impregnated)	Standard biogas H₂S grade
AddSorb VA12-BG	H₂S (high concentration)	Catalytic oxidation (impregnated)	Higher sulfur loading capacity
AddSorb OX20	H₂S	Catalytic oxidation	Non-impregnated, oxygen-dependent
AddSorb OX30	H₂S	Catalytic oxidation	Higher capacity than OX20
AddSorb VA10	H₂S, mercaptans	Chemical + physical adsorption	Broader sulfur compound spectrum

NH₃ Removal — AddSorb VB1-BG

Jacobi Grade	Primary Target	Mechanism	Key Feature
AddSorb VB1-BG	NH₃, amines	Acid-impregnated (chemical reaction)	Purpose-built for alkaline gas removal in biogas

Siloxane & VOC Removal — EcoSorb / ReSorb Series

Jacobi Grade	Primary Target	Mechanism	Key Feature
EcoSorb BS	Siloxanes (D4, D5, L2)	Physical adsorption	Optimized pore structure for siloxane molecules
EcoSorb GXC	Siloxanes + VOCs	Physical adsorption	Broader spectrum, multi-contaminant
ReSorb VT	VOCs + trace siloxanes	Physical adsorption	Regenerable grade for thermal swing systems

The key insight: Jacobi doesn't use one carbon for everything. They split the job into specialized grades — impregnated carbons for reactive gases (H₂S, NH₃), virgin carbons for physical adsorption tasks (siloxanes, VOCs), and regenerable grades for systems with thermal swing capability. Your replacement strategy needs to respect these distinctions.

What Makes Biogas Carbon Different from Generic Carbon

Biogas purification isn't generic adsorption. The contaminant mix — H₂S, NH₃, siloxanes (D4, D5, L2), mercaptans, and halogenated compounds — demands specific carbon properties for each target:

H₂S removal operates through catalytic oxidation on the carbon surface. The carbon needs:

• Alkaline pH (>8) or specific chemical impregnation (KOH, NaOH, KI) to catalyze the H₂S → elemental sulfur reaction
• High mesopore volume for sulfur deposition capacity
• Sufficient oxygen availability in the gas stream (~2% O₂)

NH₃ removal requires the opposite chemistry — acid-impregnated carbon (typically phosphoric acid) that reacts with alkaline gases. Standard alkaline carbon does almost nothing for NH₃. This is why Jacobi has a separate grade (VB1-BG) rather than using their H₂S carbons for both.

Siloxane removal is primarily physical adsorption driven by:

• High surface area (siloxane molecules are larger than H₂S or NH₃)
• Mesopore-to-macropore ratio optimized for D4/D5 molecule size (~0.8–1.0 nm)
• Low moisture sensitivity (wet biogas streams reduce adsorption capacity)

The engineering reality: A single carbon grade cannot handle all three targets effectively. Most biogas plants run multi-stage systems with different carbons matched to each contaminant — and that's exactly what you should plan for when evaluating alternatives.

Huamei Alternatives: Grade-by-Grade Matching

Replacing Jacobi biogas carbons isn't one product swap — it's matching the right Huamei grade to each Jacobi grade's function. Here's the mapping based on contaminant target and mechanism:

H₂S Grades: AddSorb VA6-BG / VA12-BG / OX20 / OX30 / VA10

Paramètres	Jacobi AddSorb H₂S Grades (typical)	Huamei KOH-Impregnated Pellet	Huamei HME-AC™60 (Virgin)
Form	Extruded pellet	Extruded pellet	Extruded pellet
Diamètre	4mm	3mm or 4mm	4mm
Mechanism	Impregnated (VA6/VA12) or catalytic (OX series)	KOH-impregnated (chemical + physical)	Catalytic oxidation (physical only)
H₂S capacity	Published per grade	5–8× higher than virgin carbon	Standard catalytic capacity
CTC	50–60% (typical)	Varies with impregnant loading	60%

Replacement logic:

• For AddSorb VA6-BG, VA12-BG (impregnated H₂S grades): Replace with Huamei KOH-impregnated pellet carbon. These are chemically enhanced carbons — you need the same type of chemical impregnation, not just a high-CTC virgin carbon. Huamei produces custom KOH-impregnated grades with adjustable loading percentages.
• For AddSorb OX20, OX30 (non-impregnated catalytic grades): Replace with HME-AC™60 — virgin coal-based pellet with alkaline pH. These grades rely on the carbon's natural catalytic surface rather than added chemicals, so a virgin pellet with matching CTC and pH is the right equivalent.
• For AddSorb VA10 (mercaptans + H₂S): Discuss with Huamei — may require KI (potassium iodide) impregnation rather than KOH, depending on
  htmlyour mercaptan species.

NH₃ Grade: AddSorb VB1-BG

Paramètres	Jacobi AddSorb VB1-BG	Huamei H₃PO₄-Impregnated Pellet
Raw material	Coal-based	Coal-based (Ningxia anthracite)
Form	Extruded pellet	Extruded pellet
Diamètre	4mm	3mm or 4mm
Mechanism	Acid-impregnated (reacts with NH₃)	Phosphoric acid-impregnated (reacts with NH₃)
Target	NH₃, amines	NH₃, amines

Replacement logic: NH₃ removal requires acid-impregnated carbon — the chemistry is the opposite of H₂S removal. Do NOT use KOH-impregnated or standard alkaline carbon for NH₃; it won't work. Huamei produces phosphoric acid (H₃PO₄) impregnated pellet carbon specifically for alkaline gas treatment, which is the direct equivalent of VB1-BG.

Siloxane & VOC Grades: EcoSorb BS / EcoSorb GXC / ReSorb VT

Paramètres	Jacobi EcoSorb/ReSorb (typical)	Huamei HME-AC™70	Huamei HME-AC™80
Raw material	Coal-based / coconut shell	Coal-based (anthracite)	Coal-based (anthracite)
Form	Pellet or granular	Extruded pellet	Extruded pellet
Diamètre	4mm	4mm	4mm
Mechanism	Physical adsorption	Physical adsorption	Physical adsorption

Replacement logic:

• For EcoSorb BS (siloxane-focused): Replace with HME-AC™70 — CTC 70% provides the pore volume needed for D4/D5 siloxane molecules.
• For EcoSorb GXC (siloxane + VOC multi-contaminant): Replace with HME-AC™80 — higher CTC (80%) for broader-spectrum physical adsorption across both siloxanes and mixed VOCs.
• For ReSorb VT (regenerable): Both HME-AC™70 and HME-AC™80 support thermal regeneration. Confirm your regeneration temperature and method with Huamei to ensure compatibility.

Quick Reference: Jacobi → Huamei Replacement Table

Jacobi Grade	Target Contaminant	Huamei Equivalent	Key Matching Criteria
AddSorb VA6-BG	H₂S	KOH-impregnated pellet (custom)	Match impregnant type + loading %
AddSorb VA12-BG	H₂S (high conc.)	KOH-impregnated pellet (high loading)	Higher KOH loading for higher capacity
AddSorb OX20	H₂S	HME-AC™60	Virgin, alkaline pH, CTC ≥60%
AddSorb VA10	H₂S + mercaptans	KI-impregnated pellet (custom)	Discuss mercaptan species with Huamei
AddSorb VB1-BG	NH₃, amines	H₃PO₄-impregnated pellet	Acid impregnation required — NOT KOH
EcoSorb BS	Siloxanes	HME-AC™70	CTC 70%, pore structure for D4/D5
EcoSorb GXC	Siloxanes + VOCs	HME-AC™80	CTC 80%, broad-spectrum adsorption
ReSorb VT	VOCs (regenerable)	HME-AC™70 / HME-AC™80	Confirm regen temperature compatibility

Price and Supply

Factor	Jacobi AddSorb / EcoSorb	Huamei HME-AC™ / Impregnated
Pricing model	Distributor network	Factory-direct
Distribution layers	Manufacturer → Distributor → End user	Manufacturer → End user
MOQ (virgin pellet)	Varies (typically 5–10 tons via distributor)	3 tons
Échantillon	Through distributor	Free sample direct
COA	Yes	Yes (SGS available on request)
Custom impregnation	Limited to catalog grades	KOH, NaOH, H₃PO₄, KI — adjustable loading %

The structural price difference is distribution economics: Jacobi passes through intermediaries between factory and end user; Huamei ships direct. For a biogas plant consuming 40–100 tons/year across multiple grades, the annual cost difference funds comprehensive pilot testing in Year 1 — and delivers ongoing savings every year after.

Important Note: Impregnated Carbon Is Not Interchangeable

This deserves its own section because it's the most common mistake when switching biogas carbon suppliers.

You cannot replace impregnated carbon with virgin carbon. If your current Jacobi grade is AddSorb VA6-BG (KOH-impregnated for H₂S) or VB1-BG (acid-impregnated for NH₃), replacing it with a standard HME-AC™60 pellet will fail — the virgin carbon lacks the chemical reactivity needed for high-efficiency removal of reactive gases.

Conversely:

• KOH-impregnated carbon works for H₂S but NOT for NH₃ — both are alkaline, they won't react
• H₃PO₄-impregnated carbon works for NH₃ but NOT for H₂S — acid surface won't catalyze H₂S oxidation
• Virgin carbon works for siloxanes and VOCs — physical adsorption only, no impregnation needed (or wanted — impregnant occupies pore volume that should be available for physical adsorption)

When requesting quotes from Huamei, always specify:

1. Whether your current carbon is impregnated or virgin
2. If impregnated: what reagent and what loading percentage (ask your Jacobi rep if you don't have this)
3. Target contaminant and inlet concentration
4. Operating temperature and humidity

Huamei produces both KOH and H₃PO₄ impregnated carbons with adjustable loading — but they need your specific requirements to match the product correctly.

FAQ

What Jacobi activated carbon is used for biogas H₂S removal?

Jacobi offers several H₂S grades for biogas: AddSorb VA6-BG and VA12-BG (impregnated, high sulfur capacity), AddSorb OX20 and OX30 (non-impregnated catalytic), and AddSorb VA10 (H₂S plus mercaptans). The choice depends on H₂S inlet concentration, whether you need impregnated or catalytic removal, and bed design. For direct factory-sourced equivalents, Huamei's HME-AC™ pellet carbon (virgin catalytic) and custom KOH-impregnated pellets match these specifications.

Can I replace Jacobi AddSorb with a cheaper activated carbon for biogas?

Yes — if you match the mechanism, not just the format. For H₂S grades: impregnated Jacobi carbons (VA6-BG, VA12-BG) must be replaced with impregnated equivalents. For siloxane grades (EcoSorb BS, GXC): match CTC value and pore structure with high-CTC virgin pellet carbon like HME-AC™70 or HME-AC™80. Always run a pilot breakthrough test before committing to a full bed replacement.

What is the difference between AddSorb and EcoSorb from Jacobi?

AddSorb grades target reactive gases — H₂S (VA6-BG, VA12-BG, OX20, OX30, VA10) and NH₃ (VB1-BG) — using catalytic or chemical impregnation mechanisms. EcoSorb grades (BS, GXC) target siloxanes and VOCs using physical adsorption — they rely on pore structure rather than chemical treatment. ReSorb VT is the regenerable variant for thermal swing systems. They're different product families for different contaminant targets.

How much activated carbon does a biogas plant use per year?

Typical consumption ranges from 10–100+ tons/year depending on plant capacity, contaminant levels, and number of treatment stages. A 500 Nm³/hr biogas upgrading plant with 2,000 ppm H₂S inlet typically consumes 20–40 tons/year of H₂S-grade carbon. Siloxane polishing stages consume less (5–15 tons/year) but require more frequent replacement due to faster saturation.

Does Huamei make impregnated activated carbon for biogas?

Yes. Huamei produces custom-impregnated pellet activated carbon including KOH-impregnated (for H₂S/acid gases), NaOH-impregnated, H₃PO₄-impregnated (for NH₃/alkaline gases), and KI-impregnated (for mercaptans). Impregnant loading percentage is adjustable to match your target contaminant concentration. MOQ is 10 tons per impregnation type, with 28-day lead time including impregnation, curing, and QC.

Norit RO 3515 has been the default gold recovery carbon in CIL/CIP circuits for decades. If you've worked in gold mining in South Africa, West Africa, or Australia, chances are RO 3515 was the first carbon your plant loaded — and possibly the only one your metallurgist ever approved.

That market position was earned. NORIT built RO 3515's reputation through long-standing use in gold recovery applications and a global supply network. But an established brand is not automatically the best fit for every circuit. Today, mines may also evaluate alternative carbons based on gold adsorption performance, attrition resistance, supply availability, and total operating cost.

This article compares RO 3515 against HMGOLD™7500 from Huamei Carbon — spec by spec, using Norit's published product data and Huamei's SGS test results (Report No. MSRCZ2500346-01A). Where the numbers speak, we let them. Where they don't, we say what's missing.

Spec Sheet: Head-to-Head

Paramètres	Norit RO 3515	Huamei HMGOLD™7500	Notes
Raw material	Coconut shell	Coconut shell	Same
Activation	Steam	Steam	Same
Indice d'iode	≥1050 mg/g	1150 mg/g (spec) / 1208 mg/g (SGS actual)	✅ HMGOLD higher
Teneur en cendres	≤5%	2.52% (SGS)	✅ HMGOLD significantly lower
Humidité	≤5%	≤5%	Match
Ball-pan hardness	≥97% (ASTM D3802)	98.2% (GB/T method, SGS)	⚠️ Different test methods
K value (gold loading)	Not typically published	28 kg/t	HMGOLD published
R value (adsorption kinetics)	Not typically published	58%	HMGOLD published
Densité apparente	0.46–0.50 g/cm³	0.48–0.52 g/cm³	Comparable range
Taille des mailles	6×12	6×12, 8×16	HMGOLD offers more options
pH	Alkaline	10.0 (SGS)	Both alkaline

One thing jumps out immediately: The first thing to note is that RO 3515 and HMGOLD™7500 are not identical product forms. RO 3515 is an extruded activated carbon, while HMGOLD™7500 is a coconut-shell granular carbon. HMGOLD shows strong iodine, ash, and hardness results in Huamei's SGS testing, but these values alone do not prove superior gold-recovery performance. Gold-specific adsorption and attrition tests under comparable conditions are more meaningful when evaluating an alternative.Iodine is 100+ mg/g higher. Ash is half. The real question is whether those spec-sheet advantages translate to performance advantages in your specific circuit — and that requires testing, not assumptions.

Why RO 3515 Became the Default

Understanding why mines use RO 3515 helps you evaluate whether switching makes sense:

Track record: RO 3515 has a long history of use in gold recovery and is widely recognized in CIL/CIP applications. Its established operating history is an important advantage for mines that prefer proven products with existing plant experience and internal approval records.

Consistency: Norit's manufacturing process delivered batch-to-batch consistency that mines relied on. When you ordered RO 3515, you got RO 3515 — the carbon performed within predictable bounds every time.

Distribution reach: From Johannesburg to Perth to Accra, Norit distributors could deliver. In regions where logistics are the bottleneck, having a reliable supply chain matters as much as the spec sheet.

Inertia: This is the honest one. Many mines run RO 3515 because they've always run RO 3515. The metallurgist who approved it may have retired. The procurement team reorders on autopilot. Nobody has run a comparative trial in years — because why would you change something that works?

That last point is the opening for HMGOLD. "Works" and "optimal" are different things. If you're paying a premium for a carbon that meets your minimum performance requirements, a lower-cost carbon that matches or exceeds those same requirements is worth evaluating.

Where HMGOLD™7500 Has the Edge

Numéro d'iode

• Norit RO 3515: ≥1050 mg/g
• HMGOLD™7500: 1150 mg/g (spec) / 1208 mg/g (SGS actual)

Iodine number isn't the primary metric for gold recovery carbon — K value matters more. But a higher iodine number indicates greater total micropore volume, which correlates with overall adsorption capacity. At 1208 mg/g (SGS verified), HMGOLD™7500 has roughly 15% more adsorptive capacity than RO 3515's minimum specification.

For operations where carbon also handles organic fouling alongside gold adsorption — common in high-organic ore bodies — that extra capacity provides a useful buffer before performance degrades.

Teneur en cendres

• Norit RO 3515: ≤5%
• HMGOLD™7500: 2.52% (SGS verified)

This is the biggest measurable gap. HMGOLD's ash is roughly half of RO 3515's maximum specification.

Why this matters in your circuit:

Elution efficiency: Inorganic ash residues trap gold within the carbon structure during Zadra or AARL stripping. Lower ash = cleaner stripping = less residual gold left on carbon after each elution cycle. Over hundreds of cycles, that gold retention compounds into real losses.

Reactivation longevity: Ash doesn't burn off during thermal reactivation. It accumulates cycle after cycle. Carbon starting at 2.52% ash builds up contamination slower than carbon starting at 5%, maintaining its gold loading capacity through more reactivation cycles before requiring replacement.

Doré purity: Lower-ash carbon contributes fewer inorganic impurities to your final gold precipitate. If your refinery penalizes you for impurities in doré bars, your carbon's ash content directly affects your refining charges.

K Value and R Value

Here's where things get interesting. Norit/Cabot does not typically publish K value and R value for RO 3515 in the same format that Jacobi publishes for PICAGOLD G210AS.

HMGOLD™7500 publishes both:

• K value (gold loading): 28 kg/t
• R value (adsorption kinetics): 58%

These are competitive numbers. For context, Jacobi G210AS — another premium gold carbon — publishes K=28 kg/t and R=60%. HMGOLD™7500's K value matches G210AS exactly; the R value is 2 percentage points lower, which is within normal batch variation for most CIL circuits.

The fact that HMGOLD publishes K and R values while Norit does not is itself significant. If you're currently running RO 3515, you probably don't know its K and R values — unless you've tested it yourself. That means you're paying premium pricing for a carbon whose gold-specific performance metrics you may have never quantified.

Mesh Size Options

• Norit RO 3515: 6×12 only
• HMGOLD™7500: 6×12, 8×16, 5×10

RO 3515 comes in one size. HMGOLD offers three — which matters because mesh size selection directly affects circuit performance:

• 6×12: Standard for CIL circuits with aggressive inter-stage screening
• 8×16: Better for CIP circuits — faster kinetics, higher gold loading per unit mass, fewer screen blinding issues
• 5×10: Coarser option for high-abrasion circuits where attrition drives carbon consumption

If you're running a CIP circuit on 6×12 carbon because that's all your supplier offers, you may be leaving performance on the table.

Where Norit RO 3515 Still Wins

Track Record

No amount of spec-sheet comparison replaces 40+ years of operational data. RO 3515 has been tested, approved, and documented in more CIL/CIP plant operating manuals than any other gold carbon. When your client requires a "proven carbon with established track record," RO 3515 checks that box without discussion.

HMGOLD™7500 is growing — Tanzania, Ghana, South Africa, Egypt, Azerbaijan — but it doesn't have decades of data yet.

Brand Approval

Some mining companies have approved vendor lists. RO 3515 is on most of them. Getting HMGOLD approved requires a formal evaluation process — lab testing, plant trial, metallurgical report, management sign-off. That process takes 3–6 months and costs money.

If your company's procurement policy mandates approved-vendor-only purchasing, you'll need to run that approval process before HMGOLD becomes an option — regardless of how good the specs look.

Local Support

Cabot's distributor network provides local technical support in major mining regions. If you have a carbon performance issue, your Cabot rep can visit your site. Huamei's support is primarily remote (WhatsApp, email, video calls) with periodic site visits for key accounts.

For operations in remote locations where on-site technical support matters, this is a real consideration — not a deal-breaker, but a factor.

The Cost Question

Factor	Norit RO 3515	Huamei HMGOLD™7500
Pricing model	Cabot distributor network	Factory-direct
Distribution layers	Manufacturer → Regional distributor → Local agent → Mine	Manufacturer → Mine
MOQ	Varies by distributor (typically 20+ tons)	10 tons
Lead time	2–6 weeks (dependent on distributor stock)	2–3 weeks production + shipping
Échantillon	Through distributor	Free 1–2 kg sample direct
COA	Yes	Yes (SGS reports available)

The structural price difference is distribution economics. RO 3515 passes through 2–3 intermediaries between Cabot's factory and your mine. Each adds margin. HMGOLD ships factory-direct from Fujian, China — one invoice, no intermediary markup.

On equivalent specifications, the price gap is significant. But "significant" varies by region, volume, and current market conditions. Get current quotes from both suppliers for your specific requirements before making assumptions based on list prices.

The Honest Scorecard

Category	Norit RO 3515	HMGOLD™7500	Edge
Indice d'iode	≥1050 mg/g	1150 mg/g (spec) / 1208 (SGS)	HMGOLD
Teneur en cendres	≤5%	2.52% (SGS)	HMGOLD
Dureté	≥97% (ball-pan, ASTM D3802)	98.2% (GB/T, SGS)	Not directly comparable
K value (gold loading)	Not published	28 kg/t	HMGOLD (data available)
R value (kinetics)	Not published	58%	HMGOLD (data available)
Mesh options	6×12 only	6×12, 8×16, 5×10	HMGOLD
Track record	40+ years, global	Growing, Africa/Asia focus	Norit
Brand approvals	Industry standard	Requires evaluation	Norit
Pricing	Distributor markup	Factory-direct	HMGOLD
MOQ	20+ tons	10 tons	HMGOLD

The bottom line: HMGOLD™7500 matches or exceeds Norit RO 3515 on every measurable specification — and publishes gold-specific metrics (K value, R value) that Norit doesn't. What HMGOLD lacks is the decades of operational track record and automatic brand-approval status that RO 3515 carries. If your procurement decision is based on specs and price, HMGOLD wins. If it's based on institutional history and approved-vendor lists, Norit wins. For most operations, the smart move is to run a parallel trial and let the data decide.

FAQ

What activated carbon is equivalent to Norit RO 3515?

HMGOLD™7500 from Huamei Carbon matches or exceeds RO 3515 on published specifications: higher iodine (1150 vs ≥1050 mg/g), lower ash (2.52% vs ≤5%), and comparable hardness. Both are coconut shell, steam-activated carbons designed for CIL/CIP gold recovery. A bottle-roll test and plant trial with your specific ore is recommended to confirm equivalent performance in your circuit.

Is Norit RO 3515 still manufactured?

Yes. Norit RO 3515 is now manufactured by Cabot Corporation, which acquired Norit in 2012. The product continues to be available through Cabot's global distributor network. Some industry professionals report longer lead times and availability fluctuations since the acquisition, but the product specification remains unchanged.

What is the iodine number of Norit RO 3515?

Norit RO 3515 specifies a minimum iodine number of ≥1050 mg/g. This measures total micropore volume using the ASTM D4607 method. While useful as a general quality indicator, iodine number is not the primary metric for evaluating gold recovery carbon performance — K value (gold loading capacity) and R value (adsorption kinetics) are more relevant for CIL/CIP applications.

Why are mines switching from Norit RO 3515?

Three main drivers: (1) pricing — RO 3515 routes through Cabot's multi-layer distributor network, adding margin at each step; (2) alternatives have improved — Chinese manufacturers like Huamei now offer SGS-verified carbons with equivalent or superior specifications; (3) data transparency — newer brands publish gold-specific metrics (K value, R value) that help metallurgists make informed comparisons, while Norit relies on legacy reputation.

How much cheaper is HMGOLD™7500 than Norit RO 3515?

Exact pricing varies by volume, destination, and current market conditions. The structural difference comes from distribution: RO 3515 passes through 2–3 intermediaries (Cabot → regional distributor → local agent), while HMGOLD ships factory-direct. Request current quotes from both suppliers for your specific requirements — pricing from even 6 months ago may not reflect today's market.