Powder Activated Carbon: Types, Specs & Buying Guide

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	Raw Material	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

Type

Raw Material

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

Parameter	What It Measures	Typical Spec Range	Why It Matters
Iodine number	Micropore adsorption capacity (ASTM D4607)	800–1200 mg/g	Higher = better for small molecule removal (taste, odor, solvents)
Methylene blue 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
Moisture	Water content	≤10%	You're paying for carbon, not water
Ash content	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:

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
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
Sugar decolorization	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
Pharmaceutical 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

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

Sugar decolorization

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

Pharmaceutical

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 sugar decolorization 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)

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

Frequently Asked Questions

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 for Odor Removal: Industrial Applications & Selection

Odor complaints shut down projects, trigger regulatory action, and cost facilities millions in fines and community relations damage. Activated carbon is the most reliable and widely used technology for industrial odor control — it adsorbs the compounds that cause odors rather than just masking them.

This guide covers the main odor sources in industrial settings, which activated carbon types work for each, system design basics, and how to select and source the right carbon for your odor control application.

Industrial Odor Sources and the Compounds Behind Them

Most industrial odors come from a handful of compound families. Identifying the source compounds is the first step in selecting the right carbon:

Odor Source	Key Compounds	Odor Character	Detection Threshold
Wastewater treatment plants	H₂S, mercaptans, dimethyl sulfide, ammonia	Rotten eggs, cabbage, fishy	H₂S: 0.5 ppb
Composting facilities	Ammonia, amines, VOCs, H₂S	Sharp, pungent, earthy	Ammonia: 5 ppm
Food processing plants	Fatty acids, aldehydes, amines, sulfur compounds	Rancid, fishy, cooking	Varies widely
Rendering plants	Mercaptans, amines, fatty acids, H₂S	Extremely foul, putrid	Very low (ppb range)
Chemical / pharmaceutical plants	Solvents, amines, organic sulfides, phenols	Chemical, medicinal, sweet	Compound-specific
Landfills and transfer stations	H₂S, mercaptans, VOCs, ammonia	Rotten eggs, garbage, sweet	H₂S: 0.5 ppb
Pulp and paper mills	Reduced sulfur compounds (TRS), terpenes	Rotten cabbage, kraft	TRS: 1–10 ppb
Pet food / animal feed production	Amines, aldehydes, organic acids	Fishy, meaty, rancid	Low ppb range

Odor Source

Key Compounds

Odor Character

Detection Threshold

Wastewater treatment

plants

H₂S, mercaptans,

dimethyl sulfide, ammonia

Rotten eggs,

cabbage, fishy

H₂S: 0.5 ppb

Composting facilities

Ammonia, amines,

VOCs, H₂S

Sharp, pungent,

earthy

Ammonia: 5 ppm

Food processing plants

Fatty acids, aldehydes,

amines, sulfur compounds

Rancid, fishy,

cooking

Varies widely

Rendering plants

Mercaptans, amines,

fatty acids, H₂S

Extremely foul,

putrid

Very low (ppb range)

Chemical / pharmaceutical

plants

Solvents, amines,

organic sulfides, phenols

Chemical, medicinal,

sweet

Compound-specific

Landfills and transfer

stations

H₂S, mercaptans,

VOCs, ammonia

Rotten eggs, garbage,

sweet

H₂S: 0.5 ppb

Pulp and paper mills

Reduced sulfur

compounds (TRS), terpenes

Rotten cabbage,

kraft

TRS: 1–10 ppb

Pet food / animal

feed production

Amines, aldehydes,

organic acids

Fishy, meaty,

rancid

Low ppb range

The critical takeaway: most industrial odors involve sulfur compounds (H₂S, mercaptans, dimethyl sulfide) and/or nitrogen compounds (ammonia, amines). Standard virgin activated carbon handles organic odor compounds well, but sulfur and nitrogen compounds often need impregnated carbon for effective removal at the concentrations found in odor control applications.

How Activated Carbon Removes Odors

Activated carbon removes odor-causing compounds through two mechanisms:

Physical Adsorption

Organic compounds (VOCs, aldehydes, fatty acids, solvents) are trapped in the carbon's pore structure by van der Waals forces. This works well for larger organic molecules with higher boiling points. Standard virgin GAC or pellet carbon handles these effectively.

Chemisorption (Impregnated Carbon)

Small, highly volatile molecules like H₂S, ammonia, and mercaptans don't adsorb well on virgin carbon alone — their low molecular weight and high volatility mean they break through quickly. Impregnated carbon solves this by adding reactive chemicals to the carbon surface:

KOH or NaOH impregnated carbon — reacts with H₂S and other acid gases, converting them to non-volatile salts. The go-to choice for wastewater odor control
Acid-impregnated carbon — targets ammonia and amines (alkaline compounds)
Metal oxide impregnated carbon (KMnO₄, CuO) — for broad-spectrum odor control including organic sulfides and mercaptans

Most industrial odor control systems use impregnated carbon because the worst-smelling compounds (sulfur and nitrogen species) need chemical reactivity, not just physical adsorption.

Activated Carbon Types for Odor Control

Carbon Type	Best For	Form	Typical Application
KOH/NaOH impregnated pellet	H₂S, mercaptans, acid gases	Pellet (extruded) 3–4 mm	Wastewater plant headworks, pump stations, sludge handling
Acid-impregnated pellet	Ammonia, amines	Pellet 3–4 mm	Composting facilities, rendering plants, animal housing
Virgin coal-based GAC	VOCs, solvents, organic odors	Granular 4×10 or 8×30	Chemical plants, paint shops, printing facilities
Blended media (impregnated + virgin)	Mixed odor streams (H₂S + VOCs + ammonia)	Layered or mixed bed	Municipal wastewater, landfills, food processing
Coconut shell GAC	Light organic odors at low concentration	Granular 4×8 or 8×16	HVAC systems, indoor air quality

Carbon Type

Best For

Form

Typical Application

KOH/NaOH

impregnated pellet

H₂S, mercaptans,

acid gases

Pellet (extruded)

3–4 mm

Wastewater plant headworks,

pump stations, sludge handling

Acid-impregnated

pellet

Ammonia,

amines

Pellet

3–4 mm

Composting facilities,

rendering plants,

animal housing

Virgin coal-based

GAC

VOCs, solvents,

organic odors

Granular

4×10 or 8×30

Chemical plants,

paint shops,

printing facilities

Blended media

(impregnated + virgin)

Mixed odor streams

(H₂S + VOCs + ammonia)

Layered or

mixed bed

Municipal wastewater,

landfills, food processing

Coconut shell

GAC

Light organic odors

at low concentration

Granular 4×8

or 8×16

HVAC systems,

indoor air quality

For most industrial odor problems, impregnated pellet carbon is the right starting point. Pellet form provides low pressure drop in ventilation systems, and the impregnation handles the sulfur/nitrogen compounds that cause the worst odors.

Odor Control System Design

Fixed Bed Adsorbers

The most common setup for permanent odor control installations:

Design Parameter	Typical Range	Notes
Air velocity (face velocity)	0.5–2.5 m/s	Lower velocity = longer contact time = better removal
Bed depth	25–100 cm	Deeper beds for higher concentrations or strict targets
Contact time (EBRT)	0.5–4 seconds	H₂S: ≥1.5 s; VOCs: ≥0.5 s; mixed odors: ≥2 s
Inlet temperature	<50°C preferred	High temperature reduces adsorption capacity
Relative humidity	40–70% optimal	RH >80% reduces organic adsorption; moisture helps H₂S chemisorption on alkaline carbon

Manhole / Lift Station Canisters

For sewer collection systems and pump stations, small activated carbon canisters (50–200 kg carbon) are installed on ventilation outlets. These are typically replaced every 6–18 months depending on H₂S loading. Simple, low-cost, no power required.

Temporary / Mobile Units

For construction projects, emergency odor events, or seasonal odor issues, mobile carbon adsorption units can be deployed quickly. These are essentially portable vessels filled with activated carbon that connect to temporary ductwork.

Carbon Bed Life and Replacement

How long the carbon lasts depends on the odor loading, airflow, and carbon type:

Application	Typical Carbon Life	Main Factor
Wastewater headworks (H₂S 10–50 ppm)	12–24 months	H₂S concentration and humidity
Pump station canisters (H₂S 5–20 ppm)	6–18 months	H₂S load and airflow
Composting (ammonia + VOCs)	6–12 months	Ammonia loading
Food processing (mixed organics)	12–36 months	VOC concentration
Rendering plants (extreme mixed odors)	3–9 months	Very high compound loading

Spent carbon from odor control systems is generally non-hazardous and can be disposed of in standard landfills or sent for thermal reactivation. For more on spent carbon management, see our guide on spent activated carbon disposal and regeneration.

Common Mistakes in Odor Control Carbon Selection

Using virgin carbon for H₂S — virgin GAC has very limited H₂S capacity. A system designed for H₂S with virgin carbon will break through in weeks, not months. Use impregnated carbon
Undersizing contact time — cutting EBRT below 1 second to save on carbon volume is false economy. The carbon exhausts faster and needs more frequent replacement
Ignoring humidity — very dry air (<30% RH) reduces chemisorption on alkaline-impregnated carbon. Very wet air (>85% RH) blocks pores. Both reduce carbon life
Not testing the actual odor stream — odor composition varies by facility. A wastewater plant in summer has different H₂S levels than in winter. Design for peak conditions, not average
Choosing granular when pellet is better — for high-airflow ventilation systems, pellet carbon's lower pressure drop means smaller fans and lower energy costs. Granular carbon's irregular shape creates higher resistance

How to Source Activated Carbon for Odor Control

When requesting quotes, provide:

Odor source — wastewater, compost, food processing, etc.
Key compounds — H₂S, ammonia, VOCs, mercaptans (analytical data if available)
Concentrations — ppm at the system inlet
Airflow rate — m³/hr or CFM
Treatment target — discharge limit or fence-line odor threshold
System type — fixed bed, canister, or specify if you need system design support
Estimated carbon volume and replacement frequency

Huamei Carbon manufactures impregnated pellet activated carbon (KOH, NaOH, acid, and metal oxide impregnation) and coal-based granular activated carbon for odor control applications. We supply wastewater treatment facilities, composting operations, and industrial odor control projects worldwide.

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

Frequently Asked Questions

What is the best activated carbon for odor removal?

It depends on the odor compounds. For sulfur-based odors (H₂S, mercaptans — the "rotten egg" smell common at wastewater plants), KOH or NaOH impregnated pellet carbon is the standard. For ammonia and amines, acid-impregnated carbon. For organic odors (solvents, cooking fumes, VOCs), virgin coal-based granular carbon works well. Most industrial facilities have mixed odor streams and use blended or layered carbon beds.

How long does activated carbon last for odor control?

Typical carbon bed life ranges from 6 to 24 months for most industrial odor applications. Wastewater plant headworks treating 10–50 ppm H₂S typically get 12–24 months from impregnated carbon. Rendering plants with extreme odor loading may need replacement every 3–9 months. Carbon life depends on compound concentrations, airflow, humidity, and bed depth.

Can activated carbon remove hydrogen sulfide (H₂S) smell?

Yes, but you need impregnated carbon — not virgin. KOH or NaOH impregnated pellet carbon chemically reacts with H₂S, converting it to non-volatile sulfur salts on the carbon surface. Virgin carbon can only physically adsorb a small amount of H₂S before breakthrough. For any application where H₂S is the primary odor, always specify alkaline-impregnated carbon.

What is the difference between activated carbon and charcoal for odor removal?

Activated carbon is charcoal that has been processed at high temperature (800–1000°C) with steam or chemical agents to create an extensive internal pore structure — surface areas of 800–1200 m²/g compared to regular charcoal's 200–400 m²/g. This dramatically higher surface area means activated carbon adsorbs far more odor compounds per kilogram. Regular charcoal is not effective for industrial odor control.

How much activated carbon do I need for odor control?

Start with the airflow rate and required contact time. For a system treating 5,000 m³/hr of air with 2 seconds of contact time, you need approximately 2.8 m³ of carbon bed volume, which translates to roughly 1,200–1,500 kg of pellet carbon (depending on bulk density). Your carbon supplier or system designer can size the system based on your specific airflow, compounds, and treatment targets.

Pellet Activated Carbon for Water Filter Cartridges: Turkey Case Study

Turkey's water filtration market is one of the largest in the Middle East region — and water filter cartridge manufacturers there need activated carbon that fits tightly packed cartridge beds without excessive pressure drop. Pellet (extruded) activated carbon is the go-to choice for this application.

Huamei Carbon shipped 4 containers (20ft each) of pellet activated carbon to a Turkish water filter cartridge manufacturer. Here's how the project came together.

The Customer: A Turkish Water Filter Cartridge Manufacturer

The customer produces CTO (Chlorine, Taste, Odor) and other inline water filter cartridges for both the domestic Turkish market and export. They were sourcing pellet carbon from multiple suppliers but running into inconsistency — different batches had different diameters, different hardness levels, and different dust content. That meant their cartridge production line needed constant adjustment, and some batches produced cartridges with unacceptable pressure drop.

They needed a single reliable supplier who could deliver consistent pellet carbon, batch after batch, at the volumes their production required.

Why Pellet Carbon for Water Filter Cartridges?

Water filter cartridges — especially CTO-type cartridges — use pellet (extruded) activated carbon rather than granular for several reasons:

Uniform diameter — pellets are extruded to a precise diameter, so they pack evenly inside the cartridge. No gaps, no channeling, consistent flow distribution
Low dust — the extrusion process produces fewer fines than crushed granular carbon. Less dust means cleaner water from the first flush and fewer rejected cartridges on the production line
Predictable pressure drop — uniform pellet size means the pressure drop through the cartridge is consistent and calculable. This is critical for cartridge manufacturers who need to meet flow rate specifications
Good chlorine reduction — pellet carbon (especially coal-based) provides excellent free chlorine removal capacity, which is the primary function of CTO cartridges

What We Shipped

Item	Details
Product	Pellet (extruded) activated carbon
Application	Water filter cartridge manufacturing (CTO cartridges)
Destination	Turkey
Shipment size	4 × 20ft containers
Packaging	25 kg bags on pallets

How We Solved the Consistency Problem

The customer's core complaint about previous suppliers was batch-to-batch variation. Here's what we did differently:

Production Control

Every batch of pellet carbon goes through the same extrusion line with locked-in process parameters — extrusion pressure, die diameter, carbonization temperature, and activation time. Changing suppliers or raw materials mid-run doesn't happen. The result is pellets that look and perform the same whether it's the first container or the fourth.

Pre-Shipment Screening

After activation, the pellets are screened to remove any broken pieces and dust. The customer receives clean, uniform pellets that go straight into their cartridge filling line without additional processing.

Quality Documentation

Each container ships with a Certificate of Analysis showing the key parameters the customer cares about. No surprises at the receiving end — they know exactly what's in the container before it arrives.

The Result

The customer reported that the cartridge production line ran smoothly without the constant adjustments they'd been making with previous suppliers. Pressure drop across their finished cartridges was consistent, and the first-pass rejection rate dropped because there were fewer cartridges with excessive fines or flow problems.

They've since placed repeat orders — consistency at scale is what keeps cartridge manufacturers coming back.

Turkey's Water Filtration Market

Turkey is both a major consumer and exporter of water filtration products. Turkish manufacturers produce millions of water filter cartridges annually for domestic use (point-of-use and point-of-entry systems) and for export to Europe, the Middle East, and Africa.

The demand for activated carbon in Turkey's filtration industry is driven by:

Growing domestic water purifier adoption — Turkish consumers increasingly install under-sink and countertop filtration systems
Export manufacturing — Turkey is a cost-competitive production base for water filtration products sold into EU and MENA markets
Municipal water quality concerns — chlorine disinfection is standard in Turkish municipal water, creating demand for chlorine-removing CTO cartridges

For cartridge manufacturers operating at these volumes, having a stable activated carbon supply chain is not optional — it's a production requirement.

Choosing Pellet Carbon for Your Filtration Products

If you manufacture water filter cartridges or filtration systems and you're evaluating pellet activated carbon suppliers, here's what matters:

Diameter consistency — request the diameter tolerance range. Tight tolerance means predictable cartridge packing and pressure drop
Dust content — lower is better for cartridge production. High dust means more fines in the first flush and potential customer complaints
Hardness — pellets need to survive the cartridge filling process and shipping without breaking. Higher hardness = fewer fines generated during handling
Chlorine reduction capacity — for CTO cartridges, this is the key performance metric. Request test data per ASTM or NSF/ANSI 42 protocol
Sample testing — run a trial batch through your production line before committing to a container order. Check packing density, pressure drop, and cartridge performance

Huamei Carbon manufactures pellet activated carbon in multiple diameters for water filtration, air purification, and gas treatment applications. We supply filter cartridge manufacturers in Turkey, Southeast Asia, South America, and other regions.

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

Frequently Asked Questions

What type of activated carbon is used in water filter cartridges?

Pellet (extruded) activated carbon is the standard for CTO and inline water filter cartridges. The uniform cylindrical shape provides consistent packing, predictable pressure drop, and low dust — all critical for cartridge manufacturing. Granular activated carbon is used in some larger-format filters, but pellet carbon dominates the cartridge market.

Why do water filter manufacturers prefer pellet carbon over granular?

Pellet carbon has a uniform diameter that packs consistently in cartridges, producing predictable flow rates and pressure drops. Granular carbon has irregular shapes that can create channeling (uneven flow) and generate more dust. For automated cartridge filling lines, pellet carbon's uniformity means fewer production line adjustments and lower rejection rates.

Can Huamei supply pellet activated carbon to Turkey?

Yes. We regularly ship to Turkish ports (Mersin, Istanbul, Izmir) in 20ft containers. Transit time from China is typically 20–30 days. We've supplied multiple Turkish water filter cartridge manufacturers and can provide samples for production trials before bulk orders.

What is CTO activated carbon?

CTO stands for Chlorine, Taste, and Odor — the three main things the carbon removes in a drinking water filter cartridge. CTO cartridges use activated carbon (usually pellet form) to adsorb free chlorine, organic compounds that cause bad taste, and volatile compounds that cause odors. They're the most common type of activated carbon water filter cartridge worldwide.

How much pellet activated carbon does a water filter cartridge manufacturer need?

It depends on production volume and cartridge size. A standard 10-inch CTO cartridge uses approximately 300–500 grams of pellet carbon. A manufacturer producing 10,000 cartridges per day would consume roughly 3–5 tons of carbon per day, or 80–130 tons per month. Most medium to large cartridge manufacturers order in container quantities (18–20 tons per 20ft container).

Activated Carbon for Gas Treatment: Mercury, H₂S, VOC & More

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
VOCs	Process vents, tank emissions, fugitive sources	Emissions compliance, health hazard	Adsorption with optional thermal desorption

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

VOCs

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.

Specifications:

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.

Specifications:

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.

Specifications:

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	Impregnation	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:

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

Huamei Carbon produces coal-based pellet activated carbon 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

Frequently Asked Questions

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 for Petroleum Refining: Applications & Specs

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, coal-based	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

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,

coal-based

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.

Specifications:

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.

Specifications:

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.

Specifications:

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:

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
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

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:

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

Huamei Carbon supplies coal-based granular and pellet activated carbon 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

Frequently Asked Questions

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.