56 Tons Coconut Shell Carbon Powder to Turkey for CTO Cartridge Production

A Turkish water filter manufacturer ordered 56 tons of coconut shell activated carbon powder for their CTO (Carbon Block) cartridge production line. The carbon is used as the primary filtration media in household and commercial drinking water filter cartridges — the type you find inside under-sink purifiers, refrigerator filters, and point-of-use water dispensers.

Here's how we handled this order from specification to delivery.

What is a CTO Carbon Block Cartridge?

CTO stands for Chlorine, Taste, and Odor — the three things these cartridges are designed to remove from tap water. Unlike loose GAC (granular activated carbon) filters where carbon granules sit loosely inside a housing, CTO cartridges are solid carbon blocks made by mixing fine carbon powder with a polyethylene (PE) binder and sintering them under heat and pressure.

The result is a dense, uniform block with no channeling, no carbon fines in your water, and significantly better chlorine removal performance than loose GAC at the same contact time.

Why carbon powder is required:

The sintering process needs particles fine enough to create a homogeneous mixture with PE powder. If the carbon is too coarse, the block has voids, weak spots, and inconsistent filtration. Standard CTO production requires 80×325 mesh carbon powder — particles between 0.044mm and 0.177mm.

Client Requirements

This manufacturer produces approximately 3 million CTO cartridges per year for both their own brand and OEM customers across Europe and the Middle East. Their spec:

Parameter	Client specification	What we supplied
Raw material	Coconut shell	Sri Lanka origin coconut shell
Particle size	80×325 mesh (≥90% within range)	93.5% within 80×325 mesh
Йодное число	≥1100 mg/g	1150 mg/g
Зольность	≤3%	2.4%
Влага	≤5%	3%
pH	6.5–8.0	7.2
Apparent density	0.45–0.55 g/mL	0.48 g/mL
Iron content	≤0.05%	0.02%
Acid-soluble matter	≤1%	0.6%
Water extract conductivity	≤80 μS/cm	52 μS/cm
Chlorine reduction capacity	≥12,000 gallons (per NSF 42 at 0.5 gpm)	Verified by client's in-house test

Why these specs matter for CTO production:

Particle size 80×325 mesh: Too coarse → voids in the block. Too fine → excessive pressure drop, slow flow rate. 80×325 is the sweet spot for standard 10-inch CTO cartridges.
Low ash (≤3%): High ash = minerals leaching into filtered water = failed taste test and potential health concerns.
Low iron (≤0.05%): Iron causes discoloration of the carbon block and can leach, creating metallic taste.
Low conductivity of water extract: Proves the carbon won't release ionic contaminants into the drinking water.
High iodine (≥1100): More micropores = more chlorine adsorption sites = longer cartridge life before breakthrough.

Why Coconut Shell Carbon for Drinking Water Cartridges

Not all activated carbon is suitable for CTO cartridge production. Here's why coconut shell dominates the drinking water filter market:

Factor	Coconut shell	Coal-based	Wood-based
Зольность	3%	8–12%	3–7%
Taste/odor of carbon itself	Neutral	Slight smoky note possible	Possible woody note
Micropore ratio	Very high (>90%)	Medium (60–70%)	Low (40–50%)
Chlorine removal efficiency	Excellent	Good	Fair
NSF 42/61 certification path	Standard	Requires more washing	Possible but less common
Food safety profile	Excellent	Acceptable with washing	Good
Cost per ton	Higher	Lower	Medium

The micropore advantage: Chlorine molecules are small. They're captured in micropores (<2nm diameter). Coconut shell carbon has the highest micropore ratio of any activated carbon type — meaning more of its internal surface area is actually useful for chlorine removal. This translates directly to longer cartridge life.

Food safety: Drinking water cartridges must pass extractables testing — hot water is passed through the carbon and the extract is analyzed for heavy metals, PAHs, and other contaminants. Low-ash coconut shell carbon passes these tests more easily than coal-based alternatives.

CTO Production Process (How Our Carbon Becomes a Filter Cartridge)

For context on why our specs matter, here's the basic CTO manufacturing process:

Mixing: Our 80×325 mesh coconut carbon powder is blended with UHMWPE (ultra-high molecular weight polyethylene) powder at approximately 60–70% carbon / 30–40% PE ratio
Filling: The mixture is poured into a cylindrical mold with a center core rod
Sintering: Heated to 180–220°C — the PE melts and binds the carbon particles together
Cooling: Controlled cooling to prevent cracking
Demolding: The solid carbon block is removed
Testing: Flow rate, pressure drop, chlorine reduction, and particle shedding tests
Assembly: Wrapped in non-woven fabric, end caps applied, packaged

What happens if carbon quality is wrong:

Ash too high → Failed extractables test → entire production batch rejected
Particle size too coarse → Weak block structure, breaks during handling
Particle size too fine → Flow rate too low, cartridge unusable
Moisture too high → Uneven PE melting during sintering → voids and weak spots
Iron too high → Dark spots in block, customer complaints about water color

This is why CTO manufacturers are the most demanding activated carbon buyers — every parameter directly affects whether the final cartridge works or gets scrapped.

Quality Control for This Shipment

Pre-production:

Raw coconut shell charcoal sourced from Sri Lanka (highest fixed carbon content)
Charcoal pre-tested for heavy metals before processing

Production:

Steam activation at 900–1000°C
Grinding to 80×325 mesh with air classifier to remove oversized and undersized particles
Acid washing to reduce ash and iron to target levels
Water washing to reduce pH and conductivity of water extract
Drying to ≤5% moisture

Testing (every 5-ton lot):

Particle size distribution (sieve analysis: 80, 100, 200, 325 mesh)
Iodine number (ASTM D4607)
Ash content (ASTM D2866)
Moisture (ASTM D2867)
pH of water extract
Iron content (AAS method)
Conductivity of water extract
Apparent density

Final inspection:

Composite sample from all lots — full panel retest
Client's QC engineer visited factory for pre-shipment inspection
Samples sent to client for trial sintering before bulk shipment approval

Huamei Carbon factory warehouse: 1-ton jumbo bags (FIBC) of coconut shell activated carbon stacked on wooden pallets, ready for container loading and export shipment

Packing & Shipping

Item	Detail
Packing	1-ton jumbo bags (FIBC), double PE inner liner
Bags per container	28 bags per 40'HQ
Total containers	2 × 40'HQ
Loading	Fork-loaded, secured with dunnage bags
Moisture protection	Double PE liner + silica gel sachets inside each jumbo bag
Port of loading	Xiamen
Port of discharge	Mersin, Turkey
Transit time	22 days

Why double PE liner for carbon powder:
Carbon powder is hygroscopic — it absorbs moisture from air. During the 22-day sea transit through the Suez Canal (high humidity), unprotected carbon can gain 3–5% moisture. Double PE liner keeps moisture gain below 0.5% during transit. This matters because excess moisture causes sintering defects in CTO production.

Client Performance Feedback

After running our carbon through their CTO production line (first batch = 5 tons for validation):

Sintering quality: Zero void defects, uniform block density
Cartridge chlorine reduction: Achieved 15,000+ gallons at 2ppm inlet chlorine (exceeded their 12,000-gallon minimum)
Flow rate: 0.5 gpm at <10 psi pressure drop (within spec)
Taste/odor test: Passed — no carbon taste or smell in filtered water
Extractables test: Passed NSF 42 and NSF 61 requirements
Particle shedding: None detected after initial 5-gallon flush

They've confirmed a supply agreement for 56 tons per quarter (224 tons/year).

CTO Carbon Powder Specifications Summary

If you're a CTO cartridge manufacturer sourcing activated carbon, here are the key specs to look for:

Parameter	Minimum for CTO	Ideal range	Why it matters
Raw material	Coconut shell	Coconut shell	Lowest ash, best micropore ratio
Размер ячейки	80×200 minimum	80×325	Proper block density and flow rate
Йодное число	≥1000 mg/g	1100–1200 mg/g	Cartridge lifespan
Пепел	≤5%	≤3%	Extractables testing
Iron	≤0.1%	≤0.05%	Prevents discoloration and metallic taste
pH	6–9	6.5–8.0	Neutral water output
Влага	≤8%	≤5%	Sintering quality
Conductivity (water extract)	≤150 μS/cm	≤80 μS/cm	Low ionic leaching
Apparent density	0.40–0.60 g/mL	0.45–0.55 g/mL	Consistent block weight and density

ЧАСТО ЗАДАВАЕМЫЕ ВОПРОСЫ

What activated carbon is used in CTO water filter cartridges?

CTO (Carbon Block) cartridges use coconut shell activated carbon powder in 80×325 mesh size. The powder is mixed with polyethylene binder and sintered into a solid block. Coconut shell is preferred because of its high micropore content (best for chlorine removal), low ash (passes food-safety extractables tests), and neutral taste profile. Coal-based carbon is rarely used in drinking water cartridges due to higher ash and potential taste issues.

What mesh size carbon is needed for CTO cartridge production?

80×325 mesh (0.044–0.177mm particle size) is the standard for most 10-inch CTO cartridges. Some manufacturers use 100×325 for tighter blocks with slower flow, or 50×200 for faster flow but slightly lower chlorine removal. The exact size depends on your target flow rate and pressure drop specifications.

How much activated carbon goes into one CTO cartridge?

A standard 10-inch × 2.5-inch CTO cartridge contains approximately 300–450 grams of activated carbon (60–70% of total block weight, remainder is PE binder). A 10-inch × 4.5-inch "big blue" cartridge contains approximately 1,200–1,500 grams. One ton of carbon powder produces approximately 2,200–3,300 standard cartridges.

What certifications does CTO carbon need?

The carbon itself doesn't carry NSF certification — the finished cartridge does. However, the carbon must be produced to a standard that allows the cartridge to pass NSF 42 (aesthetic effects — chlorine, taste, odor) and NSF 61 (health effects — extractables). Key requirements: low heavy metals, low ash, low conductivity of water extract, no PAH contamination. We supply carbon that has been validated by multiple NSF-certified cartridge manufacturers.

How long does a CTO cartridge last?

Typically 6–12 months or 1,000–3,000 gallons depending on inlet water quality and cartridge size. The carbon's iodine number directly determines cartridge life — higher iodine (1100+) gives 20–30% longer life compared to standard 900 iodine carbon. Our 1150 iodine number coconut shell carbon helps manufacturers deliver longer-rated cartridges as a competitive advantage.

Supply Capability for CTO Manufacturers

Продукт: Coconut shell activated carbon powder, 80×325 mesh, acid-washed
Capacity: 200+ tons/month available for CTO-grade production
MOQ: 10 tons (sample available for trial sintering)
Lead time: 14–18 days production; 7 days for stock items
Certifications: ISO 9001, factory auditable, pre-shipment third-party inspection available

Huamei Activated Carbon Co., Ltd.
Website: www.huameicarbon.com

52 Tons Pellet Activated Carbon to the Middle East for VOC Treatment

In Q2 2026, we shipped 52 tons of 4mm coal-based pellet activated carbon to a petrochemical client in the Middle East. The carbon is used in fixed-bed adsorbers for VOC removal from process exhaust — specifically toluene, xylene, and mixed C5–C9 hydrocarbons at 40–60°C inlet temperature.

This is how the order went from first inquiry to delivery.

Client Requirements

The client operates a plastics manufacturing complex with three exhaust streams requiring VOC treatment. Their existing carbon (sourced from a European distributor) was underperforming — breakthrough happening at 60% of rated bed life.

Parameter	Client specification	What we supplied
Carbon type	Coal-based pellet (extruded)	4mm coal-based pellet
Диаметр	4.0 mm	4.0 mm (±0.2 mm tolerance)
Йодное число	≥900 mg/g	950 mg/g (tested)
Значение КТК	≥60%	65% (tested)
твердость	≥95%	97%
Влага	≤5%	3.2%
Зольность	≤12%	9.5%
Насыпная плотность	450–550 g/L	480 g/L
Количество	56 tons (3 adsorbers × ~18.5 tons each)	56 тонн

The CTC (carbon tetrachloride activity) value was the critical spec — it measures vapor-phase adsorption capacity, which directly determines how long the bed lasts before breakthrough. Their previous supplier was delivering 55–58% CTC, which explains the early breakthrough.

Why Pellet Carbon for VOC Applications

Pellet (extruded) activated carbon is the standard choice for gas-phase VOC treatment because:

Uniform shape = predictable pressure drop across the bed (critical when you're pushing thousands of m³/hr of air through)
Low dust = no downstream particulate issues, cleaner exhaust
Mechanical strength = survives thermal regeneration cycles without crumbling
Consistent packing = no channeling, uniform gas distribution

Granular carbon (irregular shape) creates 20–40% higher pressure drop at the same flow rate and generates more dust during handling and operation. For large gas-phase adsorbers, pellet is always the better engineering choice.

Production & Quality Control

The 52-ton order took 12 days to produce. Our QC process for this shipment:

Raw material stage:

Ningxia anthracite coal selected for high fixed carbon content (≥80%)
Coal pre-tested for ash and volatile content before entering production

In-process checks:

Extrusion diameter checked every 2 hours (4.0 ±0.2 mm)
Carbonization temperature: 600–700°C
Activation temperature: 850–950°C (steam activation)
Activation time adjusted to hit target CTC ≥60%

Finished product testing (every 5-ton batch):

Iodine number (ASTM D4607)
CTC value (ASTM D3467)
Hardness (ASTM D3802)
Moisture, ash, pH, bulk density
Particle size distribution (sieve analysis)

Final COA:

We issued 12 batch COAs (one per ~5 tons) plus a composite COA for the full 52 tons. Client also requested third-party SGS inspection before loading — passed without issues.

Packing & Loading

Item	Detail
Packing	25 kg woven PP bags, palletized
Bags per pallet	40 bags (1 ton/pallet)
Total pallets	52
Container type	2 × 40' HQ containers
Loading per container	26 tons each
Moisture barrier	PE liner inside container
Fumigation	Methyl bromide free (client requirement)

Pellet carbon is sensitive to moisture absorption during transit — especially to the Middle East where port humidity can be high. We line each container with PE sheeting and include silica gel desiccant packs as standard for Gulf destinations.

Logistics & Delivery

Stage	Timeline
Order confirmed	Day 0
Production complete	Day 12
SGS inspection	Day 14
Container loading	Day 15
Port departure (Tianjin)	Day 18
Arrival at destination port	Day 38 (20 days transit)
Client confirmation received	Day 42

Total lead time from order to delivery: 42 days. Production was the bottleneck (12 days) — transit time to the Gulf is fixed at ~20 days from North China ports.

For clients who need faster delivery: we maintain 200+ tons of 4mm pellet carbon in stock at any given time. Stock orders can ship within 3–5 days of payment, cutting total delivery to under 30 days.

Performance Feedback

Six weeks after installation, the client reported:

Bed life extended by approximately 25% compared to their previous European-sourced carbon
Pressure drop 8% lower than previous batch (better uniformity in our pellets)
Outlet VOC concentration consistently below their 20 mg/m³ emission limit
No dust issues during loading or operation

They've since placed a second order (same spec, 52 tons) for their scheduled bed replacement in Q4 2026. Annual consumption: ~112 tons.

Cost Comparison

The client's previous carbon was sourced through a European distributor at approximately $2,800–3,200/ton CIF. Our direct factory price delivered CIF to their port:

30–40% lower than their European distributor price
Same or better specs (CTC 65% vs their previous 55–58%)
Faster reorder (we know their spec, production starts immediately)

The cost saving on 112 tons/year is significant. And the better CTC value means longer bed life — so actual cost-per-operating-hour drops even further.

Specs Summary for VOC Pellet Carbon

If you're running a similar VOC treatment system, here's what to specify:

Parameter	Recommended for VOC	Why it matters
Тип	Coal-based pellet (extruded)	Low pressure drop, survives regeneration
Диаметр	3 mm or 4 mm	4mm for high-flow; 3mm for higher removal but more ΔP
КТК	≥60% (higher is better)	Directly determines bed life for VOC adsorption
Iodine	≥900 mg/g	General adsorption capacity indicator
твердость	≥95%	Must survive handling + regeneration cycles
Пепел	≤12%	High ash = less active carbon per kg
MOQ	10 tons	Our minimum order for custom specs

ЧАСТО ЗАДАВАЕМЫЕ ВОПРОСЫ

What activated carbon is best for VOC removal?

Coal-based pellet (extruded) activated carbon in 3mm or 4mm diameter is the industry standard for fixed-bed VOC adsorption. The key spec is CTC value (carbon tetrachloride activity) — aim for ≥60%. Higher CTC means more vapor-phase adsorption capacity and longer bed life between regeneration or replacement cycles.

How much pellet activated carbon does a VOC treatment system need?

It depends on gas flow rate, VOC concentration, and target outlet concentration. A typical industrial adsorber treating 10,000–30,000 m³/hr of exhaust uses 15–25 tons of carbon per vessel. Most systems have 2–3 vessels (one adsorbing, one regenerating, one on standby). Annual replacement or top-up is typically 15–25% of total bed volume.

What's the difference between 3mm and 4mm pellet carbon?

3mm pellets have more surface area per unit volume (better removal efficiency) but create higher pressure drop. 4mm pellets have lower pressure drop (less fan energy needed) but slightly lower removal kinetics. For high-flow industrial systems (>20,000 m³/hr), 4mm is usually preferred. For smaller systems or when emission limits are very tight, 3mm may be worth the extra pressure drop.

How long does pellet activated carbon last in VOC treatment?

Typically 12–18 months before replacement is needed, depending on inlet VOC concentration and whether the system includes thermal regeneration. With on-site steam or hot nitrogen regeneration, the same carbon can last 3–5 years before adsorption capacity degrades below useful levels. Without regeneration, it's a one-time use with 12–18 month life.

Can you supply pellet carbon with higher CTC for heavy VOC loads?

Yes. Our standard 4mm pellet runs CTC 60–65%. For heavy-duty applications (high VOC concentration or tight emission limits), we produce a high-CTC variant at 70–75% CTC. This requires longer activation time and yields less per batch, so price is approximately 15–20% higher. MOQ 10 tons, lead time 15–18 days.

Ready to Order?

We supply 3mm and 4mm coal-based pellet activated carbon for VOC, solvent recovery, and industrial gas treatment. MOQ 3 tons, monthly capacity 700+ tons across all grades, CIF delivery worldwide.

Huamei Activated Carbon Co., Ltd.
Website: www.huameicarbon.com

600 Tons of Gold Recovery Carbon Shipped in June — How a Burned Buyer Found a Reliable Supplier

Case Study: 600 Tons of Gold Recovery Carbon Shipped in June — How a Burned Buyer Found a Reliable Supplier

When your activated carbon supplier mixes palm shell into your coconut shell carbon, you don't just lose money — you lose gold. Literally.

This is the story of one of our clients in Burkina Faso, how they got burned by a dishonest supplier, and how we earned their trust with 112 tons on the first order.

The Problem: Contaminated Carbon, Lost Gold

Our client operates a gold recovery plant in Burkina Faso using CIL circuits. They'd been buying 6×12 mesh активированный уголь из скорлупы кокосового ореха from another Chinese supplier for about a year. Production numbers looked fine at first.

Then recovery rates started dropping.

They sent samples to an independent lab. The results:

The "coconut shell" carbon was mixed with palm shell activated carbon — roughly 30–40% of each batch
Hardness was inconsistent (85–90% instead of the promised 98%+)
Gold loading capacity dropped significantly
Carbon was breaking down faster in the circuit, increasing losses to fine carbon

The cost of being cheated:

Estimated gold losses: tens of thousands of dollars per month
Wasted carbon replacement costs
Downtime for circuit troubleshooting
6+ months of below-target recovery before the problem was identified

Palm shell carbon looks similar to coconut shell carbon visually. The supplier was betting they'd never test it. They were wrong — just too late.

How They Found Us

After the fraud was confirmed, our client asked around. A business contact who'd been buying from us for 3+ years made the introduction.

Their requirements were specific:

Продукт: активированный уголь из скорлупы кокоса, 6×12 mesh
Iodine number: 1100 mg/g minimum
Применение: Gold recovery (CIL)
Твердость: 98%+ (non-negotiable after their experience)
Verification: Third-party SGS testing before shipment
First order: 112 tons (4 × 40HQ containers)

They were cautious. Understandably. They requested:

Factory video call showing our coconut shell carbonization and activation lines
Retain samples from our last 3 batches to their gold mining clients
SGS pre-shipment inspection for the first order

We agreed to everything. If your product is real, transparency costs nothing.

The Specs We Delivered

Parameter	Client Requirement	Our Delivery
Raw material	100% coconut shell	100% coconut shell (verified)
Размер ячейки	6×12	6×12
Йодное число	≥1100 mg/g	1120–1150 mg/g
твердость	≥98%	98.5–99%
Зольность	≤3%	2.1–2.5%
Влага	≤10%	6.5%

Every batch tested by our lab + SGS verification on first shipment.

June Shipment: 600 Tons Total, This Client 112 Tons

June alone, we shipped 600 тонн of gold-grade coconut shell activated carbon across multiple clients. This Burkina Faso client took 112 tons — 4 × 40HQ containers loaded at Nansha Port (南沙港).

Yesterday's shipment: 4 × 40HQ loaded and on the water, destination Burkina Faso.

The relationship started because:

Recovery rates went back up immediately after switching to our carbon
Every batch matches the first sample — no surprises
We hit delivery timelines consistently
Zero disputes since the first order

How to Avoid Getting Burned Like This

If you're buying coconut shell activated carbon for gold recovery, here's how to protect yourself:

Test every batch independently — Don't rely on supplier COAs alone. At minimum, check iodine number and hardness. A density/buoyancy test can quickly flag palm shell contamination (palm shell is lighter).
Check hardness numbers carefully — Pure coconut shell carbon delivers 98%+ hardness. If results come back 85–92%, something else is in there.
Request SGS/BV inspection for first orders — $200–400 for peace of mind on a $50,000+ shipment is obvious math.
Visit the factory if possible — See the raw material storage. Coconut shell and palm shell look different before carbonization. If they won't let you near the raw material area, ask yourself why.

About This Product

Spec	Detail
Продукт	Coconut Shell Activated Carbon for Gold Recovery
Размер ячейки	6×12
твердость	98%+
Йодное число	1100+ mg/g
Activation	Steam activated
Loading port	Nansha Port, Guangzhou / Xiamen Port
Production capacity	700+ tons/month
MOQ	10 tons
Упаковка	25kg PP bags or 500kg jumbo bags

ЧАСТО ЗАДАВАЕМЫЕ ВОПРОСЫ

How can I tell coconut shell from palm shell carbon?

Lab testing is most reliable (hardness, ash content, density). Visual inspection: coconut shell carbon is darker, denser, and has a more uniform granule shape. Palm shell tends to be lighter in color with more irregular shapes. A simple water float test also helps — palm shell carbon has lower density and more pieces float.

Why do some suppliers mix palm shell in?

Money. Palm shell is $500–800/ton cheaper than coconut shell as raw material. Mixing 30–40% palm shell into a batch increases profit margin by $200–300/ton. Multiply that by hundreds of tons and the incentive is clear.

Does palm shell carbon work for gold recovery?

Poorly. Lower hardness means more breakage in CIL/CIP circuits (= gold losses to fine carbon). Lower gold adsorption value means less gold loaded per kg of carbon. It's not worthless, but it's not what you're paying for when you order coconut shell grade.

How long does production typically take?

Standard specs: 7–15 days. Custom specifications (special mesh size, impregnation, acid washing): 15–25 days. These timelines assume raw material is in stock — confirm with your supplier before finalizing delivery schedules.

Get a Quote

If your current carbon isn't performing — or you just want to verify what you're actually getting — talk to us. We ship what we promise. 600 tons this month proves it.