Coal-based carbon for air filtration
Coal-Based Activated Carbon for Air Filtration: Iodine Value, CTC and Particle Size Selection Guide
Coal-based granular activated carbon is made by high-temperature steam activation, giving a hard, dense granule with a pore network suited to removing VOCs, solvent vapours and odours from process air and exhaust streams. The granular form keeps pressure drop workable in packed beds while the coal precursor balances capacity and strength. Reference values for this series are confirmed batch by batch before quotation.
Share your airflow, target iodine value and particle size; supply details are confirmed before quotation.
- Iodine value
- 500 – 1100 mg/g
- Methylene blue adsorption
- ≥ 90 mg/g
DESCRIPTION
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Coal-based granular activated carbon is produced by high-temperature steam activation, which creates an internal pore network suited to adsorbing a broad range of airborne contaminants. Its hard, dense granules resist attrition, making it practical for fixed-bed air filtration where the carbon must hold its shape through repeated handling and extended service.
Where It Fits in Air Filtration
It is commonly used to remove volatile organic compounds, solvent vapors and odors from process air, exhaust streams and indoor environments. The granular form lets air pass through a packed bed at relatively low pressure drop, while the coal precursor balances adsorption capacity and mechanical strength.
Selection Considerations
Target contaminant and concentration: adsorption behavior differs between light organics, heavier vapors and odor compounds.
Contact time and airflow: slower gas velocity generally improves capture but increases vessel size and pressure drop.
Particle size: this affects pressure drop and bed packing, so match the range to the airflow requirement.
Moisture and temperature: high humidity or elevated temperature can reduce working capacity.
Specification Notes and Inquiry
Indicators such as iodine value, hardness, moisture, ash content, bulk density and particle size are supplied against the frozen specification range, with individual values confirmed batch by batch. When requesting a quotation, include the target pollutant and concentration, airflow or vessel dimensions, required particle size, operating temperature and humidity, and the quantity needed.
SPECIFICATIONS
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Values below are reference ranges for the coal-based granular series, not a single fixed grade. Batch-specific figures are confirmed before quotation.
| Iodine value | 500 – 1100 mg/g |
|---|---|
| Methylene blue adsorption | ≥ 90 mg/g |
| BET surface area | 650 – 1000 m²/g |
| CTC adsorption | 35 – 95 % |
| Ash content | 8 – 20 % |
| Moisture | ≤ 8 % |
| Hardness | ≥ 90 % |
| Bulk density | 0.5 – 0.65 g/cm³ |
| pH value | 7 – 11 |
| Particle size | 4 – 40 目 |
ADVANTAGES
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What a buyer can check before placing an order.
Five material series from one supplier
Coal-based, coconut shell, wood-based, nutshell and bamboo activated carbon are produced and exported directly, so different filtration duties can be covered without splitting the order across suppliers.
Material choice
OUR COMMITMENTS
Six Reasons Industrial Buyers Trust Sanniu Carbon
How an enquiry is handled: we confirm the application and product form first, then agree the commercial terms in writing.
Application review before selection advice
We ask about the medium being treated, the airflow or concentration range, the target figure and the intended particle size, then discuss a selection direction rather than quoting blind.
Scope of reference documents stated plainly
We explain which specification and which document applies to the grade under discussion; batch indicators and available files are confirmed before the transaction.
Packing and moisture protection agreed at order
Packing format and anti-moisture requirements are checked when the order is confirmed, and the agreed order information governs what is supplied.
Price, availability and lead time confirmed by staff
Price, available quantity and delivery time are verified by a person and confirmed through a written quotation or order, not inferred from this page.
Follow-up through the agreed contact channel
Questions about use or documents after delivery are received and followed up through the contact channel agreed with the buyer.
CREDENTIALS
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ISO 9001:2015
Registrati0n No: 06524Q01338R0S
Certificate of Analysis
B-R2409C3836
Certificate of Analysis
Report No. A2260506150101001
Certificate of Analysis
No. 1621112086
Certificate of Analysis
NO.250100320443888
Certificate of Analysis
NO. 1524070087
PACKAGING
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Packing for coal-based granular carbon is fixed at order confirmation, and moisture protection can be discussed for humid routes.
PE-lined bags for standard shipments
Granular carbon is filled into bags with a PE inner liner to limit moisture pickup in transit, then palletised or loaded loose depending on the agreed packing format.
Bag format confirmed per order
Bulk bags for larger vessels and beds
Bulk bags reduce handling steps and limit dust when filling larger adsorption vessels; the exact fill weight is agreed when the order is confirmed.
Fill weight confirmed per order
Moisture protection for humid routes
For humid shipping routes, desiccant or vacuum packing can be discussed so the carbon arrives closer to its as-supplied moisture condition.
Option agreed per order
Pallet and container loading
Pallets and container loading are arranged to suit the shipment; the final loading plan follows the order information confirmed with the buyer.
Loading plan per order
Labels and marks per buyer instruction
Bag marks and shipping labels are prepared according to the buyer's written instruction, so consignments can be identified on arrival at the plant.
Marks per buyer instruction
PROCESS
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These steps describe how coal-based activated carbon is specified and confirmed; they are not a warranty, lead-time or performance guarantee.
Inquiry and Application Review
We review your treatment target, airflow or concentration, and required carbon form before discussing any selection direction.
Specification and Scope Confirmation
We explain the applicable scope of the quoted specifications and documents. Batch values and available files are confirmed before order.
Order Details and Packaging Check
On order confirmation we verify packaging format and moisture protection requirements against the information both parties confirm.
Commercial Terms Verified by Hand
Price, available quantity and delivery timing are checked by our team and follow the written quotation or order both sides confirm.
Delivery Follow-Up and Support
After delivery we receive and follow up questions on use or documents through the agreed contact channel.
DIMENSIONS
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Coal-based granular activated carbon suits packed air filtration beds. Selection balances adsorption capacity against particle size and airflow resistance.
Product form
Coal-based granular activated carbon
Granular activated carbon produced from coal, screened to a defined particle size range for fixed beds and continuous water treatment columns.
Product form
Granular activated carbon
Granular media for fixed-bed adsorption and filtration. Compare particle size, pressure drop and handling needs.
Application
Air and gas purification
Odour control, solvent recovery and flue gas treatment, where the carbon has to hold up in the gas phase rather than in a water column.
Material
Coal-based activated carbon
A versatile material family for industrial treatment, with granular, pellet and powder forms selected to suit the process.
FAQ
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Answers to common questions on selecting coal-based activated carbon for air filtration.
What information do you need to quote a coal-based carbon for air filtration?
Tell us the air stream or medium being treated, the flow rate or pollutant concentration, the target outlet figure, and the particle size you can accept. With those details we confirm the suitable coal-based granular grade, the iodine value and CTC level that fit the duty, and the batch specification plan before pricing. Price, available quantity and lead time are verified by our team against a written quotation or order.
Which specifications matter most when choosing the grade?
For air filtration, start with iodine value and CTC adsorption, which indicate how much the carbon can take up. Then check methylene blue adsorption, BET surface area and hardness for working life under handling, and particle size for pressure drop in your vessel. Moisture, ash, bulk density and pH also affect loading and bed behaviour. Our referenced coal-based granular range is confirmed batch by batch before quotation, so ask for the current values for the grade you are considering.
What particle size should I choose for my filter bed?
Particle size drives both contact time and pressure drop. Finer sizes give more surface contact but raise resistance; coarser sizes lower resistance but may shorten contact time. The referenced range for this coal-based granular series is 4 to 40 mesh, and the batch value is confirmed before quotation. Share your airflow, bed depth and permitted pressure drop, and we can discuss which size band suits your equipment.
How should I prepare before requesting a sample?
Describe the application, the contaminant or odour to be removed, the air flow and concentration, and your target result. Also state the required particle size, the quantity you expect to buy, and any packing or moisture-control needs. These details let us confirm the grade and the documents that apply to it. Sampling arrangements and any related costs are handled by our team rather than assumed from this page.
Which documents are available with a coal-based carbon order?
Our management system certificate covers activated carbon sales, and we can explain the reports and safety data sheets that apply to the grade you select. Sample test reports describe only the sample tested, not the whole series. The exact documents issued with your shipment are confirmed against your order, so please tell us which certificates or declarations your receiving or compliance process requires.
Can you guarantee a fixed performance figure for my application?
We do not promise a fixed performance result without knowing the actual operating conditions. The specification values shown for this coal-based granular range are reference figures, and the batch value is confirmed before quotation. For a reliable match, send your air stream data, required outlet level, particle size and order quantity, and our team will check the appropriate grade and specification plan with you.