Coal-based granular activated carbon
Coal-Based Granular Activated Carbon for Air and Gas Filtration: Selection Guide for Iodine Value, Hardness and CTC Performance
Coal-based granular activated carbon is produced by high-temperature steam activation of selected coal, giving a dense, predominantly microporous material for air and gas filtration. Its granular form keeps pressure drop predictable in fixed beds while the pore network captures solvent vapours and odours. Compare grades using iodine value, BET surface area, CTC adsorption and hardness. Share your gas stream, flow rate, particle size and quantity, and we will confirm the applicable specification through our inquiry channel.
Compare iodine value, hardness and CTC performance, then confirm the batch specification before quotation.
- Iodine value
- 500 – 1100 mg/g
- Methylene blue adsorption
- ≥ 90 mg/g
- BET surface area
- 650 – 1000 m²/g
- Hardness
- ≥ 90 %
DESCRIPTION
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Coal-based granular activated carbon is a hard, dense material produced by high-temperature steam activation of selected coal. Its predominantly microporous structure gives it a strong affinity for volatile organic compounds, solvents and odors, while the granular form keeps pressure drop predictable in fixed-bed adsorbers. This makes it a practical choice for air and gas filtration where a broad range of organic vapors must be removed.
In service, the carbon works by physical adsorption: gas molecules migrate into the pore network and are held on the internal surface until the bed reaches saturation. Performance depends on how much surface is available, how well the pores match the molecules being removed, and how much contact time the bed allows. High iodine number and high BET surface area indicate greater adsorption capacity, while hardness matters because granular beds are backwashed, screened or reloaded.
What to Check Before Selecting a Grade
Pore profile and activity: iodine value and BET surface area indicate overall capacity, while CTC adsorption is more directly linked to solvent and gas-phase performance.
Mechanical strength: hardness and the required particle-size cut determine whether the grade holds up in your bed design.
Operating conditions: inlet concentration, gas flow and target outlet level set the contact time and the quantity of carbon needed.
Handling and storage: bulk density, moisture, ash and pH affect loading, pressure drop and equipment compatibility.
Because the same coal-based series is offered across a range of activity, hardness and sizing, matching grade to duty means comparing your gas stream with the batch data rather than choosing the highest figure on any single line. Send us the contaminant to be removed, expected concentration and flow rate, target outlet level, bed dimensions or contact time, required particle size and planned quantity, and we can review the application and confirm the applicable specification and terms through our inquiry channel.
SPECIFICATIONS
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Reference ranges for the coal-based granular series are shown below. Batch-specific values are confirmed before quotation, so select the grade that fits your duty.
| Iodine value | 500 – 1100 mg/g |
|---|---|
| Methylene blue adsorption | ≥ 90 mg/g |
| BET surface area | 650 – 1000 m²/g |
| Hardness | ≥ 90 % |
| CTC adsorption | 35 – 95 % |
| Ash content | 8 – 20 % |
| Moisture | ≤ 8 % |
| Bulk density | 0.5 – 0.65 g/cm³ |
| pH value | 7 – 11 |
| Particle size | 4 – 40 目 |
ADVANTAGES
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Why coal-based granular carbon suits air and gas filtration duties, and what to confirm before ordering.
Microporous structure suited to gas-phase adsorption
Coal-based activation develops a largely microporous network, a pore range that supports capture of solvent vapours and odorous molecules in air and gas streams.
Gas-phase pore range
High hardness for fixed-bed service
Granular grades are handled in packed beds where attrition and fines matter. The frozen hardness reference of 90% or above supports mechanical stability during filling and operation.
Hardness reference
Iodine value and CTC as selection anchors
The series spans 500 to 1100 mg/g iodine value and 35 to 95% CTC adsorption, giving buyers two measurable parameters to match against the contaminant load in their airflow.
Two measurable anchors
Grading matched to the vessel
Granular coal carbon is screened across a 4 to 40 mesh range, so the cut can be agreed against bed depth, pressure drop and dust tolerance before the order is placed.
Screening range
OUR COMMITMENTS
Six Reasons Industrial Buyers Trust Sanniu Carbon
What we can honestly commit to before and after an order: clarifying the duty in writing, stating the scope of our data, and confirming commercial terms with a person.
Application reviewed before a grade is proposed
We ask about the medium being treated, air or gas flow, target outlet condition and vessel type, then discuss which granular coal grade and mesh cut to consider.
Scope of referenced documents stated clearly
Specification ranges and the applicability of any referenced report are explained at quotation stage; batch values and the documents available for that batch are confirmed before the transaction.
Packing and moisture protection agreed on the order
Packaging format and moisture-control requirements are checked when the order is confirmed, so the agreed order information governs what is supplied. Bag size and labelling details can be settled at the same point.
Commercial terms confirmed by a person, not a table
Price, available quantity and delivery timing are verified manually and stand only once issued in a written quotation or order. No figure on this page should be read as a fixed offer.
Follow-up through the agreed contact channel
Questions on use or documentation after delivery are received and followed up through the contact channel arranged with you. Send the duty details with your inquiry so the reply can be specific.
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 options for granular coal carbon, agreed at order stage to suit the shipment and the receiving plant.
PE-lined bags for standard shipments
Granular carbon is supplied in bags with an inner liner that limits moisture pickup in transit, then stacked for container loading.
Inner-lined bag, palletised
Bulk bags for larger fixed beds
Larger units reduce manual handling and cut dust during filling of taller vessels. The exact fill weight is set when the order is confirmed.
Fill weight confirmed per order
Moisture-control packing for humid routes
For long or humid shipping routes, a desiccant or barrier layer can be agreed with the packing specification so the material arrives within its stated moisture limit.
Agreed per shipping route
Pallet and handling arrangements
Pallet type, stacking method and handling marks are confirmed with the order so unloading at your site matches the equipment available.
Agreed at order confirmation
Packing matched to the ordered mesh cut
Fine and coarse granular cuts can need different containment, so packing is matched to the agreed particle size range rather than a single standard.
Matched to ordered mesh cut
PROCESS
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A transparent, step-by-step inquiry and order workflow for coal-based granular activated carbon, so buyers know what information to prepare and what is confirmed in writing before shipment.
Send Your Inquiry with Application Details
Tell us the gas or air stream, target contaminants, flow or concentration, and required particle size, so the right coal-based granular grade can be discussed.
Review the Fitting Product Form and Grade
We check whether a granular, impregnated, or other form suits your service, and confirm which reference values apply to the intended duty.
Confirm Specifications and Documents
Quoted iodine value, hardness, CTC adsorption, and other indicators come from the frozen batch-relevant specification scheme and are agreed before order.
Approve Packaging and Order Terms
Packaging, moisture protection, quantity, price, and delivery are confirmed in the written quotation or order rather than assumed in advance.
Receive Support After Delivery
Through the agreed contact channel, we follow up on questions about handling, storage, or documents for the delivered activated carbon.
DIMENSIONS
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Coal-based granular activated carbon suits air and gas filtration where consistent adsorption and low pressure drop matter. The values below guide selection from the coal-based series.
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.
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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Common questions on selecting coal-based granular activated carbon for air and gas filtration, including grade ranges, particle size and document scope.
Which information is needed to select a coal-based granular activated carbon for air filtration?
We need the medium to be treated, the air or gas flow rate, the contaminant concentration, the target outlet specification and the required particle size. The operating temperature and whether the bed is fixed or moving also help confirm the grade. With these details we can match the appropriate granular grade and the agreed specification plan before pricing.
How do iodine value, hardness and CTC adsorption relate to air and gas filtration?
Iodine value indicates the development of micropores that support adsorption of smaller molecules. CTC adsorption gives an indication of capacity for solvent and gas-phase service, so it is often relevant when organic vapours are present. Hardness reflects resistance to attrition in a handled fixed bed, where dust formation and pressure drop are concerns. The coal-based series ranges are references; the batch value is confirmed before quotation.
Which particle size should be chosen for a granular activated carbon bed?
Particle size affects pressure drop, contact time and bed packing. Finer cuts give more surface contact but a higher pressure drop, while coarser cuts reduce pressure drop and may suit high-flow streams. Screening for the coal-based granular grades is 4 to 40 mesh, and the required cut is agreed before the order. Confirm the design flow and allowable pressure drop with your engineer so the cut suits the vessel.
Can the specification be adjusted to match our system requirements?
Specifications from the coal-based series are presented as ranges, including iodine value 500–1100 mg/g, methylene blue adsorption at least 90 mg/g, BET surface area 650–1000 m²/g, CTC adsorption 35–95%, ash 8–20%, moisture up to 8%, bulk density 0.5–0.65 g/cm³, pH 7–11 and hardness at least 90%. Where a value can be filled or a row omitted within the selected plan, we will discuss the available option. Final batch values are confirmed before quotation and order.
Which documents support a coal-based granular activated carbon order?
We can discuss the documents that apply to the specific product and transaction. The company holds ISO 9001:2015 / GB/T 19001-2016 certificate 06524Q01338R0S covering the sale of activated carbon. Sample RoHS reports B-R2409C3836 and A2260506150101001 apply to the tested samples only, and the UG SDS for Carbon, Activated, number 84309439, is dated 2024-05-29. No document is inferred beyond its stated scope.
What should we include in an inquiry for air filtration activated carbon?
Describe the medium, flow rate or concentration, target specification, particle size and quantity you have in mind. Mention any size, pressure drop or moisture requirement, and the documents you need. Price, available quantity and delivery are confirmed by a person, not by this page, and follow the written quotation or order. We will confirm the grade and the specification that applies before pricing.