Coal-Based Granular Activated Carbon for Water and Air Treatment | Sanniu Carbon

Coal-based granular activated carbon is made from selected coal, formed into granules and activated by high-temperature steam to open a network of pores. That structure gives the material a broad internal surface for adsorbing dissolved organics, colour, odour, chlorine and a range of volatile compounds. Because it is granular rather than powdered, it suits fixed beds and filters where water or gas passes through a settled layer of carbon.

Where It Fits

In water treatment the granules hold organic load, taste and odour compounds, and can be used in pressure vessels, open filters or polishing stages. In air and gas treatment the same granular form serves odour control, solvent vapour and other volatile organic compounds in packed beds or extraction systems. Coal-based grades are often chosen because the hard, dense granules resist attrition well and take up less volume for the same bed.

Reading the Numbers

Capacity is usually judged from iodine value and methylene blue adsorption, which reflect the pore surface available to small and medium molecules. CTC adsorption guides gas-phase work, while hardness and bulk density show how the bed behaves in service.

Selection Considerations

• Define the stream: what is being removed, at what concentration and flow, and whether the phase is liquid or gas.

• Match granule size to the vessel and acceptable pressure drop; finer granules adsorb faster but raise flow resistance.

• Confirm that temperature and pH fall within the range the grade was designed for.

• Treat published values as a series reference; the batch certificate is the figure that matters before a quotation is confirmed.

To move forward, send the treatment objective, flow or air rate, target outlet figure, preferred particle size and planned quantity. We can then discuss which granular coal-based grade is worth testing and confirm batch values and available documents before an order is placed.