Coconut Shell Activated Carbon for Oil Decolorization

Coconut shell activated carbon decolorizes oil by adsorption. Its fine pore structure and large surface area pull the colour bodies, pigments, colloids, odours and organic impurities out of the oil, so the refined product comes out clearer and more stable. It is used to decolorize edible oils, biodiesel and mineral oils, run as a bed of granules or mixed in as a fine grade, and its low ash and low dust keep the oil clean and the process steady.

We supply this coconut shell grade at a high iodine value of 900 to 1100 mg/g, with a methylene blue value of 120 to 240 mg/g and a surface area of 900 to 1200 m²/g — the numbers that set its adsorption capacity. Iodine value tracks the fine pores that take small molecules, while methylene blue value tracks the larger pores that take colour bodies. We can supply other iodine grades and mesh sizes to match the duty, so tell us the oil and the colour target you need to hit.

Coconut shell carbon has a harder, denser structure and a higher share of fine pores than coal- or wood-based carbon, which gives it a high iodine value, strong adsorption, high hardness and low dust. That hardness lets it hold up in continuous beds and reactivate well, and being made from a renewable shell it is a cleaner raw material. Coal carbon suits some bulk gas and water duties, and wood carbon takes very large colour molecules, but for clean, hard, high-iodine decolorizing carbon, coconut shell is the usual choice.

The carbon comes in a range of mesh sizes — 4×8, 6×12, 8×30, 12×40, 30×60 and 60×80 — alongside finer granular grades, so the size is matched to the bed or the mixing step. It ships in 25 and 50 kg bags, in one-tonne bulk bags, or packed as you require. Give us the mesh and the volume and the packing comes back on the quote.

Yes. Coconut shell carbon is hard and holds its structure, so once it is loaded with colour and impurities it can be thermally reactivated — heated to drive off the adsorbed material — and used again over several cycles, which lowers the cost for each tonne of oil treated. When it is finally spent, it is easily replaced. Tell us your process and we will advise on handling and reactivation intervals.