Description
Activated carbon is obtained from coconut shell charcoal through physical or chemical activation processes. Coconut shell-based activated carbon is known for its micro-porous structure, high surface area, and excellent adsorption properties, especially for low molecular weight organic compounds.
The production involves two main steps:
Carbonization: Dried coconut shells are carbonized (pyrolyzed) in a controlled environment at high temperatures (600–900°C) to produce shell charcoal.
Activation: The charcoal is activated with steam at temperatures of 900–1100°C in a rotary kiln, creating a vast porous structure ideal for adsorption.
Coconut shell activated carbon is widely used for:
Water purification
Air filtration
Gold recovery
Solvent recovery
Food and pharmaceutical purification
Gas masks and respirators
Its superior hardness and low dust generation make it ideal for repeated use in filtering systems.
IS 2752:1995 Standards for Granular Activated Carbon
| Parameter | Value (Type 1) |
|---|---|
| Adsorption capacity (Carbon tetrachloride) | Min 55% |
| Moisture | Max 5% |
| Ash content | Max 5% |
| Hardness number | Min 90 |
| Iodine number (mg/g) | Min 900 |
| Surface area (m²/g) | Min 900 |
| Dechlorination value | Max 4 cm |
Production & Financial Details
| Detail | Value |
|---|---|
| Installed Capacity | 3 tonnes/day |
| Investment | ₹3.75 crore |
| Government Incentive | 25% of project cost (max ₹50 lakhs) |
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