Overview
Activated carbon adsorbent is a processed carbon material with an exceptionally high surface area and porosity, making it ideal for adsorption applications. It is produced through thermal or chemical activation of carbon-rich materials like coconut shells, wood, or coal. Industrial-grade activated carbon is classified by its raw material (e.g., coal-based, coconut shell-based) and activation method. The adsorption capacity is quantified by parameters like iodine number (600–1,200 mg/g) and methylene blue value, which buyers should verify for specific applications.
Physical and Chemical Properties
The material's effectiveness stems from its extensive network of micropores (diameter <2 nm), mesopores (2–50 nm), and macropores (>50 nm). Surface area typically ranges from 500 to 1,500 m² per gram, with higher values indicating greater adsorption potential. Activated carbon is chemically inert under most conditions but can react with strong oxidizers. Its electrical conductivity and thermal stability (up to 300°C in air) make it suitable for diverse industrial processes. Particle size distribution (0.5–4 mm for granular types) significantly impacts flow characteristics in filtration systems.
Main Applications
In water treatment, activated carbon removes organic contaminants, chlorine, and odors in municipal and industrial systems. The food/beverage industry uses it for decolorization and purification of syrups, sweeteners, and alcoholic beverages. Air purification applications include VOC removal in manufacturing facilities and mercury capture in coal-fired power plants. Specialty uses encompass pharmaceutical purification, gold recovery in mining (CIP process), and catalyst support in chemical reactions. Reactivation through thermal treatment allows for multiple usage cycles in some applications.
Safety and Storage
As a combustible dust, activated carbon requires storage away from ignition sources and proper grounding during transfer. NFPA ratings classify it as Health: 1, Flammability: 1, Reactivity: 0. Containers should be sealed to prevent moisture absorption, which reduces effectiveness. Personnel handling powdered forms need PPE including N95 respirators and protective eyewear. Spills should be cleaned with non-sparking tools. In confined spaces, monitor oxygen levels as carbon can deplete oxygen through adsorption. Always consult SDS for grade-specific precautions.
B2B Procurement Guide
Specify technical parameters: iodine number (600–1,200 mg/g for most applications), particle size (mesh size), ash content (<5% for food-grade), and moisture content (<5%). Coal-based grades offer cost efficiency, while coconut shell variants provide superior pore structure for certain applications. Consider packaging options (bulk bags, drums) and logistics requirements. For large-scale users, evaluate supplier reactivation services. Lead times vary from 2–8 weeks for specialty grades. Always request certified test reports for each batch, including CTC (carbon tetrachloride) activity for vapor-phase applications.
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