Activated carbon is made from such raw materials as charcoal, chips and different kinds of nutshells, pits or high-quality coal. It appears to be black, tasteless, nontoxic absorbent after a serial of physical and chemical processions including carbonation, activation, acid cleaning and rinse. It involves both physical and chemical adsorption with a large specific area up to 600-2000m2/g, and three types of mesopore distribution including macropore (effective radius is over 1000 oA); transition (effective radius is 100-200 oA); micropore (effective radius is under 20 oA). These characteristics make it possible to select to absorb matters of micro and macro molecular in gas and liquid phase for crocking, refinement, deodorization, sterilization and decontamination. As a good absorbent, activated carbon is essentially used in industries of food, pharmacy, chemistry, water treatment, environment-protection, national defense and agriculture. After decades of application in market, activated carbon industry has formed a independent and complete system with prosperous development and widely potential market. |
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