Activated carbon can be produced by physical vapor method and chemical method according to the production method. This paper emphasizes the production of physical vapor method. Generally, production is divided into two processes. The first step is carbonization. The raw material is dried at 170-600 temperature and 80% r organic tissue is carbonized at the same amount. The second step, activation, the first step has been carbonized carbonized into the reactor, react with activator and steam, complete its activation process, made into finished products.
During the endothermic reaction, CO and H2 combined gases are mainly produced to heat the carbonized materials to appropriate temperatures (800 to 1000 degrees) to remove all their decomposable substances, resulting in rich pore structure and huge specific surface area, so that the activated carbon has a strong adsorption. Activated carbon produced from different raw materials has different pore sizes, of which the coconut shell activated carbon has the smallest pore size, and the lignin activated carbon has the larger pore size. The pore size of coal activated carbon is between the two. Activated carbon pore size is generally divided into three categories: macropore: 1000-1000000A transition pore: 20-1000A micropore: 20A according to the above characteristics can be seen, according to different adsorption objects, the need to select the appropriate activated carbon, in order to achieve the best cost performance ratio, therefore, generally in the liquid phase adsorption, should choose more transition pore size and average pore size is larger. Activated carbon.
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