Activated carbon is porous carbon material. Due to highly developed porous structure and huge specific surface area, it has very strong adsorption capacity, which is widely used in industrial production, agriculture environmental protection as catalyst or catalyst carrier. Coal-based activated carbon for solvent recovery is mainly used for separation and recovery of organic solvent and vapor, such as ether, ketone, alcohol, tetrahydrofuran, methane dichloride, chloroform, trichlorethylene, carbon disulfide, benzene, toluene, gasoline, and hydrocarbon.