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Gas activation process is activated gas and C using redox reaction, erosion surface carbide, while removing the tar-like substance and not charcoals, carbonized material so fine pore structure developed in the process. Through gasification reaction, the carbonized material originally occluded pore opening, expanding existing porosity and pore wall LOI, certain structures generated by selective activation process for new holes. Pore formation and the degree of oxidation is closely related to C, in a certain range of the activation rate of LOI, the degree of activation of the gasification gas and the reaction deeper the carbonized material to produce activated carbon, the greater the specific surface area, pore becomes more developed, the activated carbon adsorption performance better. 

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