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《Chinese Journal of Catalysis》 2003-05
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Photocatalytic Regeneration of Coal-Based Activated Carbon

LIU Shouxin 1,2 , SUN Chenglin 1* , ZHANG Shirun 2 (1 Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2 Northeast Forestry University, Harbin 150040, Heilongjiang, China)  
The technical feasibility of photocatalytic regeneration for coal based activated carbon saturated with phenol was investigated in immobilized system by using TiO 2 and Ag TiO 2 as photocatalysts, and using UV lamp ( λ =253 7 nm) as irradiation source. The factors affecting the regeneration efficiency of the activated carbon were investigated, including photocatalyst modification, regeneration temperature, oxidant additive, adsorption regeneration cycles, and pH values. Based on the regeneration rate of activated carbon under different conditions, the regeneration mechanism was discussed. The effect of regeneration treatment on the pore structure of activated carbon was investigated by using N 2 adsorption isotherms. It is possible to regenerate the coal based activated carbon through photocatalytic oxidation. The phenol adsorption capacity of activated carbon with 1 9% (Ag TiO 2) loading can be recovered by 78 4%, when regenerated under the conditions of pH=13, θ =70 ℃ and t =72 h. The difference of phenol concentration between interior and exterior of activated carbon is the main driving force for photocatalytic regeneration.
【Fund】: 中国博士后科学基金资助项目 (2 0 0 2 0 3 2 174)
【CateGory Index】: O643.3
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