煤质活性炭的光催化再生  

Photocatalytic Regeneration of Coal-Based Activated Carbon

作　　者：刘守新[1] 孙承林[1] 张世润[2] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]东北林业大学,黑龙江哈尔滨150040

出　　处：《催化学报》2003年第5期355-358,共4页

基　　金：中国博士后科学基金资助项目 (2 0 0 2 0 3 2 174)

摘　　要：研究了利用光催化氧化降解反应实现饱和吸附苯酚的煤质活性炭光催化再生的可行性 ,并分析了活性炭的光催化再生机理 .结果表明 ,在一定条件下可以实现活性炭的光催化再生 .在Ag TiO2 负载量为 1 9% ,pH =13,θ =70℃ ,t =72h的再生条件下 ,活性炭的再生率可达 78 4 % .在光照条件下 。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.

关 键 词：煤质活性炭 光催化再生 光催化氧化降解反应 吸附 苯酚 二氧化钛 银 

分 类 号：O643.3[理学—物理化学]