V_2O_5/TiO_2催化剂上微波对甲苯选择氧化反应条件的影响  

The Influence of Microwave Energy on SeIective Oxidation of Toluene over V_2O_5/TiO_2

作　　者：刘晔[1] 刘蒲[1] 赵转云[1] 高润雄[1] 殷元骐[1] 

机构地区：[1]中国科学院兰州化学物理研究所,兰州730000

出　　处：《化学研究》1997年第4期6-8,共3页Chemical Research

摘　　要：在微波辐射条件下，考察了甲苯选择氧化过程中催化剂床层温度、O2／甲苯的比例、原料气总空速以及V2O5担载量等条件对TiO2催化剂活性的影响。实验结果表明，在微波作用下，当床层温度在250℃，O2／甲苯（摩尔比）＝6，原料气总空速：10000mLh－1时，在催化剂8％V2O5／TiO2（w）上苯甲酸的收率达到23％（w）．苯甲醛的收率达到9％（w）。与传统加热的催化过程相比．苯甲酸的收率明显提高。本文初步探讨了微波对催化剂活性的影响。Under microwaves irradiation, the effects of reaction bed temperature, O2/tolueneratio, the total space velocety(SV) of feed gas and the amount of V2O5/TiO2 loading were investigated over V2O5/TiO2 in the selective oxidation of toluene. It was found that when the reactionbed temperature was 250℃ ， O2/toluene was 6, the total SV was 10000h-1, and the amount ofV2O5 loading was 8 wt% , the catalytic activities of V2O5/TiO2 was most effective with 23wt%yield of benzoic acid and 9wt % yield of benzaldehyde. Compared to the conventional catalytic process, the much higher yield benzoic acid was obtained. The effects of microwave electromagneticfield on the catalysts were discussed tentatively.

关 键 词：甲苯 原料气 V2O5 收率 空速 选择氧化 催化过程 微波 影响 苯甲酸 

分 类 号：O643[理学—物理化学] TQ426[理学—化学]