V_2O_5/TiO_2催化剂上甲苯气相氧化制苯甲醛  

Vapor-phase Oxidation of Toluene to Benzaldehyde over V_2O_5/TiO_2 Catalyst

作　　者：朱政斌[1] 杨赞 李立军 谢军 李安 ZHU Zhengbin;YANG Zan;LI Lijun;XIE Jun;LI An(College of Chemistry and Chemical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China)

机构地区：[1]湖南理工学院化学化工学院,湖南岳阳414006

出　　处：《湖南理工学院学报（自然科学版）》2018年第4期32-35,59,共5页Journal of Hunan Institute of Science and Technology(Natural Sciences)

摘　　要：采用浸渍法,制备出一系列不同负载量的V_2O_5/TiO_2催化剂;并采用XRD、FT-IR、N_2-物理吸附对催化剂结构进行表征.结果表明,适量的V_2O_5可较好地分散在TiO_2载体上,其中15%V_2O_5/TiO_2催化剂展现出更好的催化活性.在优化的工艺条件:反应温度为350℃,空速为2500h-1,n(air):n(toluene)=5:1,在15%V2O5/TiO2催化剂上,甲苯的转化率为7.3%,苯甲醛的选择性和收率分别为79.1%和5.8%.A series of V2O5/TiO2 catalysts with different loading content were prepared via impregnation method,and the catalysts were characterized by means of XRD、FT-IR、N2-physical absorption technology.The results showed that appropriate V2O5 species were highly dispersed on TiO2 supporter,and among them,the 15%V2O5/TiO2 catalyst showed a better catalytic activity.Under optimal reaction conditions,e.g.reaction temperature=350℃,GHSV=2500h^-1,n(air):n(toluene)=5:1;7.3%conversion of toluene was obtained,and 5.8%yield of benzaldehyde was achieved with 79.1%selectivity over the 15%V2O5/TiO2 catalyst.

关 键 词：甲苯 苯甲醛 二氧化钛 气相催化 

分 类 号：TQ39[化学工程]