甲苯气相选择氧化制苯甲醛　Ⅱ．V_2O_5／TiO_2催化剂焙烧温度和反应条件探讨

Vapor Phase Catalytic Oxidation of Toluene to Benzaldehyde Ⅱ. The Investigation of Calcination Temperature of V_2O_5/TiO_2 Catalysts and Reaction Conditions

利用ＢＥＴ、ＸＲＤ、Ｈ_２－ＴＰＲ、Ｏ_２－ＴＰＤ－ＭＳ等测试手段，并结合化学分析方法，研究了焙烧温度对Ｖ_２Ｏ_５／ＴｉＯ_２催化剂结构和性能的影响．同时探讨了Ｖ_２Ｏ_５／ＴｉＯ_２催化剂上较适合于甲苯气相选择氧化的氧浓度和空速．结果表明，催化剂在７７３Ｋ活化，氧浓度７％，空速１４，０００ｈ^（－１）时效果较好．

The effect of calcination temperature on the structure and property of V2O5/TiO2 catalysts are studied by physicochemical methods, such as BET, XRD, H2-TPR and O2-TPD-MS, together with chemical analysis of catalysts. Simultaneously, suitable O2 content and space velocity for vapor phase selective oxidation of toluene are investigated. It shows that the best conditions for this reaction are 773 K of calcination temperature. 7% O2content and 14, 000 h-1 of space velocity.