| 王翔,周烈华,罗孟飞,袁贤鑫,陈平.甲苯气相选择性氧化制苯甲醛 Ⅰ．V_2O_5／TiO_2－Al_2O_3催化剂研究[J].分子催化(中英文),1995,(5): |
| 甲苯气相选择性氧化制苯甲醛 Ⅰ．V_2O_5／TiO_2－Al_2O_3催化剂研究 |
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| DOI： |
| 中文关键词: 甲苯，选择性氧化，苯甲醛，钒基氧化物催化剂 |
| 英文关键词:Selective oxidation,Toluene, Benzaldehyde,Vanadium oxide catalyst. |
| 基金项目: |
| 王翔 周烈华 罗孟飞 袁贤鑫 陈平 |
| 杭州大学催化研究所，杭州大学化学系 |
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| 中文摘要: |
| 制备了一系列负载型Ｖ－Ｔｉ－Ａｌ－Ｏ催化剂并用于甲苯的气相选择性氧化制苯甲醛，考察了接触时间、氧浓度、Ｖ２Ｏ５负载量以及催化剂焙烧温度对反应性能的影响。用ＴＰＲ、ＸＲＤ和ＢＥＴ等测试手段，对催化剂进行了表征。研究发现，催化剂在７７３Ｋ时活化，接触时间１．２秒，氧浓度２１％时，可获得较好的反应结果，Ｖ２Ｏ５负载量为６（ｗｔ）％的催化剂，在５９３Ｋ时反应，得到了转化率２０．５％，苯甲醛产率８．３％的最好结果。 |
| 英文摘要: |
| A series of V2O5 catalysts supported on TiO2-Al2O3 were prepared and applied to vapour phase Catalytic oxidation of toluene to benzaldehyde. The effects of space velocity, oxygen concentration,amount of supported V2O5 and the calcine temperature of Catalysts were investigated. TPR, XRD and BET measurements were made to study the performance of the catalysts. It has been found that 1.2s of contacting time, 21% volumetric oxygen concentration and 773K of calcination temperature were the optimal conditions for this reaction, When catalysts of 6% V2O5 supported on TiO2-Al2O3 was used, the best result of 20.5% toluene convension, 8.3% benzaldehyde yield could be obtained at reaction temperture 593K. |
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