化工进展

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掺杂铋助剂对钒磷氧催化剂性能的影响

高浩华,李春福,刘先明,席宗敬,康小平   

  1. 西南石油大学油气藏地质及开发工程国家重点实验室;吐哈天然气化工厂
  • 出版日期:2008-06-05 发布日期:2008-06-05

Effect of doping Bi promoter on performance of vanadium-phosphorous oxide catalysts

GAO Haohua,LI Chunfu,LIU Xianming,XI Zongjing,KANG Xiaoping   

  1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University;Tuha Natural Gas Chemical Plant
  • Online:2008-06-05 Published:2008-06-05

摘要: 通过在有机相法制备钒磷氧催化剂前体的过程中引入铋助剂,考察了不同n(Bi)/n(V)催化剂的催化性能。结果表明,当n(Bi)/n(V)=0.01时,催化剂(Bi0.01-VPO)的收率达到最大(42.6%),与没有掺杂铋助剂的催化剂(VPO)相比其转化率由31%提高到71%。采用BET、XRD、SEM、XPS分析手段,对催化剂(Bi0.01-VPO)与(VPO)进行比较分析,发现添加铋助剂改变了催化剂物相组成和微观形貌,使催化剂表面钒的平均氧化态和表面n(P)/n(V)比都有所升高,略微增大了催化剂的比表面积。

Abstract: Vanadium phosphorous oxide catalyst precursors were prepared in organic medium and with added Bi promoter. The catalytic performance of catalysts with different n(Bi)/n(V) were investigated. Experimental results showed that,when n(Bi)/n(V) was 0.01,the yield of this catalyst (Bi0.01-VPO) reached the highest 42.6%,its conversion was enhanced from 31% to 71% compared to non Bi-doped catalyst. By using BET,XRD,SEM and XPS techniques,comparative analysis was carried out between (Bi0.01-VPO) and (VPO). Specific surface area of catalyst(Bi0.01-VPO)was slightly increased,and the composition and microscopic appearance of catalyst phases changed by introducing the Bi promoter. Moreover,the oxidation state of catalyst surface vanadium species state and surface n(P)/n(V) were also higher.

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