不同方法制备的钒基催化剂对异丁烷脱氢性质的影响

不同方法制备的钒基催化剂对异丁烷脱氢性质的影响

马红超¹, 付颖寰¹, 王振旅², 朱万春², 吉定豪², 王国甲²

1. 大连工业大学化工与材料学院, 辽宁省大连 116034; 2. 吉林大学化学学院，长春 130021

收稿日期:2006-11-29 修回日期:1900-01-01 出版日期:2007-09-26 发布日期:2007-09-26
通讯作者: 马红超

Activities of Vanadiabased Catalysts Prepared with Different Methods for Dehydrogenation of Isobutane to Isobutene

MA Hongchao¹, FU Yinghuan¹, WANG Zhenlü², ZHU Wan chun², JI Dinghao², WANG Guojia²

1. School of Chemical and Material, Dalian Polytechnic University, Dalian 116034, Liaoning Province, China;2. College of Chemistry, Jilin University, Changchun 130021, China

Received:2006-11-29 Revised:1900-01-01 Online:2007-09-26 Published:2007-09-26
Contact: MA Hongchao

摘要/Abstract

摘要： 通过浸渍、共沉淀、浓缩结晶、水热和水热流体干燥法制备V-Al-O催化剂, 采用XRD,TPR,TPD和ESR等技术对催化剂的表面性质和结构进行表征. 结果表明, 制备方法影响催化剂表面钒物种的分散、还原能力、表面酸性和结构状态; 表面钒物种的分散度和活性位数量是影响异丁烷脱氢活性的主要因素; 催化剂表面Lewis酸量是影响异丁烯选择性的主要因素.

关键词: V-Al-O催化剂, 制备方法, 异丁烷, 脱氢

Abstract: The V-Al-O catalysts prepared via impregnating, co-precipitation, hydrothermal, concentration, and hydrothermal fluid drying, were characterized via XRD, TPR, TPD and ESR, etc. At the same time, they were compared with V₂O₅/γ-Al₂O₃ catalyst prepared via impregnation in the structure and dehydrogenation activities for dehydrogenation of isobutane to isobutene. It was found that the activities of the catalysts were obviously dependent on the preparation methods. The catalyst with large surface, surface enriched and well dispersedvanadia showed a higher dehydrogenation activity. Furthermore, the amount of Lewis acid on the surface of the catalyst was also an important factor to affect the selectivity of catalyst for isobutene.

Key words: V-Al-O catalyst, preparation method, isobutane, deh ydrogenation

中图分类号:

O643.3

马红超, 付颖寰, 王振旅, 朱万春, 吉定豪, 王国甲. 不同方法制备的钒基催化剂对异丁烷脱氢性质的影响[J]. J4, 2007, 45(05): 844-848.

MA Hongchao, FU Yinghuan, WANG Zhenlü, ZHU Wan chun, JI Dinghao, WANG Guojia. Activities of Vanadiabased Catalysts Prepared with Different Methods for Dehydrogenation of Isobutane to Isobutene[J]. J4, 2007, 45(05): 844-848.

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