高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (3): 448.

• 论文 • 上一篇    下一篇

WO3/ZrO2固体强酸催化剂上异丁烷-丁烯烷基化反应研究(Ⅰ)──钨负载量和焙烧温度的影响

孙闻东, 赵振波, 楚文玲, 郭川, 叶兴凯, 吴越   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1999-04-20 出版日期:2000-03-24 发布日期:2000-03-24
  • 通讯作者: 吴　越(1926年出生),男,研究员,博士生导师,主要从事催化研究.
  • 基金资助:

    国家自然科学基金(批准号:29792076)九·五重大项目

Studies on the Alkylation of Isobutane with Butene over WO3/ZrO2 Strong Solid Acid(Ⅰ)──Effect of Preparation, Load of WO3 and Calcination Temperature

SUN Wen-Dong, ZHAO Zhen-Bo, CHU Wen-Ling, GUO Chuan, YE Xing-Kai, WU Yue   

  1. Changchun Institute of Applied Chemistry, The Chinese Academy of Sciences, Changchun 130022, China
  • Received:1999-04-20 Online:2000-03-24 Published:2000-03-24

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摘要： 制备了系列WO3/ZrO2固体强酸催化剂,用XRD,DTA-TG,H2-TPR,Raman光谱和酸性测定等方法测定其晶型结构、表面状态和酸性.结果表明,WO3/ZrO2中的ZrO2基本以T晶相存在,WO3对稳定T晶相有重要作用,样品具有较大的表面积.分散于ZrO2表面上的WO3主要以单层分散和析出的WO3晶粒形式存在,部分可能与ZrO2作用形成Zr—O—W键并起强酸作用.研究了各种实验条件下的异丁烷-丁烯烷基化反应.与其它固体酸相比,具有较高的起始活性和#em/em#-C80选择性,且与酸强度和酸量有较好的对应关系.

关键词: WO3/ZrO2, 固体强酸, 异丁烷-丁烯烷基化

Abstract: Aseries of WO3/ZrO2 strong solid acid prepared under different conditions were studied. Their crystal structures, surface properties and acidities were determined by means of XRD, DTA TG, H2 TPR, Laser Raman and acidity measurements. The results revealed that ZrO2 in WO3/ZrO2 existed mainly in tetragonal phase, the addition of WO3 plays an important role to stablize tetragonal phase of ZrO2 and thus the catalyst had a considerable surface area. WO3 in WO3/ZrO2 was dispersed and crystalized in WO3 crystalite on ZrO2 surface and partly reacted with ZrO2 to form the bond of Zr—O—W, which acts as the strong solid acid site. The catalytic properties of WO3/ZrO2 strong solid acid for alkylation of iso-butane with butene under the different conditions were investigated. They had a better reaction performance than other strong solid acids, a parallel relationship could be drawn between the catalytic activity and the amount of acid sites as well as the acidic strength of the catalysts.

Key words: Strong solid acid, Isobutane/butene, Alkylation, WO3/ZrO2

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