高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (6): 909.

• 论文 • 上一篇    下一篇

引入SiO2对SO42-/ZrO2超强酸体系的影响

张锋, 华伟明, 高滋   

  1. 复旦大学化学系, 上海 200433
  • 收稿日期:1998-09-11 出版日期:1999-06-24 发布日期:1999-06-24
  • 通讯作者: 高滋
  • 作者简介:张锋,男,26岁,硕士研究生
  • 基金资助:

    国家基础研究重大项目资助

Influence of Adding SiO2into ZrO2on SO42-/ZrO2Solid Superacid

ZHANG Feng, HUA Wei-Ming, GAO Zi   

  1. Department of Chemistry, Fudan University, Shanghai, 200433
  • Received:1998-09-11 Online:1999-06-24 Published:1999-06-24

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摘要： 用共沉淀法和负载法制备了一系列SO42-/ZrO2-SiO2催化剂,详细研究了添加SiO2对SO42-/ZrO2超强酸样品的晶化、比表面、硫含量、超强酸性和异丙苯裂解及异丙醇脱水反应的影响.引入SiO2会延迟ZrO2的晶化和晶相转变,减弱SO42-/ZrO2体系的超强酸性,但对提高样品的异丙苯裂解和异丙醇脱水反应活性有利.

关键词: 固体超强酸性, SO42-/ZrO2, SO42-/ZrO2－SiO2

Abstract: Aseries of SO42-/ZrO2SiO2catalysts with different SiO2amount were prepared by coprecipitation and coating methods. The effect of adding SiO2into ZrO2on the crystallization, surface area, sulfur content, superacidity of SO42-/ZrO2and cumene cracking and iso-propanol dehydration was studied in detail. Adding SiO2into ZrO2retarded the crystallization and phase transformation of ZrO2, and decreased solid superacidity of SO42-/ZrO2, but enhanced the catalytic activities of SO42-/ZrO2for cumene cracking and isopropanol dehydration.

Key words: Solid superacidity, SO42-/ZrO2, SO42-/ZrO2SiO2

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