高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (3): 447.

• 论文 • 上一篇    下一篇

碱性探针分子在固体超强酸上的程序升温脱附研究

华伟明, 陈建民, 缪长喜, 高滋   

  1. 复旦大学化学系, 上海 200433
  • 收稿日期:1995-04-04 出版日期:1996-03-24 发布日期:1996-03-24
  • 通讯作者: 高滋
  • 作者简介:华伟明,男,26岁,博士研究生.
  • 基金资助:

    国家基础研究重大课题;中国石油化学工业总公司资助

Temperature Programmed Desorption of Basic Probes on Solid Superacids

HUA Wei-Ming, CHEN Jian-Min, LIAO Chang-Xi, GAO Zi   

  1. Department of Chemistry, Fudan University, Shanghai 200433
  • Received:1995-04-04 Online:1996-03-24 Published:1996-03-24

PDF (PC)

被引次数

10

摘要： 采用TCD和FID色谱检测器,对固体超强酸上吡啶、苯和甲苯的程序升温脱附过程进行了研究,并对液氮温度下收集的脱附产物进行了色谱-质谱分析。结果表明,吡啶、苯和甲苯等探针分子在固体超强酸上发生氧化反应,生成CO2和SO2,程序升温脱附数据与样品的酸性和正丁烷异构化反应活性之间并无对应关系。

关键词: 固体超强酸, 吡啶-TPD, 苯-TPD, 甲苯-TPD, 正丁烷异构化反应

Abstract: Temperature programmed desorption of pyridine, benzene and toluene from various solid superacids was studied by using both TCDand FIDdetectors.The desorbed gases were collected at liquid N2 temperature and analyzed with a mass-spectrometer.It was found that all these compounds are oxidized on the solid superacids,and CO2 and SO2 are found to desorb above 400～500℃ instead of the probes.The peak temperatures and areas on the temperature programmed desorption profiles of the probes from the solid superacids are not correlated with their acid strengths and n-butane isomerization activities.Tlie results verify that pyridine, benzene and toluene cannot be used as the basic probes for the characterization of solid superacids.

Key words: Solid superacid, Pyridine-TPD, Benzene-TPD, Toluene-TPD, Butane isomerization

TrendMD: