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应用科学学报 ›› 1998, Vol. 16 ›› Issue (1): 94-99.

• 论文 • 上一篇    下一篇

微波脱胺对β沸石酸性和结构的影响

杨兴斌, 何静, 李峰, 段雪, 王作新   

  1. 北京化工大学
  • 收稿日期:1996-10-01 修回日期:1997-01-20 出版日期:1998-03-31 发布日期:1998-03-31
  • 作者简介:杨兴斌:助教,北京化工大学应用化学系,北京 100029

De-Amine (Tetraethylammonium) Effects of Microwave on the Structure and Acidity of Zeolite β

YANG XINGBIN, HE JING, LI FENG, DUAN XUE, WANG ZUOXIN   

  1. Beijing University of Chemical Technology, Beijing 100029
  • Received:1996-10-01 Revised:1997-01-20 Online:1998-03-31 Published:1998-03-31

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85

被引次数

1

摘要： 采用TPDE、TPD和XRD等为主要实验手段,研究了微波对β沸石的脱胺效率及其对表面酸性和结构的影响.实验结果表明,在一定条件下,微波对β沸石脱胺有很高的效率.同常规脱胺相比较,β沸石经微波脱胺后,表面酸量明显增加,且表面出现了三个强度不同的酸性活性位,强酸位酸强度显著降低.晶相分析结果表明,微波脱胺可完好地保持β沸石的结晶度.

关键词: β沸石, 微波, 脱胺, 结晶度, 表面酸性

Abstract: The effects of the thermal decomposition of tetraethylammonium (template) by microwave on the surface acidity and structure of zeolite β are studied by TPDE,TPD and XRD. Results show that (1) the most part of template is eliminated after zeolite β has been irradiated for 40 minutes by microwave, (2) the surface acid amount evidently increases and β has three types of acidic sites which are of different strength, and (3) the strength of strong acid sites remarkly decreases compared with the traditional method. In addition, the method to remove the template can successfully maintain the crystallinity of zeolite β.

Key words: microwave, surface acidity, crystallinity, zeolite β, de-amine