高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (8): 851.

• 研究论文 • 上一篇    下一篇

温度对沸石酸性的影响

刘新生, 吴通好   

  1. 吉林大学合成与催化研究所
  • 收稿日期:1988-10-31 出版日期:1990-08-24 发布日期:1990-08-24
  • 通讯作者: 刘新生
  • 基金资助:

    国家自然科学基金

Effects of Temperature on Acidity of Zeolites

Liu Xinsheng, Wu Tonghao   

  1. Department of Chemistry, Jilin University, Changchun
  • Received:1988-10-31 Online:1990-08-24 Published:1990-08-24

PDF (PC)

被引次数

1

摘要： 用红外光谱研究温度对沸石酸性的影响,结果表明,温度使沸石表面酸性(酸强度)增强,酸性增强的规律是大孔道或大孔腔中的酸性羟基>表面硅醇基(或缺陷羟基)>小笼中的酸性羟基,在所研究的温度范围内(290～510K)酸性随温度的变化呈线性关系。

关键词: 红外光谱, 温度, 酸性, Y型沸石, ZSM-5

Abstract: Effects of temperature on the acidity of zeolites were studied by using IRspectrometry. The experimental results show that the acidities (acid strength) of the zeolites are increased as temperature increases. The increase of the acidities of the diffrent -OH groups has the following order: acidic -OHgroups located in the big cavities (supercages in the zeolite Y and main channels in the ZSM-5) > Si-OH on the external surface or on the defect positions > acidic -OH groups located in the small cages (D-6 membered rings in the zeolite Y), The changes of the acidities are linear with increasing temperature over the temperature range employed in the study.

Key words: Infrared spectra, Temperature, Acidity, Y type zeolite, ZSM-5

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