高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (4): 545.

• 研究论文 • 上一篇    下一篇

LaHZSM-5沸石的制备及其裂解性能研究

李荣生1, 温瑞武1, 张武阳1, 魏诠2   

  1. 1. 吉林大学化学系, 长春 130023;
    2. 吉林大学分析测试中心
  • 收稿日期:1992-05-17 修回日期:1992-07-18 出版日期:1993-04-24 发布日期:1993-04-24
  • 通讯作者: 李荣生
  • 基金资助:

    国家稀土化学与物理开放实验室资助

Investigation of Preparation and Catalytic Cracking Property of LaHZSM-5 Zeolite

LI Rong-Sheng1, WEN Rui-Wu1, ZHANG Wu-Yang1, WEI Quan2   

  1. 1. Derartment of Chemistry, Jilin University, Changchun, 130023;
    2. Analysing and Testing Center, Jilin University, Changchun
  • Received:1992-05-17 Revised:1992-07-18 Online:1993-04-24 Published:1993-04-24

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被引次数

5

摘要： 用常压和水热法制备了具有不同交换度的LaHZSM-5沸石,以XPS、IR、XRD及正十五烷裂解对其进行了表征。结果表明,水热法可获得较高交换度的LaHZSM-5沸石。La3+交换的沸石较相同Si/Al比的HZSM-5沸石活性高,对气体的选择性降低,提高了C5～10馏分的选择性。

关键词: ZSM-5沸石, La3+交换, 裂解, 稀土

Abstract: In this paper LaHZSM-5 zeolites with varying exchange degree were prepared by the conventional and the hydrothermal liquid-solid exchange.The prepared LaHZSM-5 zeolites were characterized by XPSand IRspectroscopy, X-ray diffraction as well as the cracking of pentadecane.The results show that the LaHZSM-5 zeolite samples with higher exchange degree can be prepared by the hydrothermal exchange.LaHZSM-5 zeolite has a higher cracking activity than HZSM-5 zeolite.After the incorporation of La by exchange, the selectivity for gas is decreased and the selectivity for C5-10 is increased.In addition, the hydrothermal stability of the activity of ZSM-5 zeolite is also enhanced owing to the incorporation of La ion by exchange.

Key words: ZSM-5 zeolite, La3+ exchange, Cracking, Rare earth

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