高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (12): 1914.

• 论文 • 上一篇    下一篇

微波辐射下稀土交换ZSM-5分子筛的制备及裂解反应研究

常春, 张武阳, 张丽华, 李荣生, 田明文, 杨胥微, 侯莉   

  1. 吉林大学化学系, 长春, 130023
  • 收稿日期:1995-11-29 出版日期:1996-12-24 发布日期:1996-12-24
  • 通讯作者: 张武阳
  • 作者简介:常春,女,27岁,硕士研究生
  • 基金资助:

    国家稀土化学与物理开放实验室资助

Studies on Preparation of LaHZSM-5 by Microwave Technique and Its Cracking Properties

CHANG Chun, ZHANG Wu-Yang, ZHANG Li-Hua, LI Rong-Sheng, TIAN Ming-Wen, YANG Xu-Wei, HOU Li   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1995-11-29 Online:1996-12-24 Published:1996-12-24

摘要: 借助微波技术制备出一系列具有不同La3+交换度的LaHZSM-5样品。初步探讨了微波强度、微波作用时间及Si/Al比对交换度的影响。对其表面酸性的考察发现,样品均含有B酸和L酸中心,并且随La3+进入ZSM-5沸石的量的不同,强弱酸中心的强度与数量均有所改变。对样品催化性能的研究结果表明,催化活性与La3+含量及酸量呈顺变关系。

关键词: La3+交换ZSM-5分子筛, 微波技术, 表面酸性, 裂解反应

Abstract: Aseries of LaHZSM-5 samples with different La3+ exchange degrees were prePared by microwave technique. The effects of microwave power,exchang time and Si/Al ratio on La3+)exchange degree have been investigated.found that Bronsted and Lewis acid sites are present on the surfaces of samples. The strength and amount of the strong and weak acid sites are changed with different amount of La3+ added into ZSM-5 zeolites,The studies on catalytic properties show that the cracking activity is correlation to the amount of La3+ in samples.

Key words: La3+-exchanged ZSM-5 zeolite, Microwave technique, Surface acidity, Cracking reaction

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