物理化学学报 >> 1993, Vol. 9 >> Issue (06): 827-831.doi: 10.3866/PKU.WHXB19930620

研究简报 上一篇    下一篇

(NH4)2SiF6脱铝八面沸石酸性和1-已烯结碳研究

栾兆华; 张盈珍; 郑禄彬   

  1. 中国科学院大连化学物理研究所,大连 116023
  • 收稿日期:1992-04-06 修回日期:1992-08-25 发布日期:1993-12-15
  • 通讯作者: 张盈珍

A Study on Acidity and Coking Activity of (NH4)2SiF6 Dealuminated Faujasites

Luan Zhao-Hua; Zhang Ying-Zhen; Zheng Lu-Bin   

  1. Dalian Institute of Chemical Physics, Chinese Acadmey of Sciences, Dalian 116023
  • Received:1992-04-06 Revised:1992-08-25 Published:1993-12-15
  • Contact: Zhang Ying-Zhen

关键词: 沸石, 脱铝, 结碳

Abstract: Acidity and coking activity of(NH_4)_2SiF_6 dealuminated faujasites have been investigated by means of infrared spectroscopy. Results show that with the increasing framework Si/Al ratio of (NH_4)_2SiF_6 dealuminated Faujasties, (1) Pyridine can interact gradually with the OH groups in the small cavites, while partial OH groups in supercages can not interact with pyridine, (3) the amount of bronsted acid sites dcreases, while the amount of its strong part increases. There is no Lewis acid essentially, (4) the coking rate and coke quantity both decrease, which is in consistent with the acidity of faujasites determined by pyridine.

Key words: Faujasites, Dealumination, Coke formation