若干稀土Y分子筛催化剂的酸性与活性、积碳关系的初步研究

高等学校化学学报 ›› 1984, Vol. 5 ›› Issue (3): 401.

若干稀土Y分子筛催化剂的酸性与活性、积碳关系的初步研究

李荣生, 张武阳, 宋瑞芳

吉林大学化学系

收稿日期:1982-12-10 出版日期:1984-06-24 发布日期:1984-06-24

CORRELATION BETWEEN ACIDITY AND ACTIVITY OF RARE-EARTH EXCHANGED Y ZEOLITE CRACKING CATALYSTS AND OTHER SOLID ACIDS

Li Rongsheng, Zhang Wuyang, Song Ruifang

Department of Chemistry, Jilin University, Changchun

Received:1982-12-10 Online:1984-06-24 Published:1984-06-24

摘要/Abstract

摘要： 为了探讨什么样的酸中心是裂解活性中心,本文以四种稀土Y分子筛裂解催化剂和其它固体酸为对象,研究了表面酸性与裂解活性、积碳的关系。

Abstract: Taking cracking of cumene as the model reaction and using Hammett indicator method, high temperature ammonia adsorption method and ESRtechnique, we have studied primitively the correlation between activity, coking and acidity of 4 rare-earth exchanged Yzeolite cracking catalysts and other solid acids.From our results can be seen:1. More active sites of catalysts are favorable to coking, leading their faster deactivation.2. For cracking of cumene at 250℃ the active sites which make contribution to cracking activity seem to be.Sites whose range of strength is H₀≤5.6, according to Hammett indicator method;Sites whose range of desorption temperature is T>250℃, according to high temperature ammonia adsorption method.

TrendMD:

李荣生, 张武阳, 宋瑞芳. 若干稀土Y分子筛催化剂的酸性与活性、积碳关系的初步研究. 高等学校化学学报, 1984, 5(3): 401.

Li Rongsheng, Zhang Wuyang, Song Ruifang . CORRELATION BETWEEN ACIDITY AND ACTIVITY OF RARE-EARTH EXCHANGED Y ZEOLITE CRACKING CATALYSTS AND OTHER SOLID ACIDS. Chem. J. Chinese Universities, 1984, 5(3): 401.