NaHY沸石中结构羟基与积碳的关系

高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (8): 738.

NaHY沸石中结构羟基与积碳的关系

李荣生¹, 张武阳¹, 刘军², 赵志明³

1. 吉林大学化学系;
2. 吉林大学理化所;
3. 长春师范学院

收稿日期:1984-03-10 出版日期:1985-08-24 发布日期:1985-08-24

Correlation Between the Coke Formation and Structural Hydroxyl in NaHY Zeolite

Li Rongsheng¹, Zhang Wuyang¹, Liu Jun², Zhao Zhiming³

1. Department of Chemistry, Jiliu University, Chagchun;
2. Institute of Theoretieal Chemistry, Jilin University, Changchun;
3. Changchun Teacher's College, Changchun

Received:1984-03-10 Online:1985-08-24 Published:1985-08-24

摘要/Abstract

摘要： Uylterhoevn和Ward等人已经证明了:1.NaHY沸石中的结构羟基,是NH₄NaY脱氨后余下的氢附连于邻近的骨架氧而形成的。对应红外光谱3643cm_-1吸收峰的结构羟基具有Brnsted酸性。

Abstract: In this article the correlation between the coke formation and structural hydroxyls in NaHYzeolite was investigated by using ESRtechnique in cumcne cracking, and the following were observed.1.With the pretrcatmcnt temperature of zeolite increasing the cumcne cracking activity decreased and the coke formation declined.2.Also with the calcination time being prolonged the cumcne cracking activity decreased and the coke formation declined.3.The higher the exchange degree of zeolite, the higher the cracking activity of zeolite and the more the coke formation.The tendency of changes of both the cracking activity and the coke formation was in accordance with that of changes of the amount of the structural hydroxyls in NaHYzeolite as function of the prctrcatment temperature, time and the exchange degree of zeolite. On those results above it was concluded that the coke formation was a secondary reaction for the cracking of cumene,that is, not only the structural hydroxyls in NaHYwere active sites for the cracking, but also for the coke formation.

TrendMD:

李荣生, 张武阳, 刘军, 赵志明. NaHY沸石中结构羟基与积碳的关系. 高等学校化学学报, 1985, 6(8): 738.

Li Rongsheng, Zhang Wuyang, Liu Jun, Zhao Zhiming. Correlation Between the Coke Formation and Structural Hydroxyl in NaHY Zeolite. Chem. J. Chinese Universities, 1985, 6(8): 738.