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

Chem. J. Chinese Universities ›› 1996, Vol. 17 ›› Issue (12): 1914.

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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

Department of Chemistry, Jilin University, Changchun, 130023

Received:1995-11-29 Online:1996-12-24 Published:1996-12-24

Abstract

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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CHANG Chun, ZHANG Wu-Yang, ZHANG Li-Hua, LI Rong-Sheng, TIAN Ming-Wen, YANG Xu-Wei, HOU Li. Studies on Preparation of LaHZSM-5 by Microwave Technique and Its Cracking Properties[J]. Chem. J. Chinese Universities, 1996, 17(12): 1914.

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

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