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Determination of the Acidity of Montmorillonite Pillared with Aluminum by IR Using Pyridine Adsorption

 

作者: C. Pesquera,   F. González,   I. Benito,   C. Blanco,   S. Mendioroz,  

 

期刊: Spectroscopy Letters  （Taylor Available online 1992）
卷期: Volume 25, issue 1  

页码: 23-30

 

ISSN:0038-7010

 

年代: 1992

 

DOI:10.1080/00387019208020753

 

出版商: Taylor & Francis Group

 

关键词: Pillaring;Montmorillonite;Acid sites;Pyridine;Infrared spectroscopy

 

数据来源: Taylor

 

摘要:

Spectroscopic studies of chemisorbed pyridine indicate that Na-montmorillonite which has been degassed at 200°C contains only Lewis acid sites. The reaction of Na-homoionic montmorillonite with Al polyoxycations generates pillared montmorillonite which is thermally stable up to 500°C. The pillaring process seems to enhance Lewis acid sites and generate Brönsted acid sites. Above 300°C pyridine is adsorbed mainly on Lewis centers.

 

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