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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/5470

Title: ACIDITY OF ZSM-5 ZEOLITES - A COMPARISON OF RESULTS OBTAINED USING DIFFERENT EXPERIMENTAL METHODS
Authors: SATYANARAYANA, CVV
CHAKRABARTY, DK
Keywords: hydroxyl-groups
oh groups
catalysts
disproportionation
ethylbenzene
conversion
alkylbenzenes
spectroscopy
sites
Issue Date: 1991
Publisher: COUNCIL SCIENTIFIC INDUSTRIAL RESEARCH
Citation: INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY, 30(5), 422-427
Abstract: Acidity of HZSM-5 zeolites with varying silica/alumina ratios has been studied by different techniques. Total acidity decreases with increase in silica/alumina ratio as expected, but the concentration of strong acid sites increases in the same direction. High temperature peak in TPD of ammonia alone does not account for total structural acidity. A linear relationship has been established between the concentration of moderately strong acid sites in ZSM-5 and its catalytic activity in EB disproportionation reaction. Infrared spectra of adsorbed pyridine on various zeolite samples indicate that strength of both Bronsted and Lewis acid sites increases with silica/alumina ratio, but Lewis acidity is generally weaker than Bronsted acidity.
URI: http://dspace.library.iitb.ac.in/xmlui/handle/10054/5470
http://hdl.handle.net/10054/5470
ISSN: 0376-4710
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