Adsorption of pyridine on dealuminated zeolite HY

H. C. Wang; H. Paul Wang; Kuen Song Lin

doi:10.1080/10934529909376933

Adsorption of pyridine on dealuminated zeolite HY

H. C. Wang, H. Paul Wang, Kuen Song Lin

Department of Environmental Engineering

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

Infrared spectra showed that over 80% of aluminum atoms on the surface of zeolite HY were extracted by a exposure of SiCl₄ vapor at elevated temperatures. The dealumination of the HY surface resulted in an appreciable change in its acidic properties. Infrared spectra of adsorbed pyridine indicated the formation of various kinds of Lewis acid sites on the delauminated HY surfaces. Although the total number of the surface Bronsted acid site decreased in the SiCl₄-induced dealumination process, the nature of these remaining Bronsted acid sites was unchanged spectroscopically.

Original language	English
Pages (from-to)	1849-1858
Number of pages	10
Journal	Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume	34
Issue number	9
DOIs	https://doi.org/10.1080/10934529909376933
Publication status	Published - 1999 Jan 1

All Science Journal Classification (ASJC) codes

Environmental Engineering

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abstract = "Infrared spectra showed that over 80% of aluminum atoms on the surface of zeolite HY were extracted by a exposure of SiCl4 vapor at elevated temperatures. The dealumination of the HY surface resulted in an appreciable change in its acidic properties. Infrared spectra of adsorbed pyridine indicated the formation of various kinds of Lewis acid sites on the delauminated HY surfaces. Although the total number of the surface Bronsted acid site decreased in the SiCl4-induced dealumination process, the nature of these remaining Bronsted acid sites was unchanged spectroscopically.",

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AU - Wang, H. C.

AU - Wang, H. Paul

AU - Lin, Kuen Song

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N2 - Infrared spectra showed that over 80% of aluminum atoms on the surface of zeolite HY were extracted by a exposure of SiCl4 vapor at elevated temperatures. The dealumination of the HY surface resulted in an appreciable change in its acidic properties. Infrared spectra of adsorbed pyridine indicated the formation of various kinds of Lewis acid sites on the delauminated HY surfaces. Although the total number of the surface Bronsted acid site decreased in the SiCl4-induced dealumination process, the nature of these remaining Bronsted acid sites was unchanged spectroscopically.

AB - Infrared spectra showed that over 80% of aluminum atoms on the surface of zeolite HY were extracted by a exposure of SiCl4 vapor at elevated temperatures. The dealumination of the HY surface resulted in an appreciable change in its acidic properties. Infrared spectra of adsorbed pyridine indicated the formation of various kinds of Lewis acid sites on the delauminated HY surfaces. Although the total number of the surface Bronsted acid site decreased in the SiCl4-induced dealumination process, the nature of these remaining Bronsted acid sites was unchanged spectroscopically.

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