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Enhanced Catalytic Performances by Desilication and Subsequent Steam Treatment of ZSM-5 Zeolite

Published online by Cambridge University Press:  10 February 2011

R. Le Van Mao ,
N. Borsuk ,
D. Ohayon ,
A. Ramsaran ,
S. T. Le  and
G. Denes
R. Le Van Mao
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal (Quebec) H3G 1M8 Canada
N. Borsuk
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal (Quebec) H3G 1M8 Canada
D. Ohayon
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal (Quebec) H3G 1M8 Canada
A. Ramsaran
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal (Quebec) H3G 1M8 Canada
S. T. Le
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal (Quebec) H3G 1M8 Canada
G. Denes
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal (Quebec) H3G 1M8 Canada
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Abstract

Controlled desilication of ZSM-5 zeolite increases the acid site density of its acid form. A subsequent treatment with steam at 300 °C results in a material with single-sized and slightly larger micropores when compared to the parent zeolite. This is likely the cause of a second increase of the yields of MTBE (methyl terbutyl ether) and ethylene when the steamed desilicated zeolite is used as catalyst in the MTBE synthesis and ethanol dehydration, respectively. Steam appears to be capable of “healing” the zeolite framework at a temperature much lower than that normally required when the desilicated ZSM-5 zeolite is solely heated in air.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 454: Symposium S – Advanced Catalytic Materials–1996 , 1996 , 73
Copyright
Copyright © Materials Research Society 1997

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References

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