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Production of Porous Materials by Dealumination of Alumina-Rich Zeolites

Published online by Cambridge University Press:  28 February 2011

R. Le Van Mao ,
G. Denes ,
N.T.C. Vo ,
J.A. Lavigne  and
S.T. Le
G. Denes
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal, Quebec, CanadaH3G 1M8
N.T.C. Vo
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal, Quebec, CanadaH3G 1M8
J.A. Lavigne
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal, Quebec, CanadaH3G 1M8
S.T. Le
Affiliation:
Concordia University, Department of Chemistry and Biochemistry, Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal, Quebec, CanadaH3G 1M8
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Abstract

A comparative study of chemical and textural properties for materials obtained by three different methods of dealumination of alumina-rich parent Ca-A zeolite showed that the method using ammonium hexafluorosilicate (AFS) resulted in the most interesting developments of mesoporous materials, with much higher void volumes and cation exchange properties than obtained by acid leaching or hydrothermal treatment. AFS treatment on both the Na and Ca forms of zeolite A resulted in materials with 12 nm sized mesopores, whereas smaller mesopores of about 4 nm were obtained when using the higher Si/Al ratio parent zeolite Na-X. Pore size distribution profiles obtained for these new materials are fairly narrow, indicating homogeneous mesopore sized solids.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 371: Symposium W1 – Advances in Porous Materials , 1994 , 123
Copyright
Copyright © Materials Research Society 1995

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