Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 169, Issue -, Pages 128-136Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2012.10.011
Keywords
Faujasite; Propyl sulfonic acid groups; Water sorption; Methanol sorption; Proton conductivity
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Funding
- Natural Sciences and Engineering Research Council of Canada
- Canadian Foundation for Innovation
- INRS-EMT
- Minister of Education, Recreation and Sport (MELS)
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In this work the functionalization of three commercial faujasites with different chemical composition and textural properties was carried out by post-grafting of mercapto-propyl groups followed by conversion into propyl sulfonic acid groups. The first part of the work was centered on the study of the effect of the chemical and textural properties of the zeolites on the silane grafting yield, revealing a higher extent of functionalization for samples with higher content of Al. Then, the effect of the grafting on textural and sorption properties of the faujasites, and the interplay between these properties and the proton conductivity was studied. In spite of the significant reduction of porosity and water sorption, functionalized zeolites showed increased proton conductivity, up to one order of magnitude. Moreover, water to methanol selectivity vapor improved with the degree of functionalization. (C) 2012 Elsevier Inc. All rights reserved.
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