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Trimethylamine as a probe molecule to differentiate acid sites in Y-FAU zeolite: FTIR study.
MedLine Citation:
PMID:  16805624     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
In heterogeneous catalysis acidity has a very important influence on activity and selectivity: correct determination of acidic properties is a base to improve industrial processes. The aim of this work was to study trimethylamine (TMA) as a probe molecule able to distinguish between the different Brønsted acid sites in zeolitic frameworks. Our work mainly focused on faujasite-type zeolites because the HY zeolite is one of the most used acidic catalysts in industrial processes. In this paper, typical IR bands assigned to TMA-protonated species (formed in supercages) are detected in the HY zeolite. TMA interacting by hydrogen bonding with the acid sites located in the sodalite units is also observed. The wavenumbers of some typical IR bands assigned to TMA-protonated species appear to depend on the acidic strength, and a complementary study with ZSM-5 and X-FAU samples confirms this proposition.
Authors:
Francisca Romero Sarria; Vanessa Blasin-Aubé; Jacques Saussey; Olivier Marie; Marco Daturi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  110     ISSN:  1520-6106     ISO Abbreviation:  J Phys Chem B     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-06-29     Completed Date:  2007-07-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  United States    
Other Details:
Languages:  eng     Pagination:  13130-7     Citation Subset:  -    
Affiliation:
Laboratoire Catalyse & Spectrochimie, CNRS-ENSICAEN, 6 Bd du Maréchal Juin, 14050 Caen Cedex, France.
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