| Alkane activation over acidic zeolites: the first step. | |
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MedLine Citation:
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PMID: 19918812 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The heterogeneous acid-catalyzed activation step of alkanes leading to the reaction intermediates (carbocationic or alkoxy species) was up to now the matter of a longstanding controversy. Gas chromatography and online mass spectroscopy measurements show that H(2) and methane are formed over H-zeolites, whereas HD and CH(3)D are formed over D-zeolites as the primary products in the reaction with isobutane. These results indicate that sigma-bond protolysis by strong acid sites is the first step for hydrocarbon activation on these catalysts at mild temperatures (473 K), in analogy to the activation path occurring in liquid superacid media. |
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Authors:
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Benoit Louis; M Maciel Pereira; Fabiana M Santos; Pierre M Esteves; Jean Sommer |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Chemistry (Weinheim an der Bergstrasse, Germany) Volume: 16 ISSN: 1521-3765 ISO Abbreviation: Chemistry Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2010-01-04 Completed Date: 2010-02-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9513783 Medline TA: Chemistry Country: Germany |
Other Details:
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Languages: eng Pagination: 573-6 Citation Subset: - |
Affiliation:
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Laboratoire des Mat?riaux Surfaces et Proc?d?s pour la Catalyse, Member of ELCASS (European Laboratory for Catalysis and Surface Sciences), UMR 7515 CNRS, 25 rue Becquerel 67087 Strasbourg Cedex 2, France. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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