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“Hydrogen‐Catalyzed” Dehydrogenation: A Supercritical Conundrum
Author(s) -
Hyde Jason R.,
Walsh Ben,
Poliakoff Martyn
Publication year - 2005
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200502049
Subject(s) - dehydrogenation , supercritical fluid , exothermic reaction , catalysis , hydrogen , chemistry , thermal , chemical engineering , organic chemistry , thermodynamics , physics , engineering
Hot spots : The surprising, apparently catalytic effect of H 2 in the dehydrogenation of 1 in supercritical CO 2 is the result of thermal hot spots (see thermal image of reactor) generated in the catalyst bed by an initial exothermic hydrogenation. The localized heating forces the dehydrogenation reaction which also gives the diene 2 by a route that is potentially much simpler than the established procedure.