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Water‐Promoted Hydrocarbon Activation Catalyzed by Binuclear Gallium Sites in ZSM‐5 Zeolite
Author(s) -
Hensen Emiel J. M.,
Pidko Evgeny A.,
Rane Neelesh,
van Santen Rutger A.
Publication year - 2007
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.200702463
Subject(s) - dehydrogenation , catalysis , propane , hydrocarbon , gallium , alkane , zeolite , chemistry , photochemistry , organic chemistry
Steamy alkane activation : Propane dehydrogenation over Ga/ZSM‐5 is substantially improved upon addition of steam to the hydrocarbon feed, which is due to an increase of the steady‐state concentration of hydroxylated reaction intermediates. Quantum‐chemical computations indicate that H 2 recombination, required to initiate the catalytic cycle, is more favorable over binuclear oxygen‐bridged Ga 3+ complexes than over mononuclear GaO + ions (see picture).