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Catalytic oxidation of propylene--6. Mechanistic studies utilizing isotopic tracers

Journal Article · · J. Catal.; (United States)
The oxidation of deuterated propylene with oxygen and of propylene with oxygen-18 on well-characterized Bi/sub 2/Mo/sub 3/O/sub 12/, Bi/sub 2/MoO/sub 6/, and Bi/sub 3/FeMo/sub 2/O/sub 12/ catalysts at 350/sup 0/-450/sup 0/C revealed that acrolein formed only by the redox mechanism and not by the peroxide mechanism on the catalysts tested. Carbon dioxide formed only by consecutive oxidation of acrolein on the two bismuth molybdate catalysts and its formation involved only lattice oxygen, but on the bismuth iron molybdate, carbon dioxide formed by parallel and consecutive reactions involving adsorbed and lattice oxygen. The rate-determining step of acrolein production on all three catalysts was the formation of an allylic species by abstraction of a methyl hydrogen from propylene.
Research Organization:
Univ. of Wisconsin, Milwaukee
OSTI ID:
6448603
Journal Information:
J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 61:2; ISSN JCTLA
Country of Publication:
United States
Language:
English