Mechanism of the Isomerization of 1-Alkene during Iron-Catalyzed Fischer–Tropsch Synthesis

The deuterium/hydrogen exchange reaction was performed under iron-catalyzed Fischer–Tropsch reaction conditions using a mixture of deuterated octane, nonane, decane, tridecane, and pentadecane as the probes. The results indicated that deuterium/hydrogen exchange does not occur in alkanes under these...

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Bibliographic Details
Published in:Journal of catalysis 2001-04, Vol.199 (2), p.202-208
Main Authors: Shi, Buchang, O'Brien, Robert J, Bao, Shiqi, Davis, Burtron H
Format: Article
Language:English
Subjects:
Catalysis
Catalytic reactions
Chemistry
deuterium
Exact sciences and technology
Fischer–Tropsch synthesis
General and physical chemistry
iron catalyst
isomerization, alkene
isotopic tracer
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The deuterium/hydrogen exchange reaction was performed under iron-catalyzed Fischer–Tropsch reaction conditions using a mixture of deuterated octane, nonane, decane, tridecane, and pentadecane as the probes. The results indicated that deuterium/hydrogen exchange does not occur in alkanes under these conditions. Under the same reaction conditions, 1-octene-d16 was used as the probe to study the isomerization of 1-alkene. The 1-octene-d16 was reduced to deuterated octane, and isomerized to deuterated trans-2-octene and cis-2-octene with approximately equal amounts of the two isomers. No other internal deuterated octene and C7 products were obtained. The deuterium/hydrogen exchange reaction occurred in deuterated 1-octene as well as in the products formed from it. The maximum number of deuterium atoms that can be replaced by hydrogen is 5. There is no C8D16 isotopomer of 2-octenes. To account for these experimental facts, a mechanism was proposed for the isomerization of 1-alkene under iron-catalyzed Fischer–Tropsch reaction conditions.
ISSN:0021-9517
1090-2694
DOI:10.1006/jcat.2001.3175