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Title: Cyclohexane oxidative dehydrogenation over copper oxide catalysts

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1359262
Grant/Contract Number:
DOE DE-FG02-03-ER154757; AC02-06CH11357; FG02-03ER15457
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 341; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-05 21:22:23; Journal ID: ISSN 0021-9517
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Nauert, Scott L., Schax, Fabian, Limberg, Christian, and Notestein, Justin M. Cyclohexane oxidative dehydrogenation over copper oxide catalysts. United States: N. p., 2016. Web. doi:10.1016/j.jcat.2016.07.002.
Nauert, Scott L., Schax, Fabian, Limberg, Christian, & Notestein, Justin M. Cyclohexane oxidative dehydrogenation over copper oxide catalysts. United States. doi:10.1016/j.jcat.2016.07.002.
Nauert, Scott L., Schax, Fabian, Limberg, Christian, and Notestein, Justin M. 2016. "Cyclohexane oxidative dehydrogenation over copper oxide catalysts". United States. doi:10.1016/j.jcat.2016.07.002.
@article{osti_1359262,
title = {Cyclohexane oxidative dehydrogenation over copper oxide catalysts},
author = {Nauert, Scott L. and Schax, Fabian and Limberg, Christian and Notestein, Justin M.},
abstractNote = {},
doi = {10.1016/j.jcat.2016.07.002},
journal = {Journal of Catalysis},
number = C,
volume = 341,
place = {United States},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jcat.2016.07.002

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  • A novel molybdena catalyst has been prepared by metal oxide vapor synthesis (MOVS) and used to promote the vapor phase oxidative dehydrogenation of cyclohexane and cyclohexene. At temperatures in excess of 553 K, the conversion of cyclohexane over {gamma}-alumina supported and unsupported MOVS catalysts and a commercial MoO{sub 3}/Al{sub 2}O{sub 3} sample yielded cyclohexene, benzene, carbon monoxide, and carbon dioxide as the only detected products. The unsupported MOVS sample behaves as an active heterogeneous catalyst but the specific activities are increased by a factor of up to 8 upon supporting the precursor on alumina. The supported MOVS system also exhibitsmore » appreciable higher activity than the commercial catalyst and this is attributed to the unique dual dioxo-molybdenum sites present in the active MOVS catalyst. The oxidative dehydrogenation of cyclohexane is viewed as occurring in a stepwise fashion with cyclohexene appearing in the product mixture and the generation of carbon oxides occurring principally from the direct combustion of cyclohexane. Oxygen consumption, specific activities, and molar selectivities for the conversion of both reactants in the overall temperature range 488 K {le}T{le}673 K over the three molybdena systems are provided. Cyclohexene conversion to benzene exhibits zero and first-order behavior with regard to the hydrocarbon and oxygen concentrations, respectively, and apparent activation energies are recorded for the supported (89 kJ mol{sup {minus}1}) and unsupported (126 kJ mol{sup {minus}1}) MOVS and commercial (103 kJ mol{sup {minus}1}) catalysts. The nature of the reactive oxygen and catalytic sites are considered and the reactivity and stoichiometry of the deep oxidation of both cyclic hydrocarbons are presented. 40 refs., 11 figs., 2 tabs.« less
  • The oxidative dehydrogenation of cyclohexane was studied at 440 and 484{degree}C over NdVO{sub 4}, Mg{sub 3}(VO{sub 4}){sub 2}, and a mixes V-Mg-O catalyst. Cyclohexene was the major initial product. Benzene, carbon oxides, and a trace of cyclohexadiene were also observed. The catalytic behavior of the mixed V-Mg-O catalyst in this reaction was very similar to its behavior in the oxidation of butane. However, the behaviors of NdVO{sub 4} in the two reactions were different. The difference between the two catalysts was attributed to their different rates of reoxidation.
  • No abstract prepared.