Reaction network and kinetics of propane oxydehydrogenation over nickel cobalt molybdate

Journal Article · Tue Apr 15 04:00:00 EDT 1997 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1997.1569· OSTI ID:563492

Stern, D L; Grasselli, R K ^[1]

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1. Mobil Technology Company, Paulsboro, NJ (United States)

Reaction kinetics and a proposed mechanism for the oxydehydrogenation of propane over Ni{sub 0.5}Co{sub 0.5}MoO{sub 4}/SiO{sub 2} are described. The reaction pathway proceeds by propane oxydehydrogenation yielding propylene as the exclusive primary product. The propylene thus formed oxidizes further primarily to acrolein, which oxides still further to waste products CO and CO{sub 2}, and acrylic acid. The relative rate of acrolein formation from propylene is 3.5 times that of propylene formation from propane, the rate of CO{sub 2}, formation from acrolein is 13 times that of acrolein formation from propylene, and the rate of CO{sub 2}, formation from acrolein is 46 times that of propylene formation from propane. Kinetic isolation of intermediates is therefore imperative for the recovery of practical amounts of useful products, and might be achievable through dioxygen limitation in the feed or utilization of cocatalysts to produce more stable intermediates. The selective oxidation of propane to propylene and propylene to acrolein are both zero order in oxygen and first order in hydrocarbon (propane and propylene, respectively). Deep oxidation of propane (to CO and CO{sub 2}) is half order in oxygen and first order in propane, while deep oxidation of propylene exhibits Langmuir type dependence on hydrocarbon and is half order in oxygen. 17 refs., 7 figs.

• OSTI ID: 563492
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 167; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
40 CHEMISTRY
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
COBALT COMPOUNDS
DEHYDROGENATION
HETEROGENEOUS CATALYSIS
MOLYBDATES
NICKEL COMPOUNDS
OXIDATION
PROPANE
REACTION INTERMEDIATES