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Journal of Porous Media
Facteur d'impact: 1.49 Facteur d'impact sur 5 ans: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v7.i2.20
8 pages

A Numerical Investigation of Catalytic Oxidation of Very Lean Methane-Air Mixtures within a Packed-Bed Reactor

L. B. Younis
SNC-Lavalin Inc, Calgary, Alberta, T2P 3H5, Canada
I. Wierzba
Department of Mechanical and Manufacturing Engineering, University of Calgary 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4

RÉSUMÉ

A model for the combustion of methane-air mixtures in the presence of a catalyst in a packed-bed reactor has been developed. The one-dimensional model accounts for both gas-phase (homogeneous) and catalytic surface (heterogeneous) reactions. These reactions are modeled as single-step reactions of the Arrhenius type. Heat transfer by conduction, convection, and radiation has also been included. The governing equations, which are solved numerically, are the unstead-state equations of conservation of mass, chemical species, and energy for both solid and gas phases, which are assumed not to be in local thermal equilibrium. The results of a numerical investigation conducted with methane as a fuel and platinum as a catalyst are presented for a range of operational conditions, such as inlet temperatures (700−1,300 K), approach velocities (1−3 m/s), and equivalence ratios (0.15−0.50). The calculated values of methane conversion within the packed-bed reactor showed good agreement with some corresponding experimental data obtained for similar conditions. The preliminary results of the numerical investigation showed that the oxidation of methane in such a reactor can be modeled adequately.