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International Journal of Energy for a Clean Environment
SJR: 0.195 SNIP: 0.435 CiteScore™: 0.74

ISSN Imprimer: 2150-3621
ISSN En ligne: 2150-363X

International Journal of Energy for a Clean Environment

Précédemment connu sous le nom Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.v5.i1.20
24 pages

CATALYTIC COMBUSTION OF HYDROGEN-AIR MIXTURES OVER PLATINUM: VALIDATION OF HETERO/HOMOGENEOUS CHEMICAL REACTION SCHEMES

C. Appel
Paul Scherrer Institute, Combustion Research, CH-5232 Villigen-PSI, Switzerland
Ioannis Mantzaras
Paul Scherrer Institute, Combustion Research, CH-5232 Villigen-PSI, Switzerland
R. Schaeren
Paul Scherrer Institute, Combustion Research, CH-5232 Villigen-PSI, Switzerland
R. Bombach
Paul Scherrer Institute, Combustion Research, CH-5232 Villigen-PSI, Switzerland
A. Inauen
Paul Scherrer Institute, Combustion Research, CH-5232 Villigen-PSI, Switzerland

RÉSUMÉ

The validity of various hetero/homogeneous chemical reaction schemes in the catalytically stabilized combustion (CST) of hydrogen/air mixtures over platinum is investigated experimentally and numerically. The work stems from the internationally intensified effort to commercialize power generation turbines operating with the ultra-low NOx CST technology. Crucial to the development of such systems is the understanding of the heterogeneous (catalytic) and the homogeneous (gas-phase) kinetics. Experiments were performed in an optically accessible catalytic channel reactor and involved planar laser induced fluorescence (PLIF) of the OH radical and line-Raman measurements of major species concentrations. The comparisons between measurements and detailed numerical predictions using elementary, reduced, or one-step mechanisms have revealed substantial differences in the performance of the reaction schemes.