A model of elementary chemistry and fluid mechanics in the combustion of hydrogen on platinum surfaces

Using computational methods, we consider the catalyzed combustion of lean hydrogenoxygen mixtures in a stagnation flow over a platinum surface and in a flat-plate boundary layer. The analysis includes elementary chemistry in the gas phase as well as on the surface. The stagnation flow is modeled us...

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Bibliographic Details
Published in:Combustion and flame 1994-03, Vol.96 (4), p.393-406
Main Authors: Warnatz, Jürgen, Allendorf, Mark D., Kee, Robert J., Coltrin, Michael E.
Format: Article
Language:English
Subjects:
08 HYDROGEN
083000 - Hydrogen- Combustion- (1990-)
Applied sciences
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
Combustion of gaseous fuels
Combustion. Flame
ELEMENTS
Energy
Energy. Thermal use of fuels
Exact sciences and technology
HYDROGEN
HYDROXYL RADICALS
KINETICS
MATHEMATICAL MODELS
METALS
NONMETALS
PLATINUM
PLATINUM METALS
RADICALS
REACTION KINETICS
STAGNATION POINT
Theoretical studies. Data and constants. Metering
TRANSITION ELEMENTS
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Summary:Using computational methods, we consider the catalyzed combustion of lean hydrogenoxygen mixtures in a stagnation flow over a platinum surface and in a flat-plate boundary layer. The analysis includes elementary chemistry in the gas phase as well as on the surface. The stagnation flow is modeled using a similarity transformation that leads to a one-dimensional boundary-value problem, whereas the flat-plate boundary layer is modeled by the use of the boundary-layer assumption. Predictions of each model are compared with experimental measurements of (a) catalytic ignition and combustion of hydrogenoxygen mixtures at low pressure (100 millitorr) and (b) OH concentration profiles in catalytically supported combustion at atmospheric pressure. The article proposes reaction mechanisms and interprets the catalytic behavior in terms of the chemistry models.
ISSN:0010-2180
1556-2921
DOI:10.1016/0010-2180(94)90107-4