A stagnation-flow burner facility was used to study the catalytic surface reactions of premixed combustion systems at atmospheric pressure. The configuration serves as an important platform to investigate the interaction between homogeneous and heterogeneous reactions with independent control of the characteristic chemical and physical residence time scales. Methane/oxygen/nitrogen and propane/oxygen/nitrogen mixtures were examined with and without the presence of a platinum catalyst located at the stagnation surface. The effects of oxidizer composition and nitrogen dilution were investigated. Lean flame extinction limits were determined for the two fuels and were found to be unaffected by the presence of the catalytic surface. The flame extinction data indicated that the systems were controlled by gas phase combustion with negligible contributions from heterogeneous reactions. The catalytic activity of the heated surface in response to the direct impingement of fuel/air mixtures onto the stagnation surface, without the presence of a flame, was quantified by the increase in the surface temperature. The methane/air mixtures demonstrated no catalytic activity for these conditions, whereas propane/air mixtures demonstrated temperature increases of over 100 K. The data indicate that the surface reaction was transport limited for the propane/air system.
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November 2009
This article was originally published in
Journal of Heat Transfer
Research Papers
An Experimental Study of the Effects of Platinum on Methane/Air and Propane/Air Mixtures in a Stagnation Point Flow Reactor
James T. Wiswall,
James T. Wiswall
Department of Mechanical Engineering,
University of Michigan
, 2350 Hayward Street, Ann Arbor, MI 48109
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Margaret S. Wooldridge,
Margaret S. Wooldridge
Department of Mechanical Engineering,
University of Michigan
, 2350 Hayward Street, Ann Arbor, MI 48109
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Hong G. Im
Hong G. Im
Department of Mechanical Engineering,
University of Michigan
, 2350 Hayward Street, Ann Arbor, MI 48109
Search for other works by this author on:
James T. Wiswall
Department of Mechanical Engineering,
University of Michigan
, 2350 Hayward Street, Ann Arbor, MI 48109
Margaret S. Wooldridge
Department of Mechanical Engineering,
University of Michigan
, 2350 Hayward Street, Ann Arbor, MI 48109
Hong G. Im
Department of Mechanical Engineering,
University of Michigan
, 2350 Hayward Street, Ann Arbor, MI 48109J. Heat Transfer. Nov 2009, 131(11): 111201 (8 pages)
Published Online: August 25, 2009
Article history
Received:
November 20, 2008
Revised:
April 2, 2009
Published:
August 25, 2009
Citation
Wiswall, J. T., Wooldridge, M. S., and Im, H. G. (August 25, 2009). "An Experimental Study of the Effects of Platinum on Methane/Air and Propane/Air Mixtures in a Stagnation Point Flow Reactor." ASME. J. Heat Transfer. November 2009; 131(11): 111201. https://doi.org/10.1115/1.3156788
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