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Transient Catalytic Combustor Model With Detailed Gas and Surface ChemistryIn this work, we numerically investigate the transient combustion of a premixed gas mixture in a narrow, perfectly-insulated, catalytic channel which can represent an interior channel of a catalytic monolith. The model assumes a quasi-steady gas-phase and a transient, thermally thin solid phase. The gas phase is one-dimensional, but it does account for heat and mass transfer in a direction perpendicular to the flow via appropriate heat and mass transfer coefficients. The model neglects axial conduction in both the gas and in the solid. The model includes both detailed gas-phase reactions and catalytic surface reactions. The reactants modeled so far include lean mixtures of dry CO and CO/H2 mixtures, with pure oxygen as the oxidizer. The results include transient computations of light-off and system response to inlet condition variations. In some cases, the model predicts two different steady-state solutions depending on whether the channel is initially hot or cold. Additionally, the model suggests that the catalytic ignition of CO/O2 mixtures is extremely sensitive to small variations of inlet equivalence ratios and parts per million levels of H2.
Document ID
20050185104
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Struk, Peter M. (NASA Glenn Research Center Cleveland, OH, United States)
Dietrich, Daniel L. (NASA Glenn Research Center Cleveland, OH, United States)
Mellish, Benjamin P. (National Center for Space Exploration Research Cleveland, OH, United States)
Miller, Fletcher J. (National Center for Space Exploration Research Cleveland, OH, United States)
Tien, James S. (Case Western Reserve Univ. Cleveland, OH, United States)
Date Acquired
September 7, 2013
Publication Date
May 1, 2005
Subject Category
Inorganic, Organic And Physical Chemistry
Report/Patent Number
NASA/TM-2005-213590
E-15058
Meeting Information
Meeting: Fourth Joint Meeting of the US Sections
Location: Philadelphia, PA
Country: United States
Start Date: March 20, 2005
End Date: March 23, 2005
Sponsors: Combustion Inst.
Funding Number(s)
WBS: WBS 22-101-12-43
CONTRACT_GRANT: NNC04AA29A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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