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Fuel-rich catalytic combustion: A soot-free technique for in situ hydrogen-like enrichmentAn experimental program on the catalytic oxidation of iso-octane demonstrated the feasibility of the two-stage combustion system for reducing particulate emissions. With a fuel-rich (phi = 4.8 to 7.8) catalytic combustion preburner as the first stage the combustion process was soot free at reactor outlet temperatures of 1200 K or less. Although soot was not measured directly, its absence was indicated. Reaction products collected at two positions downstream of the catalyst bed were analyzed on a gas chromatograph. Comparison of these products indicated that pyrolysis of the larger molecules continued along the drift tube and that benzene formation was a gas-phase reaction. The effective hydrogen-carbon ratio calculated from the reaction products increased by 20 to 68 percent over the range of equivalence ratios tested. The catalytic partial oxidation process also yielded a large number of smaller-containing molecules. The fraction of fuel carbon in compounds having two or fewer carbon atoms ranged from 30 percent at 1100 K to 80 percent at 1200 K.
Document ID
19850022931
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Brabbs, T. A. (NASA Lewis Research Center Cleveland, OH, United States)
Olson, S. L. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
July 1, 1985
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
NAS 1.60:2498
NASA-TP-2498
E-2604
Accession Number
85N31244
Funding Number(s)
PROJECT: RTOP 505-31-04
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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