Kinetic modeling of hydrocarbon/nitric oxide interactions in a flow reactor
Journal Article
·
· Combustion and Flame
- Technical Univ. of Denmark, Lyngby (Denmark). Dept. of Chemical Engineering
- Sandia National Labs., Livermore, CA (United States). Combustion Research Facility
The reduction of nitric oxide by reaction with C{sub 1} and C{sub 2} hydrocarbons under reducing conditions in a flow reactor has been analyzed in terms of a detailed chemical kinetic model. The experimental data were partly adopted from previous work and partly obtained in the present study; they cover the temperature range 800--1500 K and the reburn fuels CH{sub 4}, C{sub 2}H{sub 2}, C{sub 2}H{sub 6}, and natural gas. Modeling predictions indicate that, under the conditions investigated, HCCO + NO and CH{sub 3} + NO are the reactions most important in reducing NO. The HCCO + NO reaction is the dominant reaction when using natural gas on C{sub 2} hydrocarbons as reburn fuels. This reaction leads partly to HCNO, which is recycled to NO, and partly to HCN, which is converted to N{sub 2} or NO. When methane or natural gas are used as reburn fuel, the CH{sub 3} + NO reaction contributes significantly to remove NO. Modeling predictions are in reasonably good agreement with the experimental observations for the fuels investigated, even though the NO reduction potential is overpredicted for methane and underpredicted for ethane. Modeling predictions for NO are very sensitive to the formation of HCCO and to the product branching ratio for the HCCO + NO reaction. Furthermore, the present analysis indicates that more work is needed on critical steps in the hydrocarbon oxidation scheme.
- OSTI ID:
- 669948
- Journal Information:
- Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 1-2 Vol. 115; ISSN CBFMAO; ISSN 0010-2180
- Country of Publication:
- United States
- Language:
- English
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