An investigation to define the physical/chemical constraints which limit NO sub x emission reduction achievable by reburning

Technical Report · Sat Oct 01 04:00:00 EDT 1988

DOI:https://doi.org/10.2172/6781077· OSTI ID:6781077

Chen, S L; Moller, E C; Pershing, D W

Reburning is an NO{sub x} control technology which uses fuel to reduce No. 1-4. Thus, the main heat release zone can be operated normally to achieve optimum combustion conditions without regard for NO{sub x} control. Previous studies have shown that 60% reduction in NO{sub x} emissions can be achieved with natural gas reburning. This is considerably less than the limits imposed by thermodynamics on NO formation under fuel-rich conditions. The purpose of the studies described in this quarterly report was to define the chemical constraints which prevent 85% NO{sub x} reduction with reburning. Tests were conducted in a bench scale tunnel furnace to independently examine the formation of N{sub 2} in the reburning zone and the conversion of XN species in the burnout zone. Detailed measurements were performed at the reburning zone exit to characterize unburned hydrocarbons, CO, NO, NH{sub 3} and HCN. The influence of the concentrations of reactive species was examined as were temperature effects for both the reburning and burnout zone. 13 figs.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: AC22-86PC91025
• OSTI ID: 6781077
• Report Number(s): DOE/PC/91025-T7; ON: DE90012651
• Country of Publication: United States
• Language: English

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