NO[sub x] and CO emissions from a pulse combustor operating in a lean premixed mode

Conference · Thu Dec 01 04:00:00 EST 1994 · Combustion and Flame; (United States)

OSTI ID:6529158

Keller, J O; Bramlette, T T; Barr, P K; Alvarez, J R ^[1]

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1. Sandia National Labs., Livermore, CA (United States). Combustion Research Facility

Control over the combustion fluid dynamics was used to minimize the emission of NO[sub x] and CO. The combustion kinetics were controlled by operating the combustor premixed and were varied by modifying the equivalence ratio over the lean stability envelope. A wide dynamic range in fluid dynamic mixing characteristics was also investigated by modifying the degree of macroscopic mixing and microscopic mixing. The residence time at high temperature was controlled by modifying the frequency of the periodic reacting flow in a pulse combustor. It was found that controlling the flame temperature, chemical kinetics, and residence time at high temperature was best accomplished by controlling the equivalence ratio and the degree of macroscopic mixing rather than controlling the microscopic mixing over the dynamic range obtainable by the techniques used in this study. Emission levels below 5.0 ppm NO[sub x], with corresponding levels of 5.0 ppm CO (corrected to 3% O[sub 2]), were achieved in a pulse combustor operating in a lean premixed mode, without the use of any post combustion cleanup technologies. Both NO[sub 2] and CO emissions were invariant to changes in the power input.

• OSTI ID: 6529158
• Report Number(s): CONF-940711--
• Conference Information: Journal Name: Combustion and Flame; (United States) Journal Volume: 99:3-4
• Country of Publication: United States
• Language: English

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