The improvement of the conventional Non-Catalytic Reduction of NO with the addition of H2O2 was investigated. At 800-1000 K, the pyrolysis of H2O2 producing OH was the only source of reactive radicals. While OH reacted with NH3 to produce NH2 reducing NO, reaction with remaining H2O2 produced HO2, which then oxidized NO to NO2. NO2 could not be further reduced in this composition and temperature region. To avoid the unfavorable secondary reaction, H2O2 concentration must be sufficiently low compared to that of NH3, since the rate constants of OH-NH3 and OH-H2O2 were comparable. The total amount of this additives must be equivalent or in a little excess of the initial concentration of NO to be reduced, for both NH3 and H2O2. In the simulation of atmospheric methane-air combustion containing 100-1000 ppm of NO, 90% reduction of NO was achieved at 800-1200 K by ten-fold injection of H2O2 within the 1 sec of total reaction time, where the byproduction of NO2 was kept low throughout the conditions. Original is an abstract.
|Number of pages||1|
|Journal||International Symposium on Combustion Abstracts of Accepted Papers|
|State||Published - 1 Jan 2000|
|Event||28th International Symposium on Combustion - Edinburgh, United Kingdom|
Duration: 30 Jul 2000 → 4 Aug 2000