Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 35, Issue 7, Pages 2694-2697Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2009.04.036
Keywords
Flameless combustion; Hydrogen containing fuels; NOx emission; Flue gas recirculation
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In this paper, flameless combustion was promoted to suppress thermal-NOx formation in the hydrogen-high-containing fuel combustion. The PSRN model was used to model the flameless combustion in the air for four fuels: H-2/CH4 60/40% (by volume), H-2/CH4 40/60%, H-2/CH4 20/80% and pure hydrogen. The results show that the NOx emissions below 30 ppmv while CO emissions are under 50 ppmv, which are coincident with the experimental data in the clean flameless combustion regime for all the four fuels. The simulation also reveals that CO decreases from 48 ppmv to nearly zero when the hydrogen composition varies from 40% to 100%, but the NOx emission is not sensitive to the hydrogen composition. In the highly diluted case, the NOx and CO emissions do not depend on the entrainment ratio. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
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