石炭ガス化燃料の拡散燃焼におけるNO_xの生成・分解機構

概要

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Mechanisms and characteristics of NO_x formation/destruction in laminar diffusion combustion of coal-gasified fuel in air are investigated by numerical computations taking into account detailed chemical kinetics and multicomponent diffusion. Conclusions were as follows : (l) Fuel N (NH_3) is decomposed to NH_i by OH, H and O in the fuel-rich region which results in NO formation. (2) CH_4 contained in the fuel induces HCN formation in the fuel-rich region. HCN is decomposed in a region closer to the stoichiometeric condition as compared with NH_3. HCN is converted to NO which increases the conversion rate of NH_3 to NO_x compared with the case when HCN is not generated during combustion. (3) Effects of NH_3 and CH_4 contents in the fuel, the preheating temperature and the excess air ratio were investigated to reveal the NO_x formation characteristics of the fuel.
社団法人日本機械学会の論文
1996-01-25