Kinetic Study of Promoted SNCR Process by Different Gas Additives
A detailed chemical kinetic model for promoted SNCR process by H2, CO and CH4 was developed based on recent studies. The model was validated by available experimental data. The influence of H2, CO and CH4 on SNCR process was investigated by chemical kinetics calculation. The results indicate that H2 is more effective to lower SNCR temperature window than CO and CH4. While the additives concentration is low, CH4 is more effective than CO. But when the molar ratio of additives and initial NO exceeds 3, the effect of CO begins to catch up that of CH4. The promotion mechanisms of them were identified through sensitivity and rate-ofproduction analysis. The effects of these additives on NO reduction are achieved principally by promoting the production of OH, O and H radicals. Besides the reaction of CH3 radical with NO2 enhances NO reduction at lower temperature when CH4 additive is used.
Selective Non-Catalytic Reduction (SNCR) gas addtives chemical kinetic model
CAO Qing-xi LIU Hui WU Shao-hua ZHAO Li-ping HUANG Xia
Institute of Combustion Engineering Harbin Institute of Technology Harbin, China
国际会议
上海
英文
4034-4038
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）