Study on the influence of CaO on NH3+NO+O2 reaction system in pre-calciner
This paper studied the influence of CaO on NH3+NO+O2 reaction system in pre-calciner.Experiments were carried out in a fixed bed reactor.Influence of CaO on NH3+NO+O2 reaction,NH3 oxidation,NH3 decomposition and NO reduction by NH3 at O2 free condition were studied.NH3 conversion rates and product selectivities were obtained for each reaction condition.It was proved that the influence of CaO on SNCR performance changed with temperature.CaO promoted SNCR performance at 650°C and changed to inhibit SNCR performance when temperature increased above 700°C.CaO influenced the reaction of NH3+NO+O2 mainly by catalyzing NH3 oxidation.NH3 conversion rate and NO selectivity decreased when NH3 concentration increased.Addition of NO into NH3 heterogeneous oxidation had little effect on NH3 conversion rate but decreased NO selectivity.A reaction mechanism for NH3+NO+O2 reaction on CaO surface was proposed.Heterogeneous reaction model of NH3+NO+O2 on CaO surface was established based on the proposed reaction mechanism.Numerical results showed that the reaction model in this paper could predict NH3 oxidation and NH3 +NO+O2 reaction on CaO surface very well.
CaO SNCR NH3 oxidation conversion selectivity
J.S.Tang Q.Song S.L.Fu X.Y.Wu Q.Yao
Institute of Theraml Engineering,Tsinghua University,Beijing 100084,China
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
338-343
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）