Experimental study of volatile-N conversion at O2/CO2 atmosphere in a drop tube furnace
In coal combustion,NOx is largely formed from the oxidation of volatile nitrogen compounds such as HCN and NH3.The experiments on the volatile-N conversion to NO at O2/CO2 atmosphere were carried out in a drop tube furnace.The effects of the excess oxygen ratio X (0.6-1.4),temperature (1000-1300℃),O2/CO2 ratio,and as well as CH4/NH3 mole ratio were investigated.To further understand the importance of NO reburn during volatile combustion,experiments were also performed with different concentrations of background NO (0-950 ppm).The results show that volatile-N conversion to NO is sensitive to excess oxygen ratio X at strongly oxidizing atmosphere.For volatile combustion,there is an optimal temperature and inlet O2 concentration to minimize the volatile-N conversion to NO.The CH4/NH3 mole ratio plays an important role on the NO formation under oxidizing atmosphere.High levels of background NO prohibit the volatile-N conversion to NO significantly as the volatile-N conversion ratio decreases by 19-36％.The reburn fractions of recycle NO in fuel-rich and fuel-lean condition are 14.8％ and 9.8％ at 1200℃,respectively.
Volatile-N NO release O2/CO2 combustion
Huali Cao Shaozeng Sun Hao Chen Xianyu Meng Dong Wang Terry F.Wall
Combustion Engineering Research Institute.Harbin Institute of Technology,Harbin,150001,China Chemical Engineering,University of Newcastle,NSW 2308,Australia
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
257-260
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）