DESTRUCTION OF N2O OVER DIFFERENT BED MATERIALS
Since under fluidized bed conditions N2O is produced as a by product of the De-Nox process, the thermal decomposition of N2O was investigated under conditions relevant to those in FBC installations. Laboratory experiments were made in a current of nitrogen using a fixed bed of pure quartz sand or sand with 10％ (wt.) of the solids tested, CaO and Fe2O3. With a sand bed the decomposition was slightly faster than in the empty reactor and the reaction was first order with respect to N2O. Both fresh CaO and Fe2O3 strongly catalysed N2O decomposition. Their effectiveness diminished after they were heated to temperatures typical for FBC, but they still retained appreciable activity. This activity went down with increasing particle size. The flue gas components investigated were O2, water vapour and CO2. Their presence appeared to interfere with N2O decomposition and increased with the concentration of the additive. The observations indicated that this could only be due to heterogeneous effects. Thus the effects of the bed solids and of the gas phase components are opposed. The effects associated with N2O decomposition have proved to be surprisingly complex and instead of supplying simple answers, this work uncovered more problems.
N2O decomposition bed material activity
M.Pilawska H.Zhang X.S.Hou Q.Liu J.F.Lu G.X.Yue
Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Tsinghua Univ Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, TsinghuaUnive Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Tsinghua Univ
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
953-959
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）