烟煤氧解耦化学链气化及氮氧化物生成机理  

Mechanism of Chemical Looping Gasification and NO_(x) Generation of Bituminous Coal in Oxygen Uncoupling Mode

作　　者：徐国强 韩龙 巫平江 马凯莉 乌悦伦 夏佳 张诚琨 Xu Guoqiang;Han Long;Wu Pingjiang;Ma Kaili;Wu Yuelun;Xia Jia;Zhang Chengkun(Institute of Energy and Power Engineering,College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江工业大学机械工程学院能源与动力工程研究所,杭州310014

出　　处：《燃烧科学与技术》2021年第5期569-579,共11页Journal of Combustion Science and Technology

基　　金：国家重点研发计划资助项目(2018YFB0605403).

摘　　要：通过机械混合与挤压法制备铜基载氧体CuO/MgAl,采用批量给料式流化床研究烟煤及其半焦在化学链气化过程中含碳气体和NO_(x)的逸出特性,并讨论不同反应条件对含碳气体和NO_(x)逸出的影响.结果表明:煤氧解耦化学链气化过程中产生的主要含碳气体为CO、CO_(2)和CH_(4),氮污染物含有NO和N_(2)O;降低气化温度、减小水蒸气流量以及增大流化气体流量有利于削弱载氧体的烧结影响并减少NO_(x)排放.所得结果可为煤氧解耦化学链气化的应用和NO_(x)的控制提供有益参考.A copper-based oxygen carrier CuO/MgAl was prepared by mechanical mixing and extrusion.The emission characteristics of carbon-containing gases and NO_(x)during the chemical looping gasification of bituminous coal and the corresponding char were investigated in a batch fluidized bed reactor,and the influences of different reaction conditions on the emission of carbon-containing gases and NO_(x)were discussed.The results show that during the coal chemical looping gasification process the main carbon-containing gases produced were CO,CO_(2)and CH_(4),and the nitrogen pollutants included NO and N_(2)O.A lower gasification temperature,a smaller steam flow rate and a higher fluidization gas flow rate were beneficial to weaken the sintering of the oxygen carrier and reduce NO_(x)emission.The results obtained in this study can provide reference for the applications and NO_(x)control of coal chemical looping gasification with oxygen uncoupling.

关 键 词：气化 氧解耦化学链 NO_(x)排放 CO_(2)捕集 载氧体 

分 类 号：TK16[动力工程及工程热物理—热能工程]