类水滑石与常规吸附剂中高温脱除HCl实验研究  

Study on removal of HCl from flue gas at medium-high temperature

作　　者：曹俊[1] 王志飞[2] 钟文琪[1] 金保昇[1] 王恺[1] 陶敏[1] 

机构地区：[1]东南大学能源热转换及其过程测控教育部重点试验室,南京210096 [2]东南大学化学化工学院,南京210096

出　　处：《东南大学学报（自然科学版）》2014年第5期963-967,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB201505);江苏省杰出青年基金资助项目(BK20130022);东南大学优秀博士学位论文基金资助项目(YBJJ1224);英国工程和物理科学研究委员会国际合作资助项目(EP/G063176)

摘　　要：为获得中高温条件下高效脱除烟气中HCl的吸附剂，对自制类水滑石吸附剂HTL与常用的吸附剂CaO，NaHCO3在不同温度（300～700℃）、不同HCl初始浓度（750～1500 mg/m^3）以及不同反应时间条件下对HCl的脱除特性进行了比较研究。结果表明：随HCl初始浓度的升高、反应时间的延长，CaO，NaHCO3的脱除效率都呈下降趋势；随温度升高，CaO对HCl的脱除效率一直呈下降趋势，而NaHCO3对HCl的脱除效率先下降，在550℃后又呈现上升趋势，并且在温度高于600℃时NaHCO3，CaO均出现了结块和熔融现象；而以上各条件对HTL的影响不大，其脱除效率一直高于95％。In order to obtain sorbent that can remove HCl with high efficiency at medium-high temperature,the removal efficiency of hydrotalcite-like sorbent （HTL）prepared domestically was compared with traditional sorbents such as CaO,NaHCO3 under different temperatures （300 to 700 ℃）, initial concentrations of HCl （750 to 1 500 mg/m^3 ）,and reaction times.The results show that,with the increase of initial concentrations of HCl and the extension of reaction time,the removal efficiencies of CaO,NaHCO3 decrease.With the temperature increasing,the removal efficiency of CaO declines.However,the removal efficiency of NaHCO3 falls at the beginning,and then rises after 550℃.And when the temperature is high than 600 ℃,NaHCO3 and CaO are sintered and melted. However,the above conditions have little influence on HTL.The removal efficiency of HTL under different conditions always keeps more than 95%.

关 键 词：中高温 HCL 脱除效率 类水滑石结构吸附剂 

分 类 号：X701.2[环境科学与工程—环境工程]