SCR脱硝催化剂的碱及碱土金属中毒研究进展  

Research Progress on Alkali and Alkaline Earth Metal Poison of SCR Catalyst

作　　者：梅笛[1] 谢峻林[1] 方德[1] 张哲[1] 董盼盼[1] 何峰[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《硅酸盐通报》2014年第6期1398-1402,1407,共6页Bulletin of the Chinese Ceramic Society

基　　金："十二五"国家科技支撑项目(2011BAE29B02)

摘　　要：选择性催化还原法(SCR)是目前治理NO_x比较成熟和有效的手段,催化剂是SCR烟气脱硝系统中重要的组成部分,其性能会直接影响到SCR系统的整体脱硝效果和脱硝成本。在水泥、玻璃窑中,烟气成分中含有Na、K、Ca等碱及碱土金属,它们进入到SCR脱硝系统中后,会吸附于催化剂上,引起催化剂中毒,导致催化剂的使用寿命和催化效率显著降低,同时增加了SCR脱硝成本。本文介绍了碱及碱土金属对钒基和锰基脱硝催化剂的中毒研究情况,总结了其中毒作用机理、抗中毒能力提升及循环再生的相关研究工作进展。Selective Catalytic Reduction （SCR） is a mature and effective method for controlling NOx emissions. In the flue gas denitration system, one of the most important parts was the catalyst, whose property would directly affect the total effect and cost of denitrification. In cement and glass furnace, the flue gas always contains alkali and alkali-earth metals such as Na, K, Ca and so on. They pass into the SCR system to be adsorbed on the catalyst, resulting in catalyst poisoning that reduces the service life and efficiency of the catalyst. At the same time, the cost of SCR denitration would increase. In this paper, we introduce the poison effect of alkali and alkali-earth metals over Vanadium and Manganese based catalysts. We also summarize the mechanism of poisoning, the increase of poison tolerance and the work progress of cyclic regeneration.

关 键 词：SCR NOx 催化剂 碱及碱土金属 中毒 

分 类 号：TD98[矿业工程—选矿]