摘要
控制氮氧化物排放技术中,选择性催化还原(SCR)法因脱硝效率高且技术成熟稳定成为目前广泛应用的技术,烟气中碱(土)金属导致催化剂活性中心的失活现象是目前工业烟气SCR脱硝催化剂应用的一个瓶颈.基于此,开发有良好碱(土)金属耐受性的低温高效SCR催化剂是当务之急.本文整理和归纳了SCR催化剂碱(土)金属中毒机理,探讨了提高催化剂抗碱(土)金属中毒的改性方法及作用机制、中毒催化剂的再生方法及量子化学计算的应用,最后对SCR催化剂的未来研究发展方向进行了展望.
Selective catalytic reduction(SCR)method has attracted much attention in nitrogen oxide emission controlling technology because of excellent denitrification performance and stable application.The deactivation of catalyst active sites caused by alkali(earth)metals in flue gas is one of the bottlenecks which limits the industrial application of catalysts.In this paper,the mechanism of the poisoning effect of alkali(earth)metals on SCR catalysts was summarized in detail.The modification methods and mechanism of improving the catalyst resistance to alkali(earth)metal poisoning were discussed.The regeneration methods of poisoned catalyst and the application of quantum chemical calculation were explored.Finally,the future research direction of SCR catalysts was prospected,which is helpful to provide references for the development of efficient and stable SCR catalysts.
作者
兰馨
赵玲
LAN Xin;ZHAO Ling(College of Ecology and Environment,Inner Mongolia University,Hohhot,010021,China)
出处
《环境化学》
CAS
CSCD
北大核心
2022年第11期3778-3788,共11页
Environmental Chemistry
基金
国家自然科学基金(21866022)
内蒙古自然科学基金(2021MS02014)资助.
