摘要
氨气选择性催化还原(SCR)技术是一种广泛应用于工业排放氮氧化物(NO x)脱硝的方法。大型燃气轮机、船舶和柴油车等排放的烟气温度往往高于450℃,这要求催化剂在高温环境下兼具良好的催化活性、选择性以及稳定性,故开发高温SCR催化剂是脱硝领域中极具挑战的问题。综述在高温催化脱硝条件下分子筛催化剂(Cu基分子筛和Fe基分子筛)和金属氧化物催化剂的研究现状,分析了高温SCR催化剂的催化性能和理化特征,并提出影响高温SCR催化剂催化性能的关键因素。总结当前高温SCR脱硝技术存在的挑战,同时对未来的发展方向进行展望。
NH 3 selective catalytic reduction(SCR)technology is a widely used method for eliminating nitrogen oxides(NO x)from industrial emissions.The flue gas temperature emitted from large gas turbines,ships and diesel vehicles is often higher than 450℃,which requires catalysts with good catalytic activity,selectivity and stability under high temperature,so the development of high-temperature SCR catalysts is a challenging issue in the field of denitrification.The current research status of molecular sieve catalysts(Cu-based molecular sieve and Fe-based molecular sieve)and metal oxide catalysts under high-temperature catalytic denitrification conditions is reviewed,the catalytic performance and physicochemical characteristics of high-temperature SCR catalysts are analysed,and the key factors affecting the catalytic perf-ormance of high-temperature SCR catalysts are proposed.The challenges of current high-temperature SCR denitrification technology are summarised,while the future development direction is prospected.
作者
方思勇
张雷
Fang Siyong;Zhang Lei(Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir,School of Environmental and Chemical Engineering,Chongqing Three Gorges University,Chongqing 404000,China)
出处
《工业催化》
CAS
2024年第9期16-25,共10页
Industrial Catalysis
基金
重庆市自然科学基金面上项目(CSTB2023NSCQ-MSX1008)。
关键词
催化剂工程
高温脱硝
NH
3选择性催化还原
Cu基分子筛
Fe基分子筛
金属氧化物催化剂
catalyst engineering
high temperature denitrification
NH 3 selective catalytic reduction
Cu-based molecular sieve
Fe-based molecular sieve
metal oxide catalysts
