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2024, 06, v.49 19-29
宽温度区间NH3-SCR催化剂研究进展
基金项目(Foundation): 国家自然科学基金项目(51962017,51462017)
邮箱(Email): yulan000@hotmail.com;
DOI: 10.16112/j.cnki.53-1223/n.2024.06.411
摘要:

氨气选择性催化还原(NH3-SCR)是目前最有效的降低移动源NOx排放的技术手段.我国汽车尾气排放标准从“国五”升至“国六”,机动车混合动力技术的应用,需要NH3-SCR催化剂在宽的温度区间(200~550℃)内保持高的NOx转化效率.本文综述了具有宽的活性温度区间的NH3-SCR催化剂的研究进展,主要从催化剂的表面酸性、氧化还原性能、比表面积及孔隙率和晶粒状态等理化性质和结构特征对该类催化剂脱硝温度区间的影响进行了总结,以此对FeMn基沸石分子筛NH3-SCR催化剂进行探索,并展望了宽活性温度区间的NH3-SCR催化剂的研究前景及方向.

Abstract:

Selective catalytic reduction of NOx by NH3(NH3-SCR) is the most effective technology for reducing NOx emissions from vehicles.With the upgrading of China automobile exhaust emission standards from “China Ⅴ” to “China Ⅵ”,and the application of hybrid electrical vehicle, NH3-SCR catalysts should have higher NOx conversion efficiency in a wide temperature range(200~550 ℃).This paper reviews the research progress on NH3-SCR catalysts with broad active temperature ranges, primarily summarizing the impact of physicochemical properties and structural characteristics such as surface acidity, redox properties, specific surface area, porosity, and crystal grain state on the denitration temperature range of these catalysts.The exploration of FeMn-based zeolite molecular sieve NH3-SCR catalysts is discussed, and the research prospects and directions for NH3-SCR catalysts with broad active temperature ranges are also anticipated.

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基本信息:

DOI:10.16112/j.cnki.53-1223/n.2024.06.411

中图分类号:U464.134.4;X734.2

引用信息:

[1]张晨,梁银,许骁,等.宽温度区间NH_3-SCR催化剂研究进展[J].昆明理工大学学报(自然科学版),2024,49(06):19-29.DOI:10.16112/j.cnki.53-1223/n.2024.06.411.

基金信息:

国家自然科学基金项目(51962017,51462017)

发布时间:

2024-04-09

出版时间:

2024-04-09

网络发布时间:

2024-04-09

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