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材料导报  2022, Vol. 36 Issue (8): 20080137-8    https://doi.org/10.11896/cldb.20080137
  无机非金属及其复合材料 |
基于氧化铈的低温NH3-SCR催化剂的研究进展
李娜1,2, 陈泽东1, 王晶晶1, 张凯1, 武文斐1,3
1 内蒙古科技大学能源与环境学院,内蒙古 包头 014010
2 华北电力大学环境科学与工程学院,河北 保定 071000
3 内蒙古自治区高效洁净燃烧重点实验室,内蒙古 包头 014010
Research Progress of Cerium Oxide-based Catalysts for NH3-SCR at Low Temperature
LI Na1,2, CHEN Zedong1, WANG Jingjing1, ZHANG Kai1, WU Wenfei1,3
1 School of Energy and Environment, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia, China
2 School of Environmental Science and Engineering, North China Electric Power University, Baoding 071000, Hebei, China
3 Key Laboratory of Efficient and Clean Combustion, Baotou 014010, Inner Mongolia, China
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摘要 选择性催化还原(SCR)技术是一种成熟的工业烟气和柴油机废气脱硝技术,但是低温(特别是在200 ℃以下)的NH3-SCR催化剂目前仍没有工业化应用。近几年,很多学者将Ce基催化剂作为低温NH3-SCR催化剂,发现Ce基催化剂有优良的低温催化性能。本文对Ce基催化剂在NOx低温NH3-SCR反应中的研究进展和性能进行了综述。按照CeO2在催化剂的存在形式将铈基催化剂分为:铈基复合氧化物催化剂、负载型氧化物催化剂及CeO2作载体的催化剂三类。影响铈基复合氧化物催化剂的活性和选择性的关键因素有催化剂的活化能、比表面积、制备方法、焙烧温度、分散性、其他金属掺杂物、氧化还原性能等,本文对这些关键因素进行了系统的分析和总结。针对负载型氧化物催化剂,重点介绍了Ce基多金属氧化物的载体(Al2O3、TiO2、新型载体)及载体在低温NH3-SCR反应中的作用。CeO2作载体的催化剂,脱硝效率虽不及前两种类型的催化剂,但将金属与CeO2混合或掺杂作为共同载体的催化剂的脱硝性能和抗硫抗水性能都有显著提升,值得研究者们进一步研究,文中也进行了简要介绍。随后重点研究了低温NH3-SCR机制,包括E-R机制和L-H机制。最后,对NOx低温NH3-SCR的研究前景及未来的研究方向进行了展望。
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李娜
陈泽东
王晶晶
张凯
武文斐
关键词:  低温  选择性催化还原  脱硝  氧化铈  反应机理    
Abstract: Selective catalytic reduction (SCR) is a mature NOx removal technology for industrial flue gas and diesel exhaust gas. However, it is still a challenge to develop novel low-temperature catalysts for NH3-SCR of NOx, especially at temperatures below 200 ℃. In the past few years, many studies have demonstrated the potential of cerium (Ce)-based catalysts as low-temperature catalysts for NH3-SCR of NOx, it is found that Ce-based catalyst has excellent catalytic performance at low temperature. Herein, the recent progress and performance of Ce-based catalysts for low-temperature NH3-SCR of NOx were summarized. Based on the different roles of ceria in NH3-SCR catalysts, a systematic review of the latest research progress of Ce-based catalysts in the NH3-SCR reaction is performed as the following aspects: ceria-based mixed oxides, Ce-based multi-metal oxide with support, CeO2 used as supports. The catalytic activity and selectivity of Ce-based mixed oxides catalysts are systematically analyzed and summarized in light of some key factors such as activation energy, specific surface area, morphology, crystallinity, preparation method, calcination temperature, other metal dopant/substitute, and redox property of catalysts. For Ce-based multi-metal oxide with support, the main supporter (Al2O3, TiO2 and new type supporter) and the role of supporter in NH3-SCR reaction at low temperature are mainly introduced. Although the NOx removal efficiency of CeO2 as the catalyst carrier is not as high as that of the other two types of catalysts, the catalyst mixed or doped with metal and CeO2 as the common supporter has significantly denitration performance and sulfur-resistant and water-resis-tant performance, which is worthy of further study, as this paper introduces briefly. Subsequently, NH3-SCR mechanisms at low temperature, including E-R and L-H mechanisms, were emphasized. Lastly, the perspective and future directions of low-temperature NH3-SCR of NOx were proposed.
Key words:  low temperature    selective catalytic reduction (SCR)    denitration    cerium oxide    reaction mechanism
出版日期:  2022-04-25      发布日期:  2022-04-27
ZTFLH:  X511  
基金资助: 内蒙古自治区自然科学基金(2018MS02013;2019ZD13);国家自然科学基金(51866013)
通讯作者:  wwf@imust.com   
作者简介:  李娜,2008年7月毕业于华北电力大学环境工程专业,获得硕士学位。目前是内蒙古科技大学教师,副教授,硕士研究生导师,华北电力大学在读博士。主要研究领域为电厂烟气脱硝脱碳及催化剂的制备。在研项目有国家自然基金一项、省部级项目三项。发表核心论文10余篇,其中两篇被SCI收录。
武文斐,教授,2001年7月于北京科技大学热能工程专业毕业,获得工学博士学位,内蒙古自治区高效洁净燃烧重点实验室主任,国家重点实验室矿物催化材料方向负责人。自治区“111”人才工程二层次人才,“自治区优秀科技工作者”称号获得者,自治区“草原英才”称号获得者。主要研究领域为高效洁净燃烧及催化材料的制备,长期从事矿物催化材料的研究。在研项目:主持国家自然基金一项、省部级重大项目两项。发表SCI论文10余篇。
引用本文:    
李娜, 陈泽东, 王晶晶, 张凯, 武文斐. 基于氧化铈的低温NH3-SCR催化剂的研究进展[J]. 材料导报, 2022, 36(8): 20080137-8.
LI Na, CHEN Zedong, WANG Jingjing, ZHANG Kai, WU Wenfei. Research Progress of Cerium Oxide-based Catalysts for NH3-SCR at Low Temperature. Materials Reports, 2022, 36(8): 20080137-8.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20080137  或          http://www.mater-rep.com/CN/Y2022/V36/I8/20080137
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