Enhancing the deNO(x) performance of MnOx/CeO2-ZrO2 nanorod catalyst for low-temperature NH3-SCR by TiO2 modification

doi:10.1016/j.cej.2019.03.052

	Enhancing the deNO(x) performance of MnOx/CeO2-ZrO2 nanorod catalyst for low-temperature NH3-SCR by TiO2 modification
	Yao, Xiaojiang1 ; Chen, Li 1; Cao, Jun 1; Chen, Yang1 ; Tian, Mi 1; Yang, Fumo2 ; Sun, Jingfang 3; Tang, Changjin 3; Dong, Lin 3
刊名	CHEMICAL ENGINEERING JOURNAL
	2019-08-01
卷号	369 页码:46-56
关键词	MnOx/CeO2 -ZrO2 nanorod catalyst TiO2 modification N2O formation Redox property Surface acidity Low-temperature NH3-SCR reaction
ISSN号	1385-8947
DOI	10.1016/j.cej.2019.03.052
通讯作者	Yao, Xiaojiang(yaoxj@cigit.ac.cn)
英文摘要	In the present work, we chose MnOx/CeO2-ZrO2 nanorod (i.e., Mn/CZ-NR) as a benchmark catalyst, and used TiO2 as a modifier with the purpose of inhibiting the formation of N2O (by-product) as well as further enhancing the catalytic activity and H2O + SO2 tolerance of Mn/CZ-NR catalyst. These samples were characterized by TEM, HRTEM, XRD, Raman, H-2-TPR, XPS, NH3-TPD, and in situ DRIFTS. DeNO(x), performance and H2O + SO2 tolerance of these samples were evaluated by low-temperature NH3-SCR reaction. The obtained results show that the TiO2 modified catalyst (i.e., Mn-Ti/CZ-NR) exhibits higher catalytic activity than Mn/CZ-NR catalyst due to larger amount of oxygen vacancy accompanied with more Ce3+, higher ratios of Mn4+ and surface adsorbed oxygen species, as well as the improvement of surface acidity. Furthermore, TiO2 modification effectively inhibits the non-selective oxidation of NH3 to N2O through appropriately weakening the redox property of Mn/CZ-NR catalyst, which is beneficial to the enhancement of N-2 selectivity. Finally, Mn-Ti/CZ-NR catalyst exhibits excellent H2O + SO2 tolerance, which indicates that it has the potential to be used for practical low-temperature deNO(x), application.
资助项目	National Natural Science Foundation of China[21876168] ; National Natural Science Foundation of China[21507130] ; Youth Innovation Promotion Association of CAS[2019376] ; Chongqing Science & Technology Commission[cstc2016jcyjA0070] ; Chongqing Science & Technology Commission[cstckjcxljrc13]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000463344800006
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/7758]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Yao, Xiaojiang
作者单位	1.Chinese Acad Sci, Res Ctr Atmospher Environm, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm CAS, Chongqing 400714, Peoples R China 2.Sichuan Univ, Natl Engn Res Ctr Flue Gas Desulfurizat, Dept Environm Sci & Engn, Chengdu 610065, Sichuan, Peoples R China 3.Nanjing Univ, Ctr Modern Anal, Sch Environm, Jiangsu Key Lab Vehicle Emiss Control, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Yao, Xiaojiang,Chen, Li,Cao, Jun,et al. Enhancing the deNO(x) performance of MnOx/CeO2-ZrO2 nanorod catalyst for low-temperature NH3-SCR by TiO2 modification[J]. CHEMICAL ENGINEERING JOURNAL,2019,369:46-56.
APA	Yao, Xiaojiang.,Chen, Li.,Cao, Jun.,Chen, Yang.,Tian, Mi.,...&Dong, Lin.(2019).Enhancing the deNO(x) performance of MnOx/CeO2-ZrO2 nanorod catalyst for low-temperature NH3-SCR by TiO2 modification.CHEMICAL ENGINEERING JOURNAL,369,46-56.
MLA	Yao, Xiaojiang,et al."Enhancing the deNO(x) performance of MnOx/CeO2-ZrO2 nanorod catalyst for low-temperature NH3-SCR by TiO2 modification".CHEMICAL ENGINEERING JOURNAL 369(2019):46-56.