Enhancing the deNOx 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 deNOx performance of MnOx/CeO2-ZrO2 nanorod catalyst for low-temperature NH3-SCR by TiO2 modification
	Yao, Xiaojiang 1; Chen, Li 1; Cao, Jun 1; Chen, Yang 1; Tian, Mi 1; Yang, Fumo 3; Sun, Jingfang 2; Tang, Changjin 2; Dong, Lin 2
刊名	Chemical Engineering Journal
	2019
卷号	369 页码:46-56
ISSN号	13858947
DOI	10.1016/j.cej.2019.03.052
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, H2-TPR, XPS, NH3-TPD, and in situ DRIFTS. DeNOx 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 N2 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 deNOx application. © 2019 Elsevier B.V.
语种	英语
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/9829]
专题	中国科学院重庆绿色智能技术研究院
作者单位	1.Research Center for Atmospheric Environment, Key Laboratory of Reservoir Aquatic Environment of CAS, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China; 2.Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, School of the Environment, Nanjing University, Nanjing; 210093, China 3.National Engineering Research Center for Flue Gas Desulfurization, Department of Environmental Science and Engineering, Sichuan University, Chengdu; 610065, China;
推荐引用方式 GB/T 7714	Yao, Xiaojiang,Chen, Li,Cao, Jun,et al. Enhancing the deNOx 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 deNOx 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 deNOx performance of MnOx/CeO2-ZrO2 nanorod catalyst for low-temperature NH3-SCR by TiO2 modification".Chemical Engineering Journal 369(2019):46-56.