The effect of SO2 on the structural evolution of a supported Mn2V2O7 catalyst and its DeNO(x) performance

doi:10.1039/d1cy00693b

	The effect of SO2 on the structural evolution of a supported Mn2V2O7 catalyst and its DeNO(x) performance
	Lin Huangfu 1; Zhao, Shuying 1,2; Li, Jianting 1; Yao, Zhitiang 2; Li, Changming 1,2; Gaoa, Shiqiu 1; Yu, Jian 1
刊名	CATALYSIS SCIENCE & TECHNOLOGY
	2021-07-19
页码	8
ISSN号	2044-4753
DOI	10.1039/d1cy00693b
英文摘要	To investigate the structural evolution of vanadate catalysts in the presence of SO2 and its influence on DeNO(x) behaviors, three typical vanadate catalysts (unsupported Mn2V2O7, Mn2V2O7/TiO2, and sulphated Mn2V2O7/TiO2) were designed for the selective catalytic reduction of NO with NH3. The XRD, Raman, and S 2p XPS spectra and TG results confirmed the SO2-promoted decomposition of supported Mn2V2O7 to form VOx species and MnSO4 on TiO2. The XPS spectra of V 2p and (HR)TEM images further indicated the fusion of the decomposed VOx with TiO2 with increased dispersity for the active V species. The decomposition and sulfation of supported Mn2V2O7 markedly increased the specific surface area with the exposure of more active Mn/V sites, O-alpha species and acid sites as demonstrated by the XPS spectra of O 2p and BET, NH3-TPD and H-2-TPR results. The catalytic test exhibited that the formation of MnSO4 devitalized the Mn-based low-temperature active sites and worsened the low-temperature DeNO(x) performance below 250 degrees C, but the decomposition and sulfation of the supported Mn2V2O7 significantly enhanced the catalytic activity and N-2 selectivity above 250 degrees C owing to the exposure of more active V sites, O-alpha species and acid sites. These research results imply that the vanadate catalysts may be unstable in the presence of SO2 and more suitable for the purification of sulfur-free or pre-desulfurization flue gases in the high temperature range.
资助项目	National Natural Science Foundation of China[21601192] ; National Natural Science Foundation of China[21878310] ; National Key Research and Development Program of China[2017YFB0310403] ; Open Subject from State Key Laboratory of Multi-phase Complex Systems[MPCS-2019-0-03]
WOS关键词	LOW-TEMPERATURE NH3-SCR ; SELECTIVE REDUCTION ; CEVO4 SYSTEMS ; MNOX CATALYST ; NOX ; SCR ; TIO2 ; DECOMPOSITION ; TOLERANCE ; VANADIUM
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000674394500001
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Open Subject from State Key Laboratory of Multi-phase Complex Systems
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/49455]
专题	中国科学院过程工程研究所
通讯作者	Li, Changming; Yu, Jian
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Beijing Technol & Business Univ, Sch Ecol & Environm, State Environm Protect Key Lab Food Chain Pollut, Beijing 100048, Peoples R China
推荐引用方式 GB/T 7714	Lin Huangfu,Zhao, Shuying,Li, Jianting,et al. The effect of SO2 on the structural evolution of a supported Mn2V2O7 catalyst and its DeNO(x) performance[J]. CATALYSIS SCIENCE & TECHNOLOGY,2021:8.
APA	Lin Huangfu.,Zhao, Shuying.,Li, Jianting.,Yao, Zhitiang.,Li, Changming.,...&Yu, Jian.(2021).The effect of SO2 on the structural evolution of a supported Mn2V2O7 catalyst and its DeNO(x) performance.CATALYSIS SCIENCE & TECHNOLOGY,8.
MLA	Lin Huangfu,et al."The effect of SO2 on the structural evolution of a supported Mn2V2O7 catalyst and its DeNO(x) performance".CATALYSIS SCIENCE & TECHNOLOGY (2021):8.