Alkali metal-resistant mechanism for selective catalytic reduction of nitric oxide over V2O5/HWO catalysts

doi:10.1016/j.fuel.2021.121445

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Alkali metal-resistant mechanism for selective catalytic reduction of nitric oxide over V2O5/HWO catalysts
	Kang RN(康润宁)4,5; He JY(何君尧)5; Bin F(宾峰)4,5; Dou, Baojuan 3; Hao, Qinglan 3; Wei XL(魏小林)4,5; Hui, Kwun Nam 2; San Hui, Kwan 1
刊名	FUEL
	2021-11-15
卷号	304 页码:12
关键词	Commercial bacterial cellulose V2O5/HWO catalyst Alkali metal-resistant Poisoning SCR reaction
ISSN号	0016-2361
DOI	10.1016/j.fuel.2021.121445
通讯作者	Bin, Feng(binfeng@imech.ac.cn) ; San Hui, Kwan(k.hui@uea.ac.uk)
英文摘要	A series of V2O5/HWO catalysts are prepared by hydrothermal and impregnation methods using different precursors, among which the V2O5/HWO-C catalyst exhibited the optimal NH3-SCR performance. Compared to oxalic acid (O) and water (W), commercial bacterial cellulose (C) as a precursor can firstly achieve a more controllable synthesis to form hexagonal WO3 (HWO) of V2O5/HWO-C catalyst. Various characterization (XRD, N-2-BET, TEM, SEM, XPS, EDX mapping, and NH3/NO-TPD-MS) indicate that a higher specific surface area, abundant active oxygen and surface acidity result from the V2O5/HWO-C catalyst. The reason is that HWO-C has an excellent and smooth rod-shaped morphology, which promotes high dispersion of V2O5 on its surface. In situ IR results show that the SCR follows the Langmuir-Hinshelwood (L-H) mechanism, where absorbed NOx intermediate species are formed on the V2O5 and react with the NH4+ and NH3abs groups of V2O5 and HWO. After loading 1.75 wt% K+, the obtained K-V2O5/HWO-C catalyst exhibits effective resistance to K poisoning and SO2, and retains 78 % NOx conversion efficiency at 360 degrees C after 10 h, attributed to the effective capture of K+(1.04 wt %) in HWO-C channels via a new pathway, although approximately 0.71 wt% K+ are located on HWO-C external surface with weak bonding to V2O5.
分类号	一类
资助项目	National Natural Science Foundation of China[51736010] ; Key Projects of Tianjin Natural Science Foundation[19JCZDJC40100]
WOS关键词	V2O5-WO3/TIO2 SCR CATALYST ; VANADIA-TITANIA CATALYSTS ; CHEMICAL DEACTIVATION ; SELF-PROTECTION ; NO ; NH3 ; OXIDATION ; PERFORMANCE ; POTASSIUM ; AMMONIA
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
WOS记录号	WOS:000691238500002
资助机构	National Natural Science Foundation of China ; Key Projects of Tianjin Natural Science Foundation
其他责任者	Bin, Feng ; San Hui, Kwan
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87362]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Univ East Anglia, Fac Sci, Sch Engn, Norwich Res Pk, Norwich NR4 7TJ, Norfolk, England 2.Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Taipa, Macao, Peoples R China; 3.Tianjin Univ Sci & Technol, Tianjin 300457, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 5.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Kang RN,He JY,Bin F,et al. Alkali metal-resistant mechanism for selective catalytic reduction of nitric oxide over V2O5/HWO catalysts[J]. FUEL,2021,304:12.
APA	康润宁.,何君尧.,宾峰.,Dou, Baojuan.,Hao, Qinglan.,...&San Hui, Kwan.(2021).Alkali metal-resistant mechanism for selective catalytic reduction of nitric oxide over V2O5/HWO catalysts.FUEL,304,12.
MLA	康润宁,et al."Alkali metal-resistant mechanism for selective catalytic reduction of nitric oxide over V2O5/HWO catalysts".FUEL 304(2021):12.