On the surface sites Of MOP/SiO2 catalyst under sulfiding conditions: IR spectroscopy and catalytic reactivity studies

	On the surface sites Of MOP/SiO2 catalyst under sulfiding conditions: IR spectroscopy and catalytic reactivity studies
	Wu, ZL; Sun, FX; Wu, WC; Feng, ZC; Liang, CH; Wei, ZB; Li, C
刊名	journal of catalysis
	2004-02-15
卷号	222 期号:1 页码:41-52
关键词	molybdenum phosphide catalyst sulfur hydrodesulfurization IR spectroscopy CO adsorption
产权排序	1;1
英文摘要	the surface sites of mop/sio2 catalysts and their evolution under sulfiding conditions were characterized by ir spectroscopy using co as the probe molecule. the hds activities of thiophene were measured on the mop/sio2 catalyst that was subjected to different sulfidation and reactivation pretreatments. cus modelta+ (0 < delta less than or equal to 2) sites are probed on the surface of fresh mop/sio2 by molecularly adsorbed co, exhibiting a characteristic ir band at 2045 cm(-1). the surface of mop/sio2 is gradually sulfided in hds reactions, as revealed by the shift of the ir band at 2045 to ca. 2100 cm(-1). although the surface of a mop/sio2 catalyst becomes partially sulfided, the hds activity tests show that mop/sio2 is fairly stable in the initial stage of the hds reaction, providing further evidence that molybdenum phosphide is a promising catalytic material for industrial hds reactions. two kinds of surface sulfur species are formed on the sulfided catalyst: reversibly and irreversibly bonded sulfur species. the mop/sio2 catalyst remains stable in the hds of thiophene because most sulfur species formed under hds conditions are reversibly bonded on the catalyst surface. a detrimental effect of presulfidation on the hds activity is observed for the mop/sio2 catalyst treated by h2s/h-2 at temperatures higher than 623 k, which is ascribed to the formation of a large amount of the irreversibly bonded sulfur species. the irreversibly sulfided catalyst can be completely regenerated by an oxidation and a subsequent reduction under mild conditions. (c) 2003 elsevier inc. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; engineering, chemical
研究领域[WOS]	chemistry ; engineering
关键词[WOS]	transition-metal phosphides ; magnetic-resonance spectroscopy ; supported molybdenum carbide ; tungsten phosphide ; ft-ir ; thiophene hydrodesulfurization ; hydroprocessing catalysts ; nitride catalysts ; alumina catalyst ; carbon-monoxide
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000188943200005
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/82657]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Wu, ZL,Sun, FX,Wu, WC,et al. On the surface sites Of MOP/SiO2 catalyst under sulfiding conditions: IR spectroscopy and catalytic reactivity studies[J]. journal of catalysis,2004,222(1):41-52.
APA	Wu, ZL.,Sun, FX.,Wu, WC.,Feng, ZC.,Liang, CH.,...&Li, C.(2004).On the surface sites Of MOP/SiO2 catalyst under sulfiding conditions: IR spectroscopy and catalytic reactivity studies.journal of catalysis,222(1),41-52.
MLA	Wu, ZL,et al."On the surface sites Of MOP/SiO2 catalyst under sulfiding conditions: IR spectroscopy and catalytic reactivity studies".journal of catalysis 222.1(2004):41-52.