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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
KeywordMolybdenum Phosphide Catalyst Sulfur Hydrodesulfurization Ir Spectroscopy Co Adsorption
Source PublicationJOURNAL OF CATALYSIS
2004-02-15
DOI10.1016/j.jcat.2003.10.019
Volume222Issue:1Pages:41-52
Indexed BySCI
SubtypeArticle
Funding Project503
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordTRANSITION-METAL PHOSPHIDES ; MAGNETIC-RESONANCE SPECTROSCOPY ; SUPPORTED MOLYBDENUM CARBIDE ; TUNGSTEN PHOSPHIDE ; FT-IR ; THIOPHENE HYDRODESULFURIZATION ; HYDROPROCESSING CATALYSTS ; NITRIDE CATALYSTS ; ALUMINA CATALYST ; CARBON-MONOXIDE
AbstractThe 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.
Language英语
URL查看原文
WOS IDWOS:000188943200005
Citation statistics
Cited Times:60[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/82657
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
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.
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