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题名: Study of the Reducing and Sulfiding Process of Mo-Supported Catalyst by in situ LRS
作者: Wei Zhaobin1;  Wei Chengdong1;  Xin Qin1
关键词: In situ LRS ;  Reduction Sulfidation ;  Mo/Al2O3 ;  Mo:TiO2-Al2O3
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 1994
DOI: 10.3866/PKU.WHXB19940506
卷: 10, 期:5, 页:402-408
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: In this paper the changes of Mo species of Mo/Al2O3 and Mo/TiO2-Al2O3 catalysts in reducing and sulfiding process have been studied by in situ LR spectroscopic technique. The results show: (1) The reducibility of various Mo species in Mo/Al2O3 is different.The bands of octahedral Mo species and their polymer at 215 and 971 cm(-1) disappeared first at 100 degrees C, and then crystalline MoO3 at 820 cm(-1) at below 300 degrees C in H-2. The bands of Al-2(MoO4)(3) phase at 377 and 1003 cm(-1) disappeared at 400 degrees C. Polymer of octahedral Mo species at 961 cm(-1) and crystalline MoO3 at 289, 666, 816 and 994 cm(-1) exist in Mo/TiO2-Al2O3 catalysts. The former was reduced at lower temperatures than the latter. (2) When H2S-H-2 flowed into sample cell at room temperature, the bands of oxidic Mo/Al2O3 disapeared, and simultaneously, the bands of MoS2 at 377, 401 cm(-1) and complicated molybdenum oxysulfide at 325, 348, 450, 540 cm(-1) emerged. After sulfiding at 400 degrees C, only MoS2 phase exists. For Mo/TiO2-Al2O3, the bands of Mo and TiO2 disappeared upon sulfiding of a sample at room temperature, and the bands of MoS2 at 375 and 398 cm(-1) emerged. This reveals that modification of the Al2O3 surface by TiO2 strongly enhances the sulfiding of Mo supported catalysts
语种: 英语
WOS记录号: WOS:000207589200006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141171
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Wei Zhaobin,Wei Chengdong,Xin Qin. Study of the Reducing and Sulfiding Process of Mo-Supported Catalyst by in situ LRS[J]. ACTA PHYSICO-CHIMICA SINICA,1994,10(5):402-408.
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