Activation Mechanism of Hydrogen and Organosulfur Compounds over Supported Noble Metal Hydrodesulfurization Catalysts
| Project/Area Number |
14550757
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
触媒・化学プロセス
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| Research Institution | MURORAN INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
SUGIOKA Masatoshi MURORAN INSTITUTE OF TECHNOLOGY, Department of Electrical and Electronic Engineering, Professor, 工学部, 教授 (80001329)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2003: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2002: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | Noble metal / Mesoporous silica / Desulfurization catalyst / Hydrogen / Thiophene / Activation mechanism / Reaction mechanism / Catalyst design / 活性化 / 反応機構 |
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| Research Abstract |
The order of noble metals (MM) supported on mesoporous silica MCM-41 for the hydrodesulfurization (HDS) of thiophene at 350℃ was Pt>Pd>Rh>>Ru. This order is corresponded to that of n-butane formation in the HDS of thiophene, indicating that hydrogen is activated on MM to form spillover hydrogen.
On the other hand, thiophene is activated on silanol groups (Si-OH) on MCM-41. The spillover hydrogen formed on NM attacks the thiophene molecule activated on MCM-41 in the HDS of thiophene. These results suggested that the high dispersion of NM on MCM-41 to form spillover hydrogen and the enhancement of surface acidity of MCM-41 is important in order to design highly active NM/MCM-41 catalysts for the HDS reaction. The surface modification of MCM-41 with alumina was performed to enhanced the acidity of MCM-41 and the NM dispersion on MCM-41. The catalytic activity of NM, especially Pt, supported on Al_2O_03 modified MCM-41 (Pt/Al_2O_3-MCM-41) for the HDS of thiophene was remarkably higher than Pt/MCM-41. In this work, new highly active Pt/Al_2O_3-MCM-41 catalyst has been successfully developed for the HDS of organosulfur compounds contained in the petroleum feedstocks.
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Report
(3 results)
Research Products
(15 results)
