| Project/Area Number |
12650779
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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 | Kyushu University |
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Principal Investigator |
SASAKI Kazunari Faculty of Engineering Sciences, Associate Professor, 大学院・総合理工学研究院, 助教授 (80322296)
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| Project Period (FY) |
2000 – 2002
|
| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2002: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2001: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2000: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | combustion catalysis / Palladium / SnO2 / low-temperature oxidation / deactivation / methane oxidation |
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| Research Abstract |
The activity for low-temperature methane oxidation over oxide-supported catalysts such as Pd/Al_2O_3, Pd/SnO_2, and Pd/Al_2O_3-36NiO was investigated. It was found that Pd/Al_2O_3 was deactivated most significantly due to water vapor, and that Pd/Al_2O_3-36NiO was most insensitive to water vapor. The catalytic activity of Pd/Al_2O_3 decreased monotonically as water vapor concentration increased, whereas Pd/SnO_2 and Pd/Al_2O_3-36NiO showed almost constant activity under higher water vapor concentrations.
The catalytic activity at high steam concentration was in the following order: Pd/SnO_2 >Pd/Al_2O_3-36NiO > Pd/Al_2O_3. Kinetic analysis with methane adsorption as the rate-limiting step was applied to evaluate the water inhibiting effect. Pd/Al_2O_3 displayed the most negative value of the enthalpy of water adsorption, while Pd/SnO_2 and Pd/Al_2O_3-36NiO exhibited similar water adsorption enthalpy.
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