| 研究課題/領域番号 |
17F17772
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| 研究機関 | 東京大学 |
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研究代表者 |
大山 茂生 東京大学, 大学院工学系研究科(工学部), 教授 (50572939)
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| 研究分担者 |
LUNDIN SEAN-THOMAS 東京大学, 工学(系)研究科(研究院), 外国人特別研究員
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| 研究期間 (年度) |
2017-10-13 – 2020-03-31
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| キーワード | CH4 partial oxidation / methanol formation / dimethyl ether formation / formaldehyde formation / silica membrane / chemical vapor deposition |
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| 研究実績の概要 |
This project focuses on the development and implementation of catalytic membrane technology for the selective oxidation of methane. Significant progress was made in the recent year on all aspects of the project. Membrane development has progressed using several types of organometallic precursors to form tightly controlled pore structures using chemical vapor deposition. These membranes are capable of selectively separating oxygen and methane while maintaining a high oxygen permeance into the catalyst bed. Additionally, several catalysts have been developed using a wide range of metals and supports capable of oxidizing methane to methanol, formaldehyde and dimethyl ether with significant selectivity over CO2.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
Significant progress was made during the project on all aspects. Membrane development has progressed using several types of organometallic precursors to form tightly controlled pore structures using the chemical vapor deposition technique. These membranes are capable of selectively separating oxygen and methane while maintaining a high oxygen permeance into the catalyst bed. Notably, this is the first major study conducted on the oxygen permeability of these membrane materials. Previous research has focused heavily on hydrogen separations and some hydrocarbon separations, but almost no data existed previously on the oxygen permeation through silica membranes. Thus, this study has explored and defined a new type of separation using silica-based membrane materials.
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| 今後の研究の推進方策 |
The silica-based membranes and catalysts for methane oxidation will be combined and implemented into the catalytic membrane reactor system. Using the membrane to supply the oxidant separately from the methane feed will show good promise and partial oxygenate products will be produced in quantities higher than that found in various literature sources. The catalytic membrane reactor nearly doubles productivity of formaldehyde in the case of a platinum catalyst. Using a tantalum- and silica-based membrane combined with a platinum on yttria catalyst, we can successfully demonstrate the potential benefits of a catalytic membrane configuration.
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