2009 Fiscal Year Final Research Report
Development of Highly Efficient Cobalt-based Catalyst for Direct Decomposition of Nitrous Oxide
| Project/Area Number |
19310050
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Kyoto University |
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Principal Investigator |
INOUE Masashi Kyoto University, 大学院・工学研究科, 教授 (30151624)
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| Co-Investigator(Kenkyū-buntansha) |
IWAMOTO Shinji 群馬大学, 大学院・工学研究科, 准教授 (50252482)
IMAMURA Seiichiro 京都大学, 大学院・工学研究科, 研究員 (00027898)
KANAI Hiroyoshi 京都大学, 大学院・工学研究科, 研究員 (40026050)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 環境保全技術 / 一酸化二窒素 / 触媒分解 |
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| Research Abstract |
Alkali-doped Co_3O_4 catalysts were developed for direct decomposition of N_2O in the presence of O_2. The catalysts can be prepared by the precipitation method ; however, activity of the catalyst strongly depended on the crystal structure of the precipitate. It was found that the amount of alkali adsorbed on or occluded in the precursor determines the activity of the catalyst formed by calcination of the precursor. Effects of the alkali component on the catalyst activity was also examine and it was found that the alkali component facilitates the reduction of Co(III) species and thus facilitates the desorption of oxygen atoms formed by decomposition of N_2O. The effect of carbon dioxide in the feed gas upon the catalyst activity was examined, and it was found that CO_2 is strongly adsorbed on the catalyst and disturbs the activity of the catalyst.
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