2021 Fiscal Year Final Research Report
Development of bifunctional activity for highly active and durable catalysts for methane dehydroaromatization
| Project/Area Number |
19K05155
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 27030:Catalyst and resource chemical process-related
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| Research Institution | Saitama Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
田中 庸裕 京都大学, 工学研究科, 教授 (70201621)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | メタン脱水素芳香族化 / Mo/H-MFI触媒 / 炭化モリブデン活性種 / Mo L殻XANES |
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| Outline of Final Research Achievements |
For highly active Mo/H-MFI based catalysts with durable activity for methane dehydroaromatization, catalyst improvements were made in two categories: partial Ga introduction into the H-MFI (GaAl-MFImetallosilicates) and V co-modification into Mo on MFI-based supports. Their purpose is to prevent degradation of active Mo species, and prevent carbon deposition on strong acid sites of the H-MFI at the same time. As a result, trace V co-modification to Mo (Mo/V=10-40) was effective in suppressing the deterioration of MTB activity. It was concluded by Mo L-edge XANES study that the V co-modification effect contributed to the formation of over-carbonized Mo species with highly active one. On the other hand, partial Ga introduction (Al/Ga=100) on the H-MFI showed an inhibitory effect of carbon precipitation. From these results, it was concluded that these effects contribute to the bifunctional activity, i.e., high activity and durability of the methane dehydroaromatization catalysts.
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| Free Research Field |
触媒化学
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| Academic Significance and Societal Importance of the Research Achievements |
天然ガスからの直接資源化プロセスの高活性化・高耐久化は、近年とくに問題が顕在化する石油枯渇と価格高騰に対する技術的問題解決のみならず、LNG資源化とそこで要求されるエネルギー低減に極めて有効であることが強調される。本研究で目指す、Mo/H-MFI触媒の実用化までの難関と位置づけられる課題の克服は、化学的安定なメタンの高転化と、ベンゼン等への直接転換プロセスで不可避となっている炭素析出による触媒失活の抑制を同時に克服する目的であることから、本研究成果が今後の実用化への促進に直結することが期待できる。同時に、炭素析出と並行したMo活性種の活性低下要因の検討が失活抑制の具体策となることも期待される。
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