2023 Fiscal Year Final Research Report
Microwave-assisted catalytic process for adsorption/condensation and rapid thermal decomposition of low-concentration pollutants
| Project/Area Number |
21H03635
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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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| Review Section |
Basic Section 64020:Environmental load reduction and remediation-related
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
宮脇 仁 九州大学, 先導物質化学研究所, 准教授 (40505434)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | マイクロ波 / 複合酸化物 / 揮発性有機化合物 |
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| Outline of Final Research Achievements |
Microwave-assisted heterogeneous catalytic oxidation of benzene was investigated over Cu-Mn spinel oxides. Microwave absorption by the Cu-Mn oxide is mainly driven by dielectric losses. Cu-Mn oxide exhibited superior activity to single oxides under microwave heating, demonstrating a lower apparent activation energy than that obtained under conventional heating. Microwave irradiation lowered the reaction temperature required for benzene oxidation compared with conventional heating. Transient tests were used to investigate the reactivity of oxygen species in the catalytic reaction, and the high reactivity of Cu-Mn spinel oxides was related to the high reactivity of lattice oxygen on the catalyst surface. The reactivity of the oxygen species was enhanced under microwave heating, leading to an enhanced benzene oxidation reaction. The combination of adsorption and catalytic oxidation processes using Cu-Mn spinel oxides and zeolites efficiently decomposed benzene at low concentrations.
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| Free Research Field |
触媒化学
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| Academic Significance and Societal Importance of the Research Achievements |
工場、事業所から排出される低濃度の揮発性有機化合物（VOC）の処理の高効率化は環境保全の観点から喫緊の課題である。本研究では、複合酸化物触媒の高いマイクロ波加熱特性を生かし、VOCの吸脱着と濃縮、酸化分解過程を速やかに進行させる高効率汚染物質処理プロセスを開発し、その有効性について実証した。VOC吸着特性とマイクロ波照射下での昇温特性を両立するプロセスを構築し、高い昇温特性と酸化特性を有する酸化物触媒を開発し、これらの特性を生かすことで高効率VOC分解プロセスを構築した。この成果は、マイクロ波化学分野、触媒化学分野において重要な進歩であるとともに、環境技術への展開が見込まれる。
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