Elucidating the growth mechanism of aromatic hydrocarbons at high temperatures

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K04318
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 19020:Thermal engineering-related
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Matsugi Akira 国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 主任研究員 (90634668)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 高温化学反応 / 衝撃波管 / 過渡吸収分光法 / 芳香族化合物 / 単分子反応論

Outline of Final Research Achievements

To elucidate the reaction mechanisms for the hydrocarbon growth in high temperature environments, the experimental and theoretical studies have been conducted on the reaction mechanisms of some aromatic hydrocarbons. Experimentally, aromatic compounds were pyrolyzed using a high repetition rate shock tube, and the behavior of the intermediate species produced by the pyrolysis was probed by transient absorption spectroscopy. The results were analyzed with detailed kinetic models to elucidate the reaction mechanism. In the theoretical study, unimolecular reaction theory was applied to the reactions involved in the growth of aromatic compounds. In particular, the reaction mechanisms for the formation of tricyclic compounds from the recombination reactions of hydrocarbon radicals were elucidated.

Free Research Field

燃焼化学

Academic Significance and Societal Importance of the Research Achievements

炭化水素化合物の燃焼および熱分解過程において進行する分子成長反応のメカニズムを解明することは、低環境負荷な燃焼技術の研究開発をはじめ多くの応用に資する重要な課題である。本研究では、芳香族化合物の熱分解に起因する様々な反応挙動を実験的に追跡するとともに、芳香族ラジカル種が関与するいくつかの分子成長反応の反応経路を明らかにしたことで、芳香族化合物およびラジカルの反応機構に関する新たな知見が得られた。これらは、燃焼における芳香族化合物の反応過程と多環芳香族炭化水素の生成に関する化学反応モデルの信頼性向上に貢献する成果である。