Development of an Effective System for Oxidative Desulfurization of Motor Fuels

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05563
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
• Research Institution: University of Toyama
• Principal Investigator: Murata Satoru 富山大学, 学術研究部芸術文化学系, 教授 (70219921)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 軽油 / 酸化脱硫 / ジベンゾチオフェン / 酸素酸化 / ルテニウム触媒

Outline of Final Research Achievements

To develop an effective process for oxidative desulfurization of gasoil, we investigated oxidation of organic sulfur compounds by molecular oxygen-hydrocarbon solvents-Ru catalysts. We concentrated three subjects; (1) method to remove the sulfones from the oxidation products, (2) suppression of over-oxidation of the solvents, and (3) oxidation of hardly-oxidizable compounds. For the subject (1), polar solvents could be used for extraction of sulfones. For the subject (2), addition of the appropriate ligands such as pyridine suppress over oxidation. For the subject (3), the system could oxidize the hardly-oxidizable compounds such as benzothiophenes and 4,6-dimethyldibenzothiophe.

Free Research Field

石油化学、触媒化学

Academic Significance and Societal Importance of the Research Achievements

学術的な視点からは、芳香環縮合度の異なる基質、メチル基誘導体のような立体障害を有する基質の理論計算による反応性と実際の反応で得られた反応性との比較を行い、電子的な効果と立体的な効果が基質の反応性に及ぼす影響について考察を行った。また、Ru触媒にピリジン配位子を添加した場合の触媒活性への影響について知見が得られた。
社会的な意義としては、酸化脱硫の実用化を図る際に有用となる基礎的なデータが蓄積できた。