Upgrading and Search for Scientific Principles of Treatment Technology of Refractory Pollutants by Catalytic Hydrothermal Oxidation

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K12223
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 64020:Environmental load reduction and remediation-related
• Research Institution: Osaka Metropolitan University (2022); Osaka City University (2020-2021)
• Principal Investigator: Kometani Noritsugu 大阪公立大学, 大学院工学研究科, 教授 (80295683)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 水熱酸化 / 触媒 / Cu / 4d遷移金属 / 1,4-ジオキサン / 3,4-ジクロロフェノール / 汚染水処理

Outline of Final Research Achievements

Single element catalysts of 4d transition metals and binary catalysts combining Cu and each 4d transition metal were synthesized, and the decomposition promotion effect on the hydrothermal oxidative decomposition of 3,4-dichlorophenol and 1,4-dioxane (reaction Conditions: 200°C, 10 MPa) have been evaluated. No significant catalytic activity was observed for transition metals other than Cu in single-element catalysts. On the other hand, it was found that Cu-Ni, Cu-Mo, and Cu-Rh catalysts have higher catalytic activity than single-element Cu catalysts. Catalyst characterization results before and after reaction suggested that the proportion of Cu reducing species was related to catalytic activity, and that electron transfer, especially between Cu and Mo and Rh, may have occurred.

Free Research Field

反応工学、触媒化学

Academic Significance and Societal Importance of the Research Achievements

ダイオキシンなどの難分解性有機汚染物質による地下水、河川、土壌の汚染が深刻な社会問題となっており、これらの汚染物質を安全かつ低コストで処理する技術に対するニーズが高まっている。本研究の成果は難分解性汚染物質の処理技術に対する新規シーズを提供するものであり、従来技術に比べて反応装置の簡素化、処理時の省エネルギー化を実現し、先行技術が抱える問題点を解決できると期待される。