High Performance Ru-CN x /CeO 2 Catalyst for Catalytic Wet Oxidation of N-Methyldiethanolamine in Water

Yuantao Han, Yuchuan Ye, Wanjin Yu, Shaohong Zang, Lili Ji, Shijie Li and Liuye Mo ()
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Yuantao Han: School of Petrochemical & Environment, Zhejiang Ocean University, Zhoushan 316022, China
Yuchuan Ye: School of Petrochemical & Environment, Zhejiang Ocean University, Zhoushan 316022, China
Wanjin Yu: State Key Lab Fluorinated Greenhouse Gases Replacement Control and Treatment, Zhejiang Research Institute of Chemical Industry, Hangzhou 310023, China
Shaohong Zang: National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
Lili Ji: National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
Shijie Li: National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
Liuye Mo: School of Petrochemical & Environment, Zhejiang Ocean University, Zhoushan 316022, China

Sustainability, 2025, vol. 17, issue 10, 1-20

Abstract: The synthesis of high performance catalysts for the catalytic wet oxidation (CWO) of N-methyldiethanolamine (MDEA) in water remains a challenge, and is a topic of considerable importance in relation to sustainability. In this paper, a Ru-CN x /CeO 2 catalyst was synthesized through a modified impregnation process for the CWO of MDEA, exhibiting a high activity of 80% COD removal at 180 °C and 2.5 MPa. EPR, Raman, and XPS characterizations revealed that the CN x species facilitated the reduction in Ru 4+ to Ru 0 species and enhanced the Ru–Ce interaction to form a high-density Ru-O-Ce structure with Ce 3+ sites, which strongly correlate to the generation of oxygen vacancies. The oxygen vacancies enabled the adsorption and activation of the oxygen, generating active species (h + , ·O 2 − , and ·OH) that effectively oxidized the MDEA during the catalytic reaction.

Keywords: sustainability; wastewater; N-methyldiethanolamine; catalytic wet oxidation; CN x; Ru/CeO 2 catalyst; oxygen vacancy (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2025
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