Plasma-enhanced catalytic oxidation of ethylene oxide over Fe–Mn based ternary catalysts

Zhu, Xinbo, Xiong, Haiping, Liu, Jin, Gan, Yuting, Xu, Zitan, Zhou, Chunlin, Wang, Yaolin ORCID: 0000-0003-1932-9810, Jiang, Ye and Tu, Xin ORCID: 0000-0002-6376-0897 (2022) Plasma-enhanced catalytic oxidation of ethylene oxide over Fe–Mn based ternary catalysts. Journal of the Energy Institute, 103. pp. 138-146.

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Abstract

In this work, Fe–Mn based ternary catalysts (Fe–Mn-X, X = Ce, Co and Cu) were evaluated in the plasma-catalytic oxidation of ethylene oxide (EO) using a cylindrical dielectric barrier discharge (DBD) reactor. The addition of transition metal dopants to the Fe–Mn catalyst significantly improved the performance of plasma-catalyzed EO oxidation compared to the reaction using plasma only and the Fe–Mn catalyst. The highest EO conversion (91.9%) and CO2 selectivity (78.9%) were obtained over the Fe–Mn–Co catalyst at a specific energy input (SEI) of 730.2 J l−1. Moreover, the presence of water vapor improved EO conversion and CO2 selectivity in the relative humidity (RH) range of 0–60%, while further increasing the RH to 80% reduced EO conversion. The interactions between Fe, Mn and dopants increased the specific surface area and pore volume of the Fe–Mn-X catalyst, while maintaining the crystalline structure of the catalysts. The presence of the dopants enhanced the reducibility of the Fe–Mn-X catalysts and produced more surface adsorbed oxygen (Oads) on the catalyst surfaces. Moreover, the interactive effects among the Fe, Mn and dopants facilitated the plasma-catalytic oxidation reactions via enhanced surface reactions. The coupling of plasma with the Fe–Mn–Co catalyst reduced the formation of organic by-products in the plasma-catalyzed oxidation of EO.

Item Type:	Article
Uncontrolled Keywords:	Non-thermal plasma, Plasma catalysis, Volatile organic compound, Ethylene oxide, Fe-Mn based catalysts, Advanced oxidation
Divisions:	Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science
Depositing User:	Symplectic Admin
Date Deposited:	27 Jun 2022 08:08
Last Modified:	18 Jan 2023 20:57
DOI:	10.1016/j.joei.2022.06.002
Open Access URL:	https://doi.org/10.1016/j.joei.2022.06.002
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3157213