Degradation of gas-phase o-xylene via combined non-thermal plasma and Fe doped LaMnO 3 catalysts: Byproduct control.

Autor: Shou T; College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China; Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Hangzhou, China., Li Y; College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China; Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Hangzhou, China., Bernards MT; Department of Chemical and Materials Engineering, University of Idaho, Moscow, 83844, USA., Becco C; Department of Chemical and Biological Engineering, University of Wisconsin, Madison, Wisconsin, 53706, USA., Cao G; College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China., Shi Y; College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China; Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Hangzhou, China., He Y; College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China; Department of Chemical Engineering, University of Washington, Seattle, Washington, 98195, USA. Electronic address: yihezj@zju.edu.cn.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2020 Apr 05; Vol. 387, pp. 121750. Date of Electronic Publication: 2020 Jan 07.
DOI: 10.1016/j.jhazmat.2019.121750
Abstrakt: A series of Fe doped LaMnO 3 catalysts were prepared to control the production of byproducts such as O 3 , N 2 O, and CO, during the degradation of volatile organic compounds with a non-thermal plasma. Eliminating these potentially toxic byproducts will make non-thermal plasma technologies applicable for a wider range of commercial applications. The modified LaMnO 3 catalysts are combined in NTP-catalysis reactor with optimal configuration. Experimental results show that doping Fe on LaMnO 3 catalysts can not only enhance the oxidation of o-xylene, but also lower the emission levels of byproducts. LaMn 0.9 Fe 0.1 O 3 catalyst shows the best catalytic activity among the formulations tested herein. In addition to the strong mineralization of 88.1 %, the catalyst has the highest performance for o-xylene conversion (91.3 %), O 3 inhibition efficiency (84.9 %), and N 2 O inhibition efficiency (61.2 %) due to the strong concentration of active oxygen species on the surface of the catalyst. Moreover, the high reducibility of Fe 3+ demonstrated with H 2 -TPR (hydrogen temperature-programed reduction) further enhances the removal of O 3 by oxygen species exchange between Mn 3+ /Mn 4+ and Fe 2+ /Fe 3+ .
Competing Interests: Declaration of Competing Interest There are no conflicts of interest to declare.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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