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Research Article | Open Access

Robust Joule-heating ceramic reactors for catalytic CO oxidation

Fangsheng LIUa, Zhibo ZHAOa, Yuyao MAa, Yi GAOa, Jiajie LIa, Xun HUa, Zhengmao YEa, Yihan LINGb( ), Dehua DONGa( )
School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
School of Materials and Physics, China University of Mining and Technology, Xuzhou 221116, China
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Abstract

Joule-heating reactors have the higher energy efficiency and product selectivity compared with the reactors based on radiative heating. Current Joule-heating reactors are constructed with electrically-conductive metals or carbon materials, and therefore suffer from stability issue due to the presence of corrosive or oxidizing gases during high-temperature reactions. In this study, chemically-stable and electrically-conductive (La0.80Sr0.20)0.95FeO3 (LSF)/Gd0.1Ce0.9O2 (GDC) ceramics have been used to construct Joule-heating reactors for the first time. Taking the advantage of the resistance decrease of the ceramic reactors with temperature increase, the ceramic reactors heated under current control mode achieved the automatic adjustment of heating to stabilize reactor temperatures. In addition, the electrical resistance of LSF/GDC reactors can be tuned by the content of the high-conductive LSF in composite ceramics and ceramic density via sintering temperature, which offers flexibility to control reactor temperatures. The ceramic reactors with dendritic channels (less than 100 µm in diameter) showed the catalytic activity for CO oxidation, which was further improved by coating efficient MnO2 nanocatalyst on reactor channel wall. The Joule-heating ceramic reactors achieved complete CO oxidation at a low temperature of 165 ℃. Therefore, robust ceramic reactors have successfully demonstrated effective Joule heating for CO oxidation, which are potentially applied in other high-temperature catalytic reactions.

Keywords

Joule heatingceramic reactormicrochannel reactortemperature controlCO oxidation

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Journal of Advanced Ceramics
Volume 11 Issue 7,
July 2022
Pages 1163-1171
DOI: 10.1007/s40145-022-0603-5
Cite this article:
LIU F, ZHAO Z, MA Y, et al. Robust Joule-heating ceramic reactors for catalytic CO oxidation. Journal of Advanced Ceramics, 2022, 11(7): 1163-1171. https://doi.org/10.1007/s40145-022-0603-5

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Received: 23 August 2021
Revised: 12 April 2022
Accepted: 22 April 2022
Published: 27 May 2022
© The Author(s) 2022.

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