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Journal of Advanced Ceramics 2022, 11(7): 1163-1171 https://doi.org/10.1007/s40145-022-0603-5
Research Article | Open Access | Issue | Published: 27 May 2022

Robust Joule-heating ceramic reactors for catalytic CO oxidation

Show Author's Information 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
Keywords:
CO oxidation, Joule heating, temperature control, ceramic reactor, microchannel reactor
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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Abstract Full text About this article

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.


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About this article

Robust Joule-heating ceramic reactors for catalytic CO oxidation

Show Author's information 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

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: CO oxidation, Joule heating, temperature control, ceramic reactor, microchannel reactor

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Publication history

Received: 23 August 2021
Revised: 12 April 2022
Accepted: 22 April 2022
Published: 27 May 2022
Issue date: July 2022

Copyright

© The Author(s) 2022.

Acknowledgements

Prof. Dehua DONG acknowledges the financial support by the National Natural Science Foundation of China (51872123) and Jinan Science and Technology Bureau (2020GXRC033).

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