Catalytic oxidation of NO and toluene by supported perovskite LaCoO3/MO2

ZHANG Na; HUANG Yan; ZHANG Jun-feng; ZHAO Ling-kui; LI Si-mi; TAO Hong-fan; WU Yun-fan

doi:10.19906/j.cnki.JFCT.2022007

Volume 50 Issue 7

Aug. 2022

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ZHANG Na, HUANG Yan, ZHANG Jun-feng, ZHAO Ling-kui, LI Si-mi, TAO Hong-fan, WU Yun-fan. Catalytic oxidation of NO and toluene by supported perovskite LaCoO3/MO2[J]. Journal of Fuel Chemistry and Technology, 2022, 50(7): 868-876. doi: 10.19906/j.cnki.JFCT.2022007

Citation:

ZHANG Na, HUANG Yan, ZHANG Jun-feng, ZHAO Ling-kui, LI Si-mi, TAO Hong-fan, WU Yun-fan. Catalytic oxidation of NO and toluene by supported perovskite LaCoO₃/MO₂[J]. Journal of Fuel Chemistry and Technology, 2022, 50(7): 868-876. doi: 10.19906/j.cnki.JFCT.2022007

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Catalytic oxidation of NO and toluene by supported perovskite LaCoO₃/MO₂

doi: 10.19906/j.cnki.JFCT.2022007

School of Environment and Resources, Xiangtan University, Xiangtan 411105, China

Funds: The project was supported by Key Research and Development Project of Hunan Province (2019SK2071), Hunan Province Strategic Emerging Industry Scientific and Technological Breakthroughs and Major Scientific and Technological Achievements Transformation Project (2019GK4027)

Received Date: 2021-12-20
Accepted Date: 2022-01-24
Rev Recd Date: 2022-01-19

Available Online: 2022-04-13

Publish Date: 2022-07-10

Abstract

Abstract

A series of LaCoO₃/MO₂ catalysts were prepared by support different carriers (M = Zr, Ti, Ce) through the citric acid sol-gel method, and the catalytic oxidation performance of toluene and NO and critical mechanism were investigated. The results found that the LaCoO₃/CeO₂ catalyst with CeO₂ as the carrier exhibited the best catalytic oxidation performance, the conversion rate of NO reached 68% at 300 ℃ and t₉₀ of toluene was 245 ℃. The physical and chemical properties and microstructure of the supported perovskite catalysts were characterized by BET, XRD, H₂-TPR, XPS technologies. The results showed that the supported perovskite had a larger specific surface area. Meanwhile, the supported perovskite catalyst had more active lattice oxygen and better redox performance. Moreover, the interaction between Co and Ce ions existed in the contact interface of LaCoO₃ and the carrier CeO₂, which was conducive to the formation of oxygen vacancies, thus providing more active sites for the reaction. The reaction mechanism was further explored by in-situ DRIFTs. NO oxidation on LaCoO₃/CeO₂ catalyst followed the Langmuir-Hinshelwood mechanism, and toluene oxidation followed the Mars-van Krevelen mechanism.
- DOC,
- supported perovskite,
- catalytic oxidation,
- NO,
- toluene

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References(33)

References

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