Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Methane Dry Reforming Catalysts Based on Pr-doped Ceria-Zirconia Synthesized in Supercritical Propanol

Version 1 : Received: 8 May 2023 / Approved: 9 May 2023 / Online: 9 May 2023 (08:53:37 CEST)

A peer-reviewed article of this Preprint also exists.

Arapova, M.; Smal, E.; Bespalko, Y.; Valeev, K.; Fedorova, V.; Hassan, A.; Bulavchenko, O.; Sadykov, V.; Simonov, M. Methane Dry Reforming Catalysts Based on Pr-Doped Ceria–Zirconia Synthesized in Supercritical Propanol. Energies 2023, 16, 4729. Arapova, M.; Smal, E.; Bespalko, Y.; Valeev, K.; Fedorova, V.; Hassan, A.; Bulavchenko, O.; Sadykov, V.; Simonov, M. Methane Dry Reforming Catalysts Based on Pr-Doped Ceria–Zirconia Synthesized in Supercritical Propanol. Energies 2023, 16, 4729.

Abstract

This work is devoted to the study of active and stable nickel catalysts for methane dry reforming based on Pr-doped ceria-zirconia obtained by solvothermal continuous method. The studies of physicochemical and catalytic properties of the 5%Ni\Ce0.75Zr0.25-xPrxO2 series showed that Pr introduction leads to an increase in the amount of highly reactive oxygen of the oxide lattice. Praseodymium-based catalysts showed significantly higher reactant conversions. In addition to the nature of support, the method of nickel introduction was also studied - Ni was added both by impregnation and one-pot with mixed oxide preparation. The method of Ni addition was shown to have significant effect on the morphology of the supported active component and, respectively, on the catalytic activity. The 5%Ni/Ce0.75Zr0.15Pr0.1O2 catalyst prepared by one-pot method showed stable operation in the MDR reaction for 30 hours at CO2 and CH4 conversions of ~40% and an H2 yield of ~18% (Т=700°С, τ=10ms).

Keywords

dry reforming; methane; ceria-zirconia; supercritical synthesis; oxygen vacancies; stability

Subject

Chemistry and Materials Science, Nanotechnology

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