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

This paper is devoted to the study of active and stable nickel catalysts for methane dry reforming based on Pr-doped ceria-zirconia obtained via the solvothermal continuous method. Studies on the physicochemical and catalytic properties of the 5%Ni/Ce0.75Zr0.25-xPrxO2 series have showed that Pr introduction leads to an increase in the amount of highly reactive oxygen in 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 using impregnation and the one-pot procedure with mixed oxide preparation. The method of Ni addition was shown to have significant effect on the morphology of its particles and Ni-support interaction, and, respectively, on catalytic activity and coking stability. The 5%Ni/Ce0.75Zr0.15Pr0.1O2 catalyst prepared by one-pot method showed stable operation in the MDR reaction for 30 h at CO2 and CH4 conversions of similar to 40% and an H-2 yield of similar to 18% (T = 700 & DEG;C, tau = 10 ms).

Automated summary

This paper focuses on the exploration of active and stable nickel catalysts for methane dry reforming using Pr-doped ceria-zirconia obtained via the solvothermal continuous method. It is found that the introduction of Pr increases the amount of highly reactive oxygen in the oxide lattice, leading to significantly higher reactant conversions. The method of nickel introduction has a significant impact on the morphology of the particles, Ni-support interaction, catalytic activity, and coking stability.