Coke resistance of Ni-based catalysts enhanced by cold plasma treatment for CH4–CO2 reforming: Review.

Carbon dioxide reforming of methane can reduce emissions of greenhouse gases, and has been extensively studied. The conventional Ni-based catalysts easily coke, sinter, and deactivate in the CRM reaction. The studies suggested that the cold plasma treatment can improve the structure of Ni-based catalysts, and so enhance coke resistance of the catalysts. The review summarized the effect of cold plasma treatment on the coke resistance of Ni-based catalysts for the CRM reaction. The main goal of the paper was to illuminate: the structure change of catalysts treated by cold plasma, such as crystal planes of Ni particles, the particles size of Ni, the Ni dispersion, the metal-support interaction, and CO 2 absorption capacity; the correlation between plasma treatment conditions (treatment way and parameters) and coke resistance of the catalyst treated by cold plasma; and the mechanism of plasma treatment to improve the coke resistance of the catalysts. • The plasma treatment enhances the coke resistance of Ni-based catalysts. • The correlation between the structure and coke resistance after plasma treatment. • The effect of plasma treatment ways and parameters on the coke resistance. • The mechanism of plasma treatment to improve the coke resistance of catalysts. [ABSTRACT FROM AUTHOR]