Ordered mesoporous carbon-supported mono-dispersed Co and Ru–Co catalysts for low-temperature CO2 methanation

Abstract

Developing advanced catalysts with high activity and low cost is a hot topic for CO2 methanation at low temperatures. Co/C catalysts with well-dispersed Co nanoparticles in the channels of the ordered mesoporous carbons have been synthesized with high specific surface area and uniform pore size. Then, size control and Ru incorporation have been conducted to promote the catalytic activity. The results show that Ru–Co/C catalysts with smaller particle size ([Formula: see text][Formula: see text]nm) and mono-dispersion achieve CO2 conversion rate of 31.7% and CH4 selectivity up to 75.8%. Importantly, Ru–Co/C catalysts yield 29.9% CO2 conversion and space-time yield (CH4) of 44.5 (mmol/gcat[Formula: see text]min) even at 5 bar. It demonstrates the important prospect of structured carbon-supported metal catalysts for low-temperature and low-pressure CO2 methanation.