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A novel process, combining direct CO2 capture from ambient air using K2CO3/Al2O3 composite sorbent and CO2 methanation in the presence of 4% Ru/Al2O3 catalyst, has been developed and tested in a cyclic mode. The thermal regeneration of the composite sorbent in these cycles has been carried out in H2 atmosphere at T = 325 °C with the gas flow going straight from the adsorber outlet to the preheated...
CO2 methanation over supported ruthenium catalysts is considered to be a promising process for carbon capture and utilization and power-to-gas technologies. In this work 4% Ru/Al2O3 catalyst was synthesized by impregnation of the support with an aqueous solution of Ru(OH)Cl3, followed by liquid phase reduction using NaBH4 and gas phase activation using the stoichiometric mixture of CO2 and H2 (1:4)...
Kinetics of CO2 methanation reaction over the commercial nickel catalyst NKM-2V was studied in a perfectly mixed reactor at T=250–350°C. It has been shown for the stoichiometric mixture of CO2 and H2 that both the catalyst activity and CO2 conversion increase with temperature. The decrease in CO2:H2 ratio at T=300°C have led to the rise of CO2 conversion to methane. The composite material K2CO3/Al...
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