@article {49721,
	title = {Hydrogenation of CO2 catalyzed by thermally decomposed cobalt-containing alkaline earth metal carbonates},
	journal = {Energy \& Fuels},
	volume = {39},
	year = {2025},
	month = {JUN},
	pages = {12982-12991},
	type = {Article},
	abstract = {<p>
	CO2 hydrogenation over Co catalysts supported on alkaline earth metal oxides was investigated. The catalysts were prepared by thermally decomposing alkaline metal carbonates CoMCO3, where M = Mg, Ca, Sr, and Ba, in H2. During the thermal activation, contingent upon the thermal stability of the precursor, it transformed into a composite of metal oxides, metals, and undecomposed metal carbonates. The thermal activation temperature, the ratio of CO2 to H2, the composition, and the basicity of the catalyst all played a significant role in influencing the conversion of CO2 and the selectivity to CH4. Among the various Co-containing alkaline earth metal carbonate precursors, CoCaCO3 activated at 400 degrees C yielded the highest steady-state CO2 conversion of 54\% with a CH4 selectivity of 89.8\% throughout 28 h in the reaction stream containing a 1:4 ratio of CO2 and H2. Detailed characterization showed that the CaCo-400 catalyst contained metallic Co, CaO, and undecomposed CaCO3 phases. The study assumes significance in understanding the role of the composition of catalysts in the formation of CO2 hydrogenation.</p>
},
	issn = {0887-0624},
	doi = {10.1021/acs.energyfuels.5c01793},
	author = {Gupta, Sharad and Vinod, C. P. and Poupin, Christophe and Jagadeesan, Dinesh}
}
