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Turning a Methanation Catalyst into a Methanol Producer: In-Co Catalysts for the Direct Hydrogenation of CO2 to Methanol

preprint
submitted on 15.11.2018 and posted on 16.11.2018 by Anastasiya Bavykina, Irina Yarulina, Lieven Gevers, Mohamed Nejib Hedhili, Xiaohe Miao, Adrian Ramirez, Oleksii Pustovarenko, Alla Dikhtiarenko, Amandine Cadiau, Samy Ould-Chikh, Jorge Gascon

The direct hydrogenation of CO2 to methanol using green hydrogen is regarded as a potential technology to reduce greenhouse gas emissions and the dependence on fossil fuels. For this technology to become feasible, highly selective and productive catalysts that can operate under a wide range of reaction conditions near thermodynamic conversion are required. Here, we demonstrate that indium in close contact with cobalt catalyses the formation of methanol from CO2 with high selectivity (>80%) and productivity (0.86 gCH3OH.gcatalyst-1.h-1) at conversion levels close to thermodynamic equilibrium, even at temperatures as high as 300 °C and at moderate pressures (50 bar). The studied In@Co system, obtained via co- precipitation, undergoes in situ transformation under the reaction conditions to form the active phase. Extensive characterization demonstrates that the active catalyst is composed of a mixed metal carbide (Co3InC0.75), indium oxide (In2O3) and metallic Co.

History

Email Address of Submitting Author

jorge.gascon@kaust.edu.sa

Institution

King Abdullah University of Science and Technology

Country

Saudi Arabia

ORCID For Submitting Author

0000-0001-7558-7123

Declaration of Conflict of Interest

No conflict of interest

Version Notes

Version 1.0

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