Turning a Methanation Co Catalyst into an In–Co Methanol Producer
Al Abdulghani, Abdullah
Hedhili, Mohamed N.
KAUST DepartmentAdvanced Membranes & Porous Materials Center
Advanced Membranes and Porous Materials Research Center
Biological and Environmental Sciences and Engineering (BESE) Division
Chemical Engineering Program
Chemical Science Program
Chemical and Biological Engineering
Imaging & Characterization Laboratory
Imaging and Characterization Core Lab
KAUST Catalysis Center
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Embargo End Date2020-07-05
Permanent link to this recordhttp://hdl.handle.net/10754/656006
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AbstractThe direct hydrogenation of CO2 to methanol using 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 combine a CO-producing In oxide catalyst with a methane-producing Co catalyst to obtain an In/Co catalyst for CO2 reduction to methanol. Density functional (DFT) simulations demonstrate that the charge transfer between the Co support and the In oxide film leads to enrichment of the surface of indium oxide with O vacancies, which serve as active sites for selective conversion of CO2 to methanol. Moreover, our simulations suggest that CO2 reduction on Co-supported In2O3–x films will preferentially yield methanol, rather than CO and methane. As a result, the prepared In@Co catalysts produce 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).
SponsorsThe authors gratefully acknowledge the European Synchrotron Radiation Facility (Grenoble, France) for provision of beamtime (CH-5572) for XAS experiments carried out on the CRG FAME UHD beamline (BM30) and support of their staff. The FAME-UHD project is financially supported by the French large loan EquipEx (EcoX, ANR-10-EQPX-27-01), the CEA-CNRS CRG consortium and the INSU CNRS Institute.
PublisherAmerican Chemical Society (ACS)