Methanol Synthesis from CO2 and H2 over CuO-ZnO Catalysts Combined with Metal Oxides under 13 atm Pressure

Article abstract of DOI:10.1246/bcsj.64.1658

The synthesis of methanol from CO2 and H2 in a flow reactor was studied over CuO-ZnO catalysts combined with ZrO2, MgO, Al2O3, or Cr2O3 under a pressure of 13 atm.CuO-ZnO-Al2O3, CuO-ZnO-ZrO2, and CuO-ZnO-MgO showed higher activity and higher selectivity for methanol than did CuO-ZnO.The selectivity for methanol formation became higher as the reaction temperature was lower, or any of the H2/CO2 ratio, the pressure and the space velocity were higher.On the basis of analyses by XRD, XPS and ultraviolet diffused reflectance spectroscopy, the active centers of CuO-ZnO-ZrO2 seem to be a Cu⁺-ZnO species stabilized by ZrO2.