Influence of Mn and Mg oxides on the performance of In2O3 catalysts for CO2 hydrogenation to methanol

In 2 O 3 , MnO/In 2 O 3 , and MgO/In 2 O 3 catalysts are synthesized by the co-precipitation method and investigated for CO 2 hydrogenation to methanol. The introduction of Mn and Mg oxides dramatically enhances the CO 2 adsorption capacity of In 2 O 3 . The changing trend of methanol selectivity is consistent with the CO 2 adsorption capacity. MnO/In 2 O 3 and MgO/In 2 O 3 catalysts show higher methanol selectivity compared with that of In 2 O 3 .