Highly Active Catalytic CO Hydrogenation to Lower Olefins via Spinel ZnGaO Combined with SAPO-34.

A key primary method for creating a carbon cycle and carbon neutrality is the catalytic hydrogenation of CO into high value-added chemicals or fuels. In this work, ZnGaO oxides were prepared by parallel co-precipitation and physically mixed with SAPO-34 molecular sieves prepared by hydrothermal synthesis to produce ZnGaO /SAPO-34 bifunctional catalysts, which were evaluated for the catalytic synthesis of lower olefins (C -C ) from carbon dioxide hydrogenation. It was demonstrated that the reaction process requires oxygen defect activation, synergistic hydrogenation, and CO alkaline adsorption of ZnGaO .