Cuagce-c catalyst, its preparation method and application in methanol production by carbon dioxide hydrogenation

Abstract

The application belongs to the technical field of carbon dioxide conversion application and catalyst fine synthesis, and particularly relates to a CuAgCe-C catalyst, a preparation method thereof and application of the CuAgCe-C catalyst in carbon dioxide hydrogenation to prepare methanol. The CuAgCe-C catalyst comprises a copper-silver composite, CeO2 and biomass carbon; the copper-silver composite contains Cu and Ag, and at least part of Cu and Ag exists in the form of Cu-Ag alloy. The key of the application is that biomass material is used as a carbon source and a reducing agent, which can reduce Ag and Cu to obtain the copper-silver composite comprising at least Cu-Ag alloy in the pyrolysis process, and can also be used as a carbon source to obtain biomass carbon with a high specific surface area as a carbon carrier of the catalyst after pyrolysis, and CeO2 is further introduced on this basis, so that the obtained CuAgCe-C catalyst exhibits excellent catalytic activity in the process of carbon dioxide hydrogenation to prepare methanol, has a high CO2 conversion rate, methanol selectivity and methanol space-time yield, and excellent catalytic stability.

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