Catalyst for preparing hydrocarbons from carbon dioxide by one-step hydrogenation and method for preparing same

A method for preparing a catalyst wherein the catalyst is used for preparing hydrocarbons from carbon dioxide by one-step hydrogenation, the catalyst comprises nano-metal oxides and hierarchical zeolites, the mass fraction of the nano-metal oxides in the catalyst is 10%-90%, and the mass fraction of the hierarchical zeolites in the catalyst is 10%-90%, and the method comprises:

• 1) dissolving a metal salt in a first solvent to prepare a metal salt solution;
• 2) dissolving a precipitant in a second solvent to prepare a precipitant solution;
• 3) dropwise adding the precipitant solution obtained in step 2) to the metal salt solution obtained in step 1) to generate a precipitation mother solution by reaction;
• 4) aging the precipitation mother solution, and then washing, drying and calcining to obtain metal oxides;
• and
• 5) mixing the metal oxides obtained in step 4) with hierarchical zeolites according to the composition of the catalyst to prepare a composite catalyst.

A method for preparing hydrocarbons from carbon dioxide by one-step hydrogenation, comprising

• preparing a catalyst, wherein the catalyst comprises nano-metal oxides and hierarchical zeolites, the mass fraction of the nano-metal oxides in the catalyst is 10%-90%, and the mass fraction of the hierarchical zeolites in the catalyst is 10%-90%;
• feeding reactant gas mixture of H2 and CO2 into a reactor;
• and
• using a catalyst for the hydrogenation reaction of preparing hydrocarbons from carbon dioxide.