| Abstract: | Direct converting carbon dioxide into hydrocarbon fuels and value-added chemicals would offer a very attractive approach for efficient utilization of CO_2 as a carbon resource.Although,olefins,aromatics and gasoline have been successfully synthesized by CO_2 hydrogenation,highly selective conversion of CO_2 and H_2 into C_(2+) hydrocarbon is still challenging due to a high C-C coupling barrier and inhibiting the production of other long-chain hydrocarbons.Here,we report a composite catalyst made of InZrO_x and SSZ-13 molecular sieve(InZrO_x+SSZ-13),which exhibits 74.5% propane selectivity at 623 K.The8-MR micropores and the higher strength of the acid for SSZ-13 benefit the formation of propane.Compared with pure InOx and m-ZrO_2 the composite oxide InZrO_x containing more oxygen vacancies,exhibits to be more readily reduced by H_2 and easier to adsorb and desorb CO_2 within the reaction temperature.All those could be beneficial to the activation and conversion of H_2 and CO_2.The catalytic performance of InZrO_x+SSZ-13 in CO_2 hydrogenation provides a potential for production of propane. |
