Fe-based multifunctional catalyst as well as preparation method and application thereof

Abstract

The invention provides a Fe-based multifunctional catalyst. The Fe-based multifunctional catalyst is formed by coupling a Na-ZnFe@C catalyst and a K-CuZnAl catalyst, wherein the Na-ZnFe@C catalyst is a carbonized Fe-based metal organic framework material (ZnFe-MOFs) loaded with sodium ions, and the K-CuZnAl catalyst is a CuZnAl catalyst which is loaded with potassium ions. According to the method, the coupling mode of different catalytic active components of the multifunctional catalyst is optimized, reverse water-gas conversion and Fischer-Tropsch synthesis carbon chain growth in the reaction process are considered, high-selectivity synthesis of ethanol through CO2 one-step hydrogenation is achieved, the CO2 conversion rate reaches up to 39.2%, the ethanol selectivity is 35.0%, and the olefin selectivity is 33.0%; The efficient synergistic effect among different catalytic active components is realized, meanwhile, the invention develops a new catalytic reaction path for preparing ethanol by CO2 hydrogenation, and has higher economic value and social benefit.

Description

technical field [0001] The invention relates to the technical field of chemical catalysis, in particular to an Fe-based multifunctional catalyst and its preparation method and application. Background technique [0002] Since the industrial revolution, countries have developed rapidly, and the energy consumption structure dominated by coal, oil and natural gas has led to the greenhouse gas carbon dioxide (CO 2 ) of massive emissions, as of now, CO in the atmosphere 2 The concentration has already exceeded the warning value (400ppm). This directly leads to a series of ecological and environmental problems such as global warming and sea level rise, which seriously threatens the survival and development of human beings. Therefore, reducing atmospheric CO 2 Concentration is particularly important. Especially the current call for carbon neutrality in my country, to achieve CO 2 The beneficial transformation of is imminent. [0003] with CO 2 Preparation of high-end chemical...

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Problems solved by technology

[0008] In summary, choosing different catalysts through different catalytic networks can achieve CO 2 Catalytic conversion to produce ethanol, however, the yield of ethanol is low, and the research on the reaction mechanism is not deep enough, and its real catalytic network is still unclear

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