Converting CO2to light olefins (ethylene, propylene) is desirable mainly for two purposes: one is to alleviate the greenhouse gas emissions; the other is to produce valuable raw materials for a wide variety of polymer synthesis. Tremendous efforts have been employed, but highly efficient catalysts and selective pathways to enhance the conversion of CO2is still demanding due to the thermodynamically stable nature of the CO2molecule. Herein, we report an efficient and unexpensive catalyst that enables the convertion of CO2to light olefins. An Fe2O3supported Cu-Co catalyst was synthesized via a wetness incipient impregnation method. The synthesized catalysts were tested for CO2hydrogenation through a flow bed reactor at different temperatures using on-line GC analysis. Catalyst selectivity and conversion of Cu-Co bimetallic catalyst were compared with Cu-, Co- monometallic catalyst for the production of light olefins as a function of temperature. Pulse CO Chemisorption was performed to compare the number of active sites and temperature-programmed reduction (TPR) was carried out to compare the reducibility of active metals and to investigate the alloy formation of the bi-metallic catalysts. Other catalyst characterizations such as x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD) and thermogravimtetic analysis (TGA) are to be carried out with an aim to establish relationships between activity and properties. This study will provide more insights into understanding the role of Cu, Co and Fe in the reaction pathway for CO2with H2to light olefins.

Catalytic conversion of carbon dioxide via hydrogenation to light olefins over Fe2O3 supported Cu-CO catalysts

2019 Spring National Meeting

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