Study on CO2 Hydrogenation to Light Olefins on Iron Catalysts

Cheng Xue Wang; Xiang Bo Wang

doi:10.4028/www.scientific.net/AMR.347-353.808

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 347-353Study on CO2 Hydrogenation to Light Olefins on...

Study on CO₂ Hydrogenation to Light Olefins on Iron Catalysts

Abstract:

Fe-Cu-K₂O-La₂O₃ catalysts were prepared by special impregnation on the SiO₂, ZrO₂ and SiO₂-ZrO₂. Some factors of influence on catalytic activity were researched,such as the content of active component Cu and La, calcination temperature, reaction temperature and space velocity. The structures and physicochemical properties of the catalysts were characterized by XRD and TEM. When the SiO₂-ZrO₂ play the role of carrier , Fe:Cu:K:La = 100:15:7:7:250:250, the calcination temperature is 773K, the reaction temperature is 613K and space velocity is 2400ml • h^-1 • g^-1 _(cat), the catalyst shows the best catalytic activity , if the reaction pressure is 0.1 Mpa , and the molar ratio of H₂ to CO₂ is 3 . The conversion of CO₂ is more than 64%. Light olefin’s selectivity is more than 25%.