Catalytic hydrogenation of CO2 to olefins by Sr1-xKxFe0.5CoyO3
CUI Aixin
HOU Yuanhao
WU Man
GUO Tuo
GUO Qingjie
Abstract：The preparation of light olefins by CO2 hydrogenation is an important way to alleviate greenhouse effect.Meanwhile,this is of great significance in improving the self-sufficiency rate of light olefin in China.However,the catalyst with high conversion rates and selectivity towards target products is a prerequisite for achieving high yields.In order to enhance the yield of light olefins,a perovskite catalyst Sr1-xKxFe0.5CoyO3 was prepared by sol-gel method.This kind of catalyst have notable results with a CO2 conversion rate of 53.73％,a light olefin selectivity of 40.55％,and a yield of 21.79％.The characterization of catalysts reveal that the medium-strong basic sites and oxygen vacancy concentration are enhanced with addition of Co,which promote the activation of CO2.As a result,the conversion rate of CO2 has been improved.The Fischer-Tropsch synthesis reaction has been promoted with the doping of K.Thereby,the selectivity of light olefin has been improved.The precipitation of active metal phases,dissociative adsorption of C-O and facilitated subsequent C-C coupling are all enhanced by the co-doped Co/K.Thereby,CO2 conversion and light olefin selectivity are increased.
Keywords：perovskite catalystsCO2 hydrogenationlight olefinsconversionselectivity
Publication Date：2025-01-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 42-50 )