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• W2969704260 abstract "A series of layered K-Fe-Zn-Ti catalysts with different Zn/Fe molar ratios were prepared by high-temperature solid state reaction and characterized by SEM, TEM, XRD, H2-TPR, CO2-TPD, XPS, N2 sorption and TG measurements; the performance of K-Fe-Zn-Ti catalysts in the hydrogenation of CO2 to light olefins was investigated. The results indicate that the K-Fe-Zn-Ti catalysts have the typical layered structure with K2.3Fe2.3Ti5.7O16 as the main phase. ZnFe2O4 appears on the Zn promoted K-Fe-Zn-Ti catalysts, which may reduce the crystallinity, enhance the surface basicity, and promote the adsorption of CO2. The K-Fe-Zn-Ti catalysts exhibit high selectivity to olefins in CO2 hydrogenation; the ratio of olefins to paraffins in the products (O/P) is higher than 6.5. The addition of Zn can enhance the formation of C+ 5 hydrocarbons and especially C+ 4 linear alpha-olefins (LAOs); the content of LAOs in C+ 4 hydrocarbons over Zn promoted K-Fe-Zn-Ti reaches 75.2%, in comparison with the value of 54.6% over the Zn-free K-Fe-Ti catalyst. In particular, the 0.8K-1.8Fe-0.6Zn-1.3Ti catalyst displays the highest O/P value (7.8), although the effect of Zn content in the Zn-promoted K-Fe-Zn-Ti catalysts on the yield of heavy hydrocarbons and selectivity to alpha-olefins is less significant. Moreover, the K-Fe-Zn-Ti catalysts display high stability in CO2 hydrogenation and the LMO structure remains almost intact after a long term reaction test of 100 h." @default.
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• W2969704260 date "2019-08-01" @default.
• W2969704260 modified "2023-10-16" @default.
• W2969704260 title "Preparation of layered K-Fe-Zn-Ti catalyst and its performance in the hydrogenation of carbon dioxide to light olefins" @default.
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• W2969704260 doi "https://doi.org/10.1016/s1872-5813(19)30040-4" @default.
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