Articles written in Journal of Chemical Sciences
Volume 132 All articles Published: 11 September 2020 Article ID 0124
The influences of sugars (sucrose, fructose and glucose) on the performance of FeAl catalysts were investigated for CO2 hydrogenation. FeAl catalysts were prepared with two steps. At first, the catalyst precursors were obtained by co-precipitation. During this step, three methods were used to add sucrose intothe precursors. Then, promoter K and Cu were impregnated into the precursors. The improved CO2 conversion and C5+ hydrocarbon selectivity by sucrose addition were attributed to the formation of c-Fe2O3 phase in the catalyst precursor, which was different from the popular opinion that sucrose acted as a chelating agent. With the inspiration from sucrose hydrolysis effect, FeAl oxide, mainly in c-Fe2O3 phase was prepared by adding fructose and glucose (the products of sucrose hydrolysis) into the newly centrifuged precipitate.The formation of c-Fe2O3 phase was explained based on the results of XRD and XPS. The best catalyst possessed CO2 conversion of 30.3% and C5+ selectivity of 52.2% under the reaction conditions of H2-:CO2 = 3:1, 6.0 L/(h.g-cat), 1.6 MPa and 235 °C.
Volume 132, 2020
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