Novel inorganic precursors [Co_(4.32)Zn_(1.68)(HCO_2)_(18)(C_2H_8N)_6］/SiO_2 and Co_(4.32)Zn_(1.68)(HCO_2)_(18)(C_2H_8N)_6］/Al_2O_3 for Fischer-Tropsch synthesis

摘要

AbstractThe silica- and alumina-supported Co–Zn catalysts were synthesized by thermal decomposition of new inorganic precursors [Co4.32Zn1.68(HCO2)18(C2H8N)6]/SiO2or Al2O3. A novel coordination polymer formulated as [Co4.32Zn1.68(HCO2)18(C2H8N)6] (1) was prepared using the solvothermal technique and characterized by elemental analysis, FT-infrared spectroscopy. Thermal stability of the complex1was investigated by thermogravimetric analysis and differential scanning calorimetry, and its structure was determined by single-crystal X-ray diffraction. Characterization of catalysts was carried out using powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and BET specific surface area. The catalysts were evaluated for Fischer–Tropsch synthesis (FTS) in the temperature range 200–300 °C. The results revealed that the synthesized catalysts have higher selectivity to the desired products at 260 °C. The performance of the catalysts was compared to those of catalysts constructed via impregnation method and the fabricated catalysts show higher activity and selectivity than the reference catalysts.Graphical abstractDisplay OmittedHighlights•The Co–Zn catalysts were synthesized through new inorganic precursors.•The synthesized catalysts are more active than impregnation reference samples.•The fabricated catalysts have higher selectivity to olefins than reference samples.