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چکیده
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The Fe-Co-Ni nanocatalysts, prepared using co-precipitation method were studied for production of light olefins via Fischer -Tropsch synthesis. In present work, we studied the effect of a range of preparation variables, including the ageing time, temperature and pH of the precipitation also, reactor conditions consist of reaction temperature, pressure and H2/CO molar feed ratio on the morphology, structure and catalytic performance of samples. The optimal conditions are investigated with respect to catalytic performance for the conversion of synthesis gas (CO+H2) to ethylene and propylene. The catalyst containing a molar ratio of Fe: Co: Ni= 1:1:1 aged for 1 h, precipitated at 70 °C, pH of 9.3 in reaction conditions of P= 1 atm, T=300 °C and molar feed ratio H2/CO =1/1 performed optimally for the conversion of synthesis gas to desired products, ethylene and propylene. Characterization of precursors, fresh and used calcined catalysts were carried out using different instruments consist of X-ray diffraction (XRD), Thermal Gravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS) and Brunauer - Emmett-Teller (BET) surface area measurement
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