Abstract
The 24%Fe-36%Ni/Al2O3 catalyst was prepared using sol-gel method. This research investigated many variable factors for conversion synthesis gas to C2–C4 light olefins by using Fisher-Tropsch synthesis. The effects of calcination atmospheres and calcination heating rates and also operation conditions such as the H2/CO molar feed ratios, gas hourly space velocity (GHSV), temperatures and total reaction pressure on the catalytic performance of 24%Fe-36%Ni/Al2O3 catalyst was investigated. The stability of the catalyst for 240 h has been tested at optimal operating conditions (T = 260°C, H2/CO = 2/1, GHSV = 3200 h−1 and P = 3 bar). The results indicated that this catalyst was highly stable for production C2–C4 light olefins. Characterization of precursors and calcined catalysts were carried out by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) specific surface area measurement, temperature program reduction (TPR) and thermal analysis methods such as thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC).
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