(671g) Catalytic Conversion of Syngas to Liquid Hydrocarbons Over Potassium Promoted Cobalt/SiO2 Catalyst

One of the promising approaches is synthetic liquids produced by the Fischer?Tropsch (FT) process, which has received increasing attention worldwide due to technical advances and growing reserves of natural gas. Fischer-Tropsch Synthesis (FTS), in which conversion of natural gas and syngas (product of coal and biomass gasification) into a mixture of straight chain paraffinic and olefinic hydrocarbons. In the present research different types SiO2-supported cobalt based catalysts have been synthesized by solgel and impregnation method for Fischer Tropsch synthesis. The catalysts were characterised by BET surface area, pore volume, TGA, TPR, SEM, TEM, Chemisorption technique. The catalysts were found to be composed of Co3O4 as the major phase revealed from XRD result. Incorporation of promoter reduced the catalyst surface area. The surface morphology from SEM result revealed that the particles were in agglomerated form and catalyst particles sizes were varied from 10 to 50 nm. The reduction temperature was found less than 450°C, but it was higher when promoter was addedThe Fischer?Tropsch synthesis (FTS) performance of the catalysts was studied in a fixed bed BTRS reactor. Catalysts were tested at 250°C and 20 bar pressure having W/Fo=1000 kg(catalyst).s/Nm3. The effects of the addition of potassium as promoter was also investigated. The percentages CO conversion and C5+ selectivity was found to be low for catalysts made by sol gel method. The highest C5+ selectivity was obtained for ceria promoted catalyst.