Abstract: A 10%Co/TiO2 catalyst has been synthesized by incipient wetness impregnation method and tested in a fixedbed reactor at 20 bar and various temperatures to assess the effect of operating temperature on Fischer-Tropsch (FT) reaction. Increasing the operating temperature (from 200oC - 220oC) led to an increase in methane and light product selectivity but increased the CO conversion rate and the net C5+ production rate. Apparent activation energy for CO conversion and light alkanes (up to C4) formation has also been estimated using Arrhenius plot