Preparation and Characterization of CoMn/TiO2 Catalysts for Production of Light Olefins

Abstract

A series of x(Co, Mn)/TiO 2 catalysts (x=2-12wt.%) containing 25%Co and 75%Mn were prepared by the co-impregnation method. All prepared catalysts have been tested in Fischer- Tropsch synthesis for production of C 2-C4 olefins. It was found that the catalyst containing 8wt.%(Co,Mn)/TiO 2 is an optimal catalyst for production of C 2-C4 olefins. The effect of operation conditions such as the H 2/CO molar feed ratios, temperature, Gas Hourly Space Velocity (GHSV) and total reaction pressure on the catalytic performance of optimal catalyst was investigated. Characterizations of both precursors and catalysts were carried out using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET) specific surface area measurement, Thermal Gravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC).