The Effect of Ce and Zr Loading over HZSM-5 to Produce Light Olefins from Naphtha

The effect of Ce and Zr loading over HZSM-5 to increase light olefin yields has been investigated in this research. Catalysts with 2 and 8% wt loading were synthesized by impregnation method. The physicochemical features of catalysts were characterized by mean of Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), Brunauer-Emmett-Teller (BET) and Temperature-Programmed Desorption (NH3-TPD). Performance of samples for naphtha thermal catalytic cracking at 650°C and 700°C, steam ratio 0.5 g/g and WHSV 60h-1 was reported. The maximum yield of light olefins achieved at 650˚C over 2%Zr/HZSM-5 due to moderate acidity.