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Carbon dioxide (CO2) reforming of methane (CH4) over nickel (Ni)-supported SiO2 catalyst is a greener approach as this pathway transforms greenhouse gases into gas energy. SiO2 support was synthesized from waste palm oil fuel ash (POFA) with different Ni loading (Ni/SiO2). The SiO2(POFA) was synthesized by drying the treated POFA overnight and calcined at 600°C for 6 h. The Ni/SiO2 (POFA) catalyst with different Ni loading were synthesized by impregnation method. The physicochemical properties of the Ni/SiO2 (POFA) were characterized using nitrogen adsorption-desorption, x-ray diffraction (XRD), and fourier transform infrared (FTIR) spectroscopy. The catalytic performance of the Ni/SiO2 (POFA) was carried out at 800°C and atmospheric pressure with CO2/CH4 feed ratio of 1/1. The SiO2 (POFA) possess a good support material as it has a high surface area 6.95 m2 g−1 and assist well dispersion of Ni as evidenced by BET analysis. Higher catalytic activity was achieved at 53.10% of CO2 conversion and 67.6% of CH4 conversion over 5Ni/SiO2 (POFA). However, lower CO2 conversion of Ni/SiO2 (POFA) catalyst was due to the larger particle size of Ni and weak metal-support interaction in Ni/SiO2 (POFA). This finding proved that the waste POFA can replace the commercial SiO2 for catalytic gas reaction and solve the environmental problem.

Conversion of carbon dioxide and methane to syngas over Ni/SiO2 catalyst prepared from waste palm oil fuel ash