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Promotion Effect of SiO2 on the Catalytic Performance of Ni/CF for Biomass Derived Gas Reforming

A series of nickel-based carbon fiber prepared via ultrasonic-assisted impregnation method, were applied for biomass derived gas (CH4 and CO2) reforming. Results illustrated that parts of the carriers were consumed by CO2, followed by the deactivation of catalysts. In order to improve the catalytic activity and stability of the catalyst, a certain amount of silica was introduced into the 15%Ni/CF by hydrothermal synthesis method. The results demonstrated that the presence of silica species plays positive roles by inhibiting the reaction of carbon fiber and improving the metal support interaction. Additionally, hydrogen temperature-programmed reduction (H2-TPR), carbon dioxide temperature-programmed surface reaction (CO2-TPSR), scanning electron microscope (SEM) and X-ray diffraction (XRD) were used to characterize the morphology of the catalysts for the sake of illustrating the promotion mechanism of silica. At last, a process of carbon dioxide reforming methane on the Ni/SiO2–CF catalyst was proposed.