CO_(2)hydrogenation to methane is an interesting topic that can result in CO_(2)mitigation,providing a solution for global warming.Using a sustainable catalyst in that process will be considered as a plus point that m...CO_(2)hydrogenation to methane is an interesting topic that can result in CO_(2)mitigation,providing a solution for global warming.Using a sustainable catalyst in that process will be considered as a plus point that makes the whole system(material+application)an eco-friendly process.Therefore,scientists have focused on the biochar-supported catalysts used in the CO_(2)methanation.The use of cobalt(Co)catalysts supported on sugarcane bagasse biochar(SCBB)has not been investigated for the methanation of CO_(2).Therefore,this work investigated the Co/SCBB systems in the CO_(2)methanation with different Co loadings starting from 0.1 to 0.8 mmol_(Co-salt)/g_(SCB).In addition,the effect of Ce was studied,proving that Ce addition improved the catalytic activity significantly,as the catalyst 0.5Co-0.25Ce/SCBB showed the foremost conversion of CO_(2)(60%at 500℃)and the best selectivity of methane(80%at 430℃).This research lays the foundation for utilizing Ce to enhance the catalytic properties of various transition metals that can not offer high catalytic activity alone in the carbon dioxide methanation.展开更多
基金supported by the Qatar National Research Fund(QRDI),a member of the Qatar Foundation,through the National Priority Research Program Grant(ARG01-0530-230416).
文摘CO_(2)hydrogenation to methane is an interesting topic that can result in CO_(2)mitigation,providing a solution for global warming.Using a sustainable catalyst in that process will be considered as a plus point that makes the whole system(material+application)an eco-friendly process.Therefore,scientists have focused on the biochar-supported catalysts used in the CO_(2)methanation.The use of cobalt(Co)catalysts supported on sugarcane bagasse biochar(SCBB)has not been investigated for the methanation of CO_(2).Therefore,this work investigated the Co/SCBB systems in the CO_(2)methanation with different Co loadings starting from 0.1 to 0.8 mmol_(Co-salt)/g_(SCB).In addition,the effect of Ce was studied,proving that Ce addition improved the catalytic activity significantly,as the catalyst 0.5Co-0.25Ce/SCBB showed the foremost conversion of CO_(2)(60%at 500℃)and the best selectivity of methane(80%at 430℃).This research lays the foundation for utilizing Ce to enhance the catalytic properties of various transition metals that can not offer high catalytic activity alone in the carbon dioxide methanation.
