【摘 要】
：
The Al2O3-CeO2 composite supported Ni catalyst was developed for synthetic natural gas(SNG)from bio-syngas methanation.The physic-chemical properties of the catalysts were characterized by nitrogen ph
【机 构】
：
Key Laboratory of Renewable Energy,Guangzhou Institute of Energy Conversion,Chinese Academy of Scien
【出 处】
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The 4th International Conference on Biomass Energy Technolog
论文部分内容阅读
The Al2O3-CeO2 composite supported Ni catalyst was developed for synthetic natural gas(SNG)from bio-syngas methanation.The physic-chemical properties of the catalysts were characterized by nitrogen physisorption,H2-TPR,XRD,SEM and TG.The methanation tests showed that Ni/Al2O3-CeO2 presented the highest methanation performances at low temperature(91.6%CO conversion with 92%CH4 selectivity at 350 oC)compared with Ni/Al2O3,Ni/ZrO2 and Ni/Al2O3-SiO2,etc.The characterization results indicated that incorporation of CeO2 in Al2O3 facilitated the immigration of Ni species to surface layers,remaining simultaneously high BET surface area and well dispersion of NiO on the surface of composite support.Combination of CeO2 and Al2O3 weakened the interaction of NiO-Al2O3 and restrained the formation of less reducible NiAl2O4,promoting the reduction of NiO species.All of these improved the catalytic activity for syngas methanation to SNG and the resistance to carbon deposition for Ni/Al2O3-CeO2.
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