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研究以球形雾化镍粉为原料通过放电等离子烧结(SPS)制备多孔镍块体催化材料的新工艺,用SEM、氮吸附和XRD分析制备的多孔镍块材的微观结构和相组成,并进一步研究多孔镍材对甲烷部分氧化法(POM)制取合成气反应的高流速催化性能。结果表明,采用SPS工艺可制备出孔隙率大于70%的纯净多孔镍材,850℃保温120s制备的镍材可应用于流速达2.70L/min的POM反应,经其催化的CH4转化率高于80%。
A new technology of preparing porous nickel block catalytic material by using spherical atomized nickel powder as raw material by spark plasma sintering (SPS) was studied. The microstructure and phase composition of porous nickel block were analyzed by SEM, nitrogen adsorption and XRD. The high-velocity catalytic performance of porous nickel material for the synthesis of syngas from methane partial oxidation (POM) was studied. The results show that pure porous nickel with porosity greater than 70% can be prepared by SPS process. The nickel material prepared by heating at 850 ℃ for 120s can be applied to the POM reaction with the flow rate of 2.70L / min. The catalytic conversion of CH4 is higher than 80%.