放电等离子烧结制备多孔镍催化材料

Preparation of Porous Nickel Bulk Catalyst by Spark Plasma Sintering Process

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%。

Preparation of porous Ni bulk catalyst by spark plasma sintering (SPS) with spherical atomized Ni powder as the starting material was studied. The microstructure and phases of the prepared porous Ni bulks were characterized by SEM, the nitrogen adsorption test and XRD. In addition, the catalysis properties of the porous Ni bulk in the Partial Oxidation of Methane (POM) process with high flow rates were investigated. The results show that the clean porous Ni bulk catalyst with porosity larger than 70% can be prepared by the SPS process. The catalyst prepared at 850 degrees C and held for 120 s can be applied in the POM process with a flow rate up to 2.70 L/min. The conversion ratio of CH(4) in the catalyzed POM process with the catalyst is higher than 80%.