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研究新型的由多壁碳纳米管(MWNTs)负载的,ZnO助催的铑基甲醇合成催化剂.当铑含量达到4%(w)时,催化剂具有较高的比表面积(99.6m2·g-1),催化剂的反应活化能为68.8kJ·mol-1.在563K,1MPa下,催化剂的最高催化活性和甲醇选择性分别为411.4mg/gcat.·h和96.7%.TEM、TPR和TPD等表征结果显示,碳纳米管能增加Rh在催化剂表面的分散度,提高催化剂的还原温度并能增加氢物种的吸附量,这些结果将有助于更好地了解催化剂中各组分间的协同作用和催化活性中心本质.
A novel ZnO-promoted rhodium-based methanol supported catalyst supported by multi-walled carbon nanotubes (MWNTs) was investigated.The catalyst had a high specific surface area (99.6m2 · g-1) when rhodium content reached 4% ), The activation energy of the catalyst was 68.8kJ · mol-1.The highest catalytic activity and methanol selectivity of the catalyst were 411.4mg / gcat · h and 96.7% respectively at 563K and 1MPa.The characterization of TEM, TPR and TPD The results show that carbon nanotubes can increase the dispersion of Rh on the catalyst surface, increase the reduction temperature of the catalyst and increase the adsorption capacity of the hydrogen species. These results will help to better understand the synergistic effect between the various components in the catalyst and The nature of catalytic activity.