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CoO-MoO_3,NiO-MoO_3,CoO-WO_3,NiO-WO_3/Al_2O_3等催化剂在工业上广泛应用于加氢和脱硫过程,对于这类催化剂的研究大多针对此反应.当这类催化剂添加碱金属盐后对水煤气变换反应有明显的促进作用,而对加氢脱硫则显示出负效果.对于水煤气变换反应,这类催化剂最大的特点是能耐高浓度的硫,并具有低温活性.本工作对不同温度处理的NiO-MoO_3-K_2CO_3/Al_2O_3催化剂进行了XRD,XPS,DRS的研究,试图了解焙烧温度对催化剂结构,活性组分存在状态和分布以及催化活性的影响.
Catalysts such as CoO-MoO 3, NiO-MoO 3, CoO-WO 3, NiO-WO 3 / Al 2 O 3 are widely used in industrial processes for hydrogenation and desulfurization. Most of the studies on this type of catalysts are aimed at this reaction. After the water gas shift reaction has a significant role in promoting, while the hydrodesulfurization shows a negative effect.For the water gas shift reaction, the biggest feature of this type of catalyst is resistant to high concentration of sulfur and has low temperature activity.This work for different temperature XRD, XPS and DRS of NiO-MoO_3-K_2CO_3 / Al_2O_3 catalysts were studied in order to understand the effect of calcination temperature on the structure of catalyst, the existence and distribution of active components and the catalytic activity.