Y_2O_3对CuO-ZnO-ZrO_2催化剂结构及性能的影响

Influence of Y_2O_3 Promoter on Structure and Catalytic Performance of CuO-ZnO-ZrO_2 Catalyst

考察了Y2O3对CuO-ZnO-ZrO2催化剂性能的影响,以甲醇水蒸汽重整为探针反应,并利用XRD、TPR、BET、H2-TPD、CO-TPD和IR等手段对催化剂的结构及性能进行了表征。结果表明,Y2O3的加入提高了催化剂中CuO的分散度、H2吸附量、Cu+的含量及Cu+/Cux0比,加强了CuO和ZnO之间的相互作用,抑制了Cu+的深度还原,使CuO-ZnO-ZrO2催化剂的甲醇水蒸汽重整制氢反应的活性增大。

Performances of Cue-ZnO-ZrOz catalyst using Y2O3modification for steam reforming of methanol reaction were investigated ,the structure and catalytic properties of the catalysts were charactered by XRD,TPR, BET,H2-TPD,CO-TPD and IR techniques. The i＇esults indicated that the addition of Y2O3 in Cue-ZnO-ZrO2 catalyst improved the dispersition of CuO,H2 adsorption amount, strengthened the interaction between Cue and ZnO, increased the content of Cu^＋ and the ratio of Cu^＋/Cux^0,prevented Cu^＋ from deep reducing ,and therefore the CuO-ZnO-ZrOx catalyst activity was improved for steam reforming of methanol reaction.