CeO_2对Cu-ZnO催化剂性质和CO_2加氢反应性能的影响

Effect of CeO_2 on property of Cu-ZnO catalyst and its performance in CO_2 hydrogenation

运用活性评价、XRD、TPR、CO2 - TPD和积炭测定手段 ,探讨了 Ce O2 对 Cu- Zn O催化剂性质和 CO2 加氢反应性能的影响。结果表明 ,催化剂经 Ce O2 改性后 ,Cu O晶粒明显长大 ,致使催化剂还原难度增加 ;有利于 CO歧化反应进行 ,使催化剂上积炭量增加 ;CO2 吸附量减少 ,CO2

The effect of CeO 2 on property of Cu ZnO and its performance in CO 2 hydrogenation was investigated by means of activity test, XRD,TPR,CO 2 TPD and carbon deposit determination. Results showed that after the catalyst was modified by CeO 2,CuO crystals become apparently larger, which makes reduction of the catalyst more difficult; this is favorable to CO disproportion, and increases carbon deposition; it also decrease adsorption amount of CO 2 and enhance the activity for CO 2 hydrogenation to methanol.