Ce助剂对Cu-ZnO-Al2O3/HZSM-5在CO2加氢合成二甲醚中的性能影响

采用凝胶网格共沉淀法制备二甲醚的催化剂CuO-ZnO-Al₂O₃/HZSM-5，考察不同助剂La、Ce、Co、Zr对其性能的影响。结果表明，加入助剂后，CO₂转化率和二甲醚的选择性都有不同程度的提高，进行比较后发现尤其是加入Ce助剂后，二甲醚的选择性达到61.5%，CO₂的转化率达到40%。利用BET、XRD、SEM、H₂-TPR、H₂-TPD等表征方法对其物化性质进行表征。

Effect of Ce loading in CuO-ZnO-Al2O3/HZSM-5 on catalytic performance of dimethyl ether synthesis from carbon dioxide

CuO-ZnO-Al₂O₃ was prepared by gel-network co-precipitation for synthesizing dimethyl ether from carbon dioxide by hydrogenation and the effects of La，Ce，Co and Zr promoters on catalyst performance were investigated. The results showed that after adding a small amount of Ce，the selectivity of dimethyl ether reached 61.5% and the conversion rate of CO₂ reached 40%.The physical-chemical propertise and catalytic performance of the catalysts were characterization by using BET，XRD，SEM，TPR and H₂-TPD techniques.