采用共沉淀法制备CuCoMnAl多组分金属催化剂，并在固定床反应器中考察该催化剂对合成气制C₂₊醇反应的性能。实验结果表明，当n（Co）∶n（Cu）=0.4时，生成C₂₊醇的选择性达到18.7%，其中乙醇所占比例>50%，添加Co的催化剂改性效果显著。利用XRD、H₂-TPR、BET和CO-TPD等分析方法对催化剂进行表征，考察催化剂的结构和表面性质对生成C₂₊醇选择性的影响。结果表明，适量添加Co可使催化剂形成双级孔结构，生成了具有协同作用的Cu-Co结构，显著增加催化剂吸附CO的能力，促进合成C₂₊醇活性位的形成。

A series of CuCoMnAl multi-component catalysts are prepared by co-precipitation method.Synthesis of higher alcohols is performed in a fixed bed reactor to evaluate the performance of the prepared catalysts.The results indicate that at a Co/Cu ratio of 0.4,the selectivity of C₂₊ alcohols can reach 18.7% and the proportion of ethanol exceeds 50%.The catalysts are characterized by XRD,H₂-TPR,CO-TPD and BET techniques to investigate the effect of catalysts structure and surface properties on the selectivity of C₂₊ alcohols.It is shown that the proper addition amount of Co can make the catalysts form bimodal porous structure.Cu-Co structure with synergistic effect can significantly enhance catalysts' adsorption capacity to CO and promote the formation of the active sites for C₂₊ alcohols.

高利红(1992-),女,硕士研究生,研究方向为合成气制乙醇,807296199@qq.com