采用分步沉淀法制备了不同Cu/Ni摩尔比的CuFeNi/ZnO催化剂，并采用X射线衍射、N₂物理吸附等手段对催化剂的结构进行表征。考察了其催化CO加氢合成低碳混合醇的反应性能，同时探究了反应温度及反应压力对催化剂催化性能的影响。结果表明，少量Ni助剂的加入可以增加催化剂比表面积，提高CuO的分散度，促进碳链增长，提高液相产物中C₂⁺醇的选择性。当Cu/Ni摩尔比为7∶1时，催化剂的比表面积达到最大（85.09 m²/g），醇的选择性较高，C₂⁺醇与甲醇的质量比最大为0.67，C₂⁺醇在液相产物中的质量分数最高。在空速为5 000 h^-1、V（H₂）/V（CO）=2时以Cu₇FeNi_1.0/ZnO催化剂合成低碳醇中，当反应温度为340℃、反应压力为6 MPa时，更有利于C₂⁺醇生成，尤其是异丙醇的选择性较高。

A series of CuFeCrNi/ZnO catalysts with different Cu/Ni molar ratios (7/0.5,7/1.0,7/1.5,7/2.0) are prepared by stepwise precipitation method and their structures are characterized by nitrogen adsorption and XRD,etc.The catalytic performances of CuFeCrNi/ZnO catalysts in CO hydrogenation to make low-carbon alcohols are evaluated and the effects of reaction temperature and pressure on the catalytic properties of the catalysts are investigated by means of a continuous flow fixed bed micro-reactor.The results indicate that the addition of small amount of Ni auxiliary can help catalysts to expand BET surface area,facilitate the dispersion degree of oxide copper,promote the growth of carbon chain and increase the selectivity of C₂₊OH.Under a Cu/Ni ratio of 7/1.0,the prepared catalyst exhibits the highest BET surface area (85.09 m²·g^-1),a higher selectivity of alcohols,the highest mass ratio of C₂₊OH to MeOH (0.67) and the maximum content of C₂₊OH in the liquid products.The conditions that are beneficial to the formation of C₂₊OH,especially propanol,in the synthesis of low-carbon alcohols over Cu₇FeNi_1.0/ZnO catalyst are as follows:reaction temperature is at 340℃,reaction pressure is 6 MPa,GHSV=5 000 h^-1 and V(H₂)/V(CO)=2.

段玉梅(1993-),女,硕士研究生,主要从事合成气制低碳醇催化剂研究,649008808@qq.com。