Abstract: 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 Cu7FeNi1.0/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, 郑长征, 李亚斐, 丁羽佳, 张兴. Ni改性Cu-Fe基催化剂的制备及其在CO加氢制低碳醇中的性能研究[J]. 现代化工, 2018, 38(8): 139-142,144.
DUAN Yu-mei, ZHENG Chang-zheng, LI Ya-fei, DING Yu-jia, ZHANG Xing. Synthesis of Ni modified Cu-Fe based catalyst and its catalytic performance in production of low-carbon alcohols through CO hydrogenation. Modern Chemical Industry, 2018, 38(8): 139-142,144.
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