State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences
University of Chinese Academy of Sciences

本研究采用浸渍法、沉淀法和水热合成法制备了一系列泡沫硅负载CoMn基催化剂，并结合XRD、H2-TPR、N2物理吸附-脱附、TEM和XPS等表征技术考察了制备方法对催化剂在合成气制低碳醇反应中的性能影响。研究表明，催化剂表面存在Co2+(Co2C)、Co0物种，水热合成法制备的催化剂表面Co2C-Co0活性位点存在良好的协同作用有利于醇的生成，较高比例的Co2C也促进了CO的非解离吸附和插入，从而呈现最高的醇选择性。在t=260 ℃，p=5.0 MPa，GHSV=4500 h−1，H2/CO(体积比)=2∶1的反应条件下，该泡沫催化剂可实现CO转化率11.1%，总醇选择性34.7%，C2+OH选择性34.5%的反应性能。

A series of silicon foam supported CoMn catalysts were prepared using impregnation, precipitation, and hydrothermal methods. Combining the characterization techniques such as XRD, H2-TPR, N2 physical adsorption, TEM, and XPS, the effect of different catalyst preparation methods on the catalytic performance in the synthesis of higher alcohols from syngas was investigated. Research has shown that there are Co2+(Co2C) and Co0 species on the surface of the catalyst. The active sites of Co2C-Co0 on the surface of the catalyst prepared by hydrothermal synthesis have a good synergistic effect, which is conducive to the generation of alcohols. A higher proportion of Co2C also promotes the associative adsorption and insertion of CO, resulting in the highest alcohol selectivity. Under the reaction conditions: t=260 ℃, p=5.0 MPa, GHSV=4500 h−1, H2/CO(volume ratio)=2∶1, the catalyst exhibited the best reaction performance to achieve CO conversion of 11.1%, total alcohol selectivity of 34.7%, and C2+OH selectivity of 34.5%.

国家自然科学基金 (22179137)资助

杜鑫, 张明伟, 房克功. 泡沫硅负载钴锰催化剂的制备及其合成气制低碳醇反应性能研究[J]. 燃料化学学报（中英文）, 2024, 52(9): 1224-1234.

DU Xin, ZHANG Mingwei, FANG Kegong. Preparation of silicon foam supported CoMn catalysts and their catalytic performances in higher alcohol synthesis via syngas[J]. Journal of Fuel Chemistry and Technology, 2024, 52(9): 1224-1234.