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Rh-Mn基催化剂用于合成气制乙醇反应颇具潜力。本文采用柠檬酸乙二醇原位聚合的方法在碳纤维(CF)表面负载Rh-Mn催化剂。采用TPR,XRD,TEM,EDS,CO-TPD,H_2脉冲吸附和XPS技术对焙烧和还原后样品的结构和物化性能进行了表征,并考察了催化剂催化合成气制乙醇的反应性能。结果表明,原位聚合法相比传统浸渍法更利于形成紧密接触的Rh-Mn物种,可有效提高Rh的分散度和抗烧结性,显著改善合成气转化反应中CO加氢活性和乙醇选择性。
Rh-Mn-based catalyst for the synthesis of ethanol quite promising potential. In this paper, in situ polymerization of ethylene glycol citrate was used to support the Rh-Mn catalyst on the surface of carbon fiber (CF). The structure and physicochemical properties of the calcined and reduced samples were characterized by TPR, XRD, TEM, EDS, CO-TPD, H 2 pulse adsorption and XPS. The catalytic performance of the catalysts for the synthesis of ethanol from syngas was also investigated. The results showed that the in-situ polymerization method is more conducive to the formation of close contact Rh-Mn species than the traditional impregnation method, which can effectively improve the Rh dispersion and sinterability, and significantly improve the CO hydrogenation activity and ethanol selectivity in the synthesis gas conversion reaction.