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采用并流共沉淀法制备了CuCoFe 合成醇催化剂,通过改变有机添加物,对CuCoFe 催化剂前驱物的结构和表面状态进行修饰和改性,考察了不同有机添加物对催化剂结构的影响规律. 不同添加物可以修饰调节催化剂的晶粒大小、比表面积和孔径分布. 加入草酸或丙烯酰胺,可使CuO(111) 和Co3O4(110) 晶粒度增大,比表面积减小,孔径较大的过渡孔分数增大. 柠檬酸为添加物时,催化剂中CuO 和Co3O4 晶粒度较小,比表面积较大,孔径主要分布在小于10 nm 的细孔区.
Cu-Co-Fe catalyst was prepared by cocurrent coprecipitation method. The structure and surface state of CuCoFe catalyst precursors were modified and modified by changing organic additives. The effects of different organic additives The influence of catalyst structure. Different additives can be modified to adjust the catalyst grain size, specific surface area and pore size distribution. Addition of oxalic acid or acrylamide can increase the grain size of CuO (111) and Co3O4 (110), decrease the specific surface area and increase the transition pore fraction with larger pore diameter. When citric acid is additive, the crystallites of CuO and Co3O4 are smaller in grain size and larger in specific surface area, and the pore size is mainly distributed in the pore area less than 10 nm.