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比较了溶胶-凝胶法和共沉淀法引入钾或锰助剂对Fe催化剂的CO加氢反应性能的影响,结果显示,制备方法的改变基本没有影响钾助剂在提高催化剂低碳烯烃选择性方面的性能,锰助剂的作用则因制备方法的不同而异,与共沉淀法相比,溶胶-凝胶法引入的锰助剂不能有效改善催化剂的低碳烯烃选择性;进一步的H2 TPR对比研究表明:以溶胶-凝胶法引入的锰助剂不能有效改善催化剂的初始还原性能,从而导致其无法提高催化剂的低碳烯烃选择性。
The effects of the addition of potassium or manganese promoter on the CO hydrogenation performance of Fe catalyst were compared by sol-gel method and coprecipitation method. The results showed that the change of preparation method did not affect the selectivity of potassium promoter The performance of manganese additive is different from the preparation method. Compared with the coprecipitation method, the manganese additive introduced by the sol-gel method can not effectively improve the selectivity of the catalyst for the light olefins. Further comparative study of H2 TPR The results show that the manganese additive introduced by sol-gel method can not effectively improve the initial reduction performance of the catalyst, which can not improve the selectivity of the light olefin of the catalyst.