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考察了K-Fe/ZSM-48催化剂在CO加氢合成低碳烯烃反应中的催化性能。结果表明,该催化剂有较高的活性和低碳烯烃(C_2~=-C_4~=)选择性。TPR,TPD,XPS和化学吸附测试表明,催化剂有良好的催化性能的原因,在于负载活性组分有较好的还原度和适宜的相分布。钾的加入促进了Fe(Ⅲ)→Fe_3O_4的还原,阶低了H_2/C0的不可逆吸附,使催化剂的活性和选择性得到提高。
The catalytic performance of K-Fe / ZSM-48 catalyst for the reaction of CO to olefins to olefins was investigated. The results show that the catalyst has high activity and selectivity to light olefins (C 2 -C 4 -C 4). TPR, TPD, XPS and chemisorption tests show that the catalyst has a good catalytic performance because of the active component has a good degree of reduction and the appropriate phase distribution. The addition of potassium promoted the reduction of Fe (Ⅲ) → Fe_3O_4, and lowered the irreversible adsorption of H_2 / C_0, which improved the activity and selectivity of the catalyst.