摘要
本文采用ＸＰＳ、ＴＰＤ、ＥＳＲ和催化反应等手段考察了微量Ｌａ对溶剂化金属原子浸渍法制备的高分散Ｋ－Ｆｅ／硅沸石催化剂的作用。结果表明：在Ｋ－Ｆｅ硅沸石中适量Ｌａ的引入，不仅提高了催化剂在ＣＯ＋Ｈ＿２反应中的活性和对低碳烯烃的选择性，而且大大改善了催化剂的稳定性。同时由于微量Ｌａ的存在，改变了金属载体间的相互作用、催化剂对Ｈ＿２和ＣＯ的吸附性能及催化剂在反应过程的磁性能。
The characteristics of SMAI La-K-Fe/Silicalite catalysts with various Lacontents for CO hydrogenation were investigated. Appropriate La in La-K-Fe/Silicalite notonly enhanced the activity and selectivity of syngas conversion toward low olefins but help toremain the stability of the catalyst. The addition of La changed the adsorption capacity of catalyst for H_2 and CO and the magnetic properties of La -K-Fe/Silicalite catalyst in the process ofreaction compared witn the K-Fe/Silicalite.
