金属络合物制备分子筛负载金属催化剂的CO加氢反应性能

应用Ｙ分子筛吸附Ｆｅ（ＣＯ）５、Ｃｏ（ＣＯ）３ＮＯ和Ｍｏ（ＣＯ）６的温和热分解制备分子筛负载金属催化剂，从分子筛交换阳离子和吸附金属络合物之间的相互作用说明其ＣＯ加氢产物的分布特点。实验结果表明，分子筛内阳离子和吸附金属络合物间的相互作用显著影响制得催化剂的结构和反应的产物分布。由于金属络合物和分子筛内阳离子间的电子转移，使ＮｉＹ附载金属催化剂显示出高的ＣＯ转化率和甲烷选择性。在ＣｕＹ中，这种电子

PERFORMANCE OF METAL COMPLEX LOADED ZEOLITES TESTED BY CO HYDROGENATION

The methods of adsorption and subsequent thermal decomposition of Fe(CO) 5,Co(CO) 3NO and Mo(CO) 6 on the Yzeolites containing different types of cations (Na +, Cu 2+ , Ni 2+ , Co 2+ and Ca 2+ ) were used to prepare metalloaded zeolite catalysts The performance of the catalysts was tested by CO hydrogenation reaction It was found that the interaction of the cations in the zeolites with the adsorbed metal complexes significantly influenced the structures of the catalysts and thus the product distribution of CO hydrogenation Due to the occurrence of the electron tranfer between metal complexes and the zeolite cations, the NiY loaded metal catalysts exhibited a high conversion of CO and selectivity to methan While for CuY, such electron transfer resulted in a low activity of CO hydrogenation because of the oxidation of the active metallic components In the case of the CaY loaded metal catalysts, the decomposed metal components could be anchored inside zeolite cages, which gave rise to a product distribution of CO hydrogenation significantly deviating from the typical ShulzFlory distribution