【作者】 吴泰琉； 王力平； 易洪江； 赵荣； 孙尧俊；

【Author】 Wu Tai-Liu Wang Li-Ping Yi Hong-Jiang Zhao Rong Sun Yao-Jun (Center for Analysis and Measurement,Fudan University,Shanghai,200433)

【机构】 复旦大学分析测试中心；

【摘要】 <正>丝光沸石(mordenite,MOR)和 X 沸石一样都具有十二元环的孔结构。LiX 沸石已经在空气的分离中被用作吸附剂,锂型丝光沸石(LiMOR)中 Li~+离子只能存在于十二元环的主孔道或者八元环孔道中．假如 LiM 沸石中所有的 Li~+离子都处于可接近的位置,那么硅铝比 (Si/Al)为5(丝光沸石的理想组成)的 LiMOR 就具有了和 LiX(Si/Al=1)沸石相同数量更多还原

【Abstract】 Siting and accessibility of Li⁺ cations in dehydrated zeolite LiMOR with different ion-exchange degrees prepared by solid-state reaction of system LiC1/NI-I4MOR are investigated by ⁷Li MAS NMR.It’s observed that Li⁺ cations in all dehydrated zeolite LiMOR are located in three types of cationic sites with a constant ratio:24% site A, 47% site D/B and 29% site E,and approximately 76% of Li⁺ cations are accessible to O₂ molecules.N₂ adsorption capacity of dehydrated zeolite LiMOR corresponds linearly to the contents of Li⁺ cations,which validates that the relative contents of accessible Li⁺ cations are constant in all LiMOR samples.更多还原