【作者】 刘勇； 张维萍； 李秀杰； 谢素娟； 刘宪春； 徐龙伢； 韩秀文； 包信和；

【Author】 LIU Yong ZHANG Weiping LI Xiujie XIE Sujuan LIU Xianchun XU Longya HAN Xiuwen BAO Xinhe State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,457 Zhongshan Road,Dalian 116023,China

【机构】 中国科学院大连化学物理研究所催化基础国家重点实验室；

【摘要】 <正>分子筛的两相共生是一种比较常见的现象,一般两相具有相似的结构单元,如 MCM-22 和 ZSM-35,它们都具有十元环的孔道结构,可分别在相同反应体系中得到各自的纯相,以前人们仅把诸如 ZSM-5/ZSM-11、BEA/MOR、MCM-22/ZSM-35等共生分子筛当作混晶而忽视了对其结构和性质的研究。虽然它们的物理性质与机械混合物非常类似,在XRD、N₂吸附性更多还原

【Abstract】 The intergrowth of two or more kinds of zeolites is a quite common phenomenon.The intergrowth zeolites normally have the similar structure.For example,both of MCM-22 and ZSM-35 have the same structure of 10-membered ring.They can be obtained respectively in the same synthesis conditions.The intergrowth zeolites like ZSM-5/ZSM-11,BEA/MOR, MCM-22/ZSM-35 etc.are considered as the crystal mixtures and their structures and performances are not well established in the literature.The XRD and N₂ adsorption studies of MCM-22 and ZSM-35 show no differences between the intergrowth zeolites and mechanic mixture,but their catalytic performances are quite different.Hyperpolarized ¹²⁹Xe NMR can increase the sensitivity greatly compared to the thermally polarized one.It is a powerful tool to detect the porosity of materials and the distribution of the particles inside.We have established such a system under continuous follow of hyperpolarized Xe and employed it to characterize the porous structure of nanocomposites.In this presentation,the porosity and framework structure of MCM-22/ZSM-35 intergrowth zeolite are studied by HP ¹²⁹Xe and ²⁷Al 3Q MAS NMR,respectively.更多还原