Monitoring Molecular Mass Transfer in Cation-Free Nanoporous Host Crystals of Type AIPO-LTA
Monitoring Molecular Mass Transfer in Cation-Free Nanoporous Host Crystals of Type AIPO-LTA
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DOI：
10.1021/ja211492b
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发表时间：
2012-05-09
影响因子：
15
通讯作者：
Kaerger, Joerg
中科院分区：
文献类型：
--
作者：
Hibbe, Florian;Caro, Juergen;Kaerger, Joerg
利用显微成像技术研究了无阳离子AlPO-LTA分子筛在吸附和脱附过程中晶内客体结构的变化。的测量结果显示，提供直接的证据上的速率的晶内扩散和表面渗透和它们的相互关系。结合PFG NMR和积分IR测量，全面概述了轻质烃在这种重要类型的主体材料中的扩散率。
Micro-imaging is employed to monitor the evolution of intra-crystalline guest profiles during molecular adsorption and desorption in cation-free zeolites AlPO-LTA. The measurements are shown to provide direct evidence on the rate of intra-crystalline diffusion and surface permeation and their inter-relation. Complemented by PFG NMR and integral IR measurements, a comprehensive overview of the diffusivities of light hydrocarbons in this important type of host materials is provided.