Monitoring Molecular Mass Transfer in Cation-Free Nanoporous Host Crystals of Type AIPO-LTA

被引：45

作者：

Hibbe, Florian ^{[1
]}

Caro, Juergen ^{[2
]}

Chmelik, Christian ^{[1
]}

Huang, Aisheng ^{[2
]}

Kirchner, Tom ^{[1
]}

Ruthven, Douglas ^{[3
]}

Valiullin, Rustem ^{[1
]}

Kaerger, Joerg ^{[1
]}

机构：

[1] Univ Leipzig, Dept Interface Phys, D-04103 Leipzig, Germany

[2] Leibniz Univ Hannover, Inst Phys Chem & Electrochem, D-30167 Hannover, Germany

[3] Univ Maine, Dept Chem Engn, Orono, ME 04469 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2012年 / 134卷 / 18期

关键词：

NMR SELF-DIFFUSION; HIGH-SILICA DDR; INTERFERENCE MICROSCOPY; SMALL HYDROCARBONS; SYNTHETIC ZEOLITE; N-ALKANES; TRANSPORT; CHA; SEPARATION; PROPYLENE;

D O I：

10.1021/ja211492b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：7725 / 7732

页数：8

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