Micro-imaging of transient guest profiles in nanoporous host systems of cylindrical symmetry

被引：10

作者：

Binder, Tomas ^{[1
]}

Hibbe, Florian ^{[1
]}

Chmelik, Christian ^{[1
]}

Kaerger, Joerg ^{[1
]}

Martinez-Joaristi, Alberto ^{[2
]}

Gascon, Jorge ^{[2
]}

Kapteijn, Freek ^{[2
]}

Ruthven, Douglas ^{[3
]}

机构：

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

[2] Delft Univ Technol, NL-2628 BL Delft, Netherlands

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

来源：

JOURNAL OF CHEMICAL PHYSICS | 2012年 / 137卷 / 16期

关键词：

MFI-TYPE ZEOLITES; DIFFUSION; DD3R; SEPARATION; EXISTENCE; METHANOL;

D O I：

10.1063/1.4762849

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanoporous host materials giving rise to transient guest profiles of cylindrical symmetry during molecular uptake and release are shown to provide particularly advantageous conditions for the study of guest diffusion by micro-imaging. Considering zeolites of structure type DDR (Deca-dodecasil 3R) as a host system and short-chain length hydrocarbons as guest molecules, the benefits thus attainable in micro-imaging studies using interference microscopy are shown to include the determination of transient concentration profiles with improved accuracy, the option to overcome the disturbing impact of surface imperfections, and easy access to concentration-dependent diffusivities. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4762849]

引用

页数：8

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