Diffusion of propene in DDR crystals studied by interference microscopy
Diffusion of propene in DDR crystals studied by interference microscopy
复制标题
通过干涉显微镜研究丙烯在 DDR 晶体中的扩散
DOI:
10.1016/j.ces.2015.07.029
复制
发表时间:
2015
影响因子:
4.7
通讯作者:
D.M. Ruthven
中科院分区:
文献类型:
--
作者:
A. Lauerer;T. Binder;J. Haase;J. Kärger;D.M. Ruthven
This paper presents the results of a detailed experimental study of the diffusion of propene in large crystals of DDR zeolite (the pure silica analog of ZSM-58) carried out by interference microscopy (IFM). Diffusion is very slow as the propene molecules are only just small enough to pass through the distorted 8-ring windows of the DDR structure. This makes it possible to measure many concentration profiles during the available time and thus to study the diffusional behavior at a level of detail that would be impossible in faster systems. In an ideal DDR crystal diffusion should occur only in the radial direction. In the actual system radial diffusion was dominant but there is also a small but significant axial component which complicates the interpretation of the experimental data. The diffusivity increases strongly with loading but the apparent magnitude of this effect may be increased by the small contribution from axial diffusion. The activation energy for radial diffusion is about 34 kJ/mole.
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影响因子:
4.4
作者:
Tomas Binder;Florian Hibbe;C. Chmelik;J. Kärger;A. Martinez;J. Gascón;F. Kapteijn;D. Ruthven
通讯作者:
D. Ruthven
影响因子:
16.6
作者:
Lauerer A;Binder T;Chmelik C;Miersemann E;Haase J;Ruthven DM;Kärger J
通讯作者:
Kärger J
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Tomas Binder
通讯作者:
Tomas Binder
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
E. Lehmann;S. Vasenkov;J. Kärger;Gabriela Zadrożna;J. Kornatowski;Ö. Weiss;F. Schüth
通讯作者:
F. Schüth
影响因子:
15
作者:
Hibbe, Florian;Caro, Juergen;Kaerger, Joerg
通讯作者:
Kaerger, Joerg