A Compact Layer of Alumina Modified by CaCl2: The Influence of Composition and Porous Structure on Water Transport Full article
| Journal |
Microporous and Mesoporous Materials
ISSN: 1387-1811 , E-ISSN: 1873-3093 |
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| Output data | Year: 2010, Volume: 131, Number: 1-3, Pages: 358-365 Pages count : 8 DOI: 10.1016/j.micromeso.2010.01.014 | ||||
| Tags | Confined salt, Inter- and intragrain diffusion resistance, Porous layer, Single point NMR imaging technique, Water adsorption | ||||
| Authors |
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| Affiliations |
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Funding (3)
| 1 | Russian Foundation for Basic Research | 08-03-00661 |
| 2 | Russian Foundation for Basic Research | 08-08-00808 |
| 3 | Russian Foundation for Basic Research | 08-08-90016 |
Abstract:
This paper reports a target-oriented synthesis of the compact layer of alumina and its modification by a calcium chloride. The layer preparation procedure with the use of binder has been developed which makes it possible to widely vary the layer porous structure. The effect of the layer structure and composition on water vapor transport in it has been studied by NMR imaging. The effects of the size of the primary alumina grains, the amounts of the binder and the guest salt on the porous structure of the layer and the mechanism of vapor transport in the layer have been investigated. Variation of these parameters has been shown to alter the relative contributions of the diffusional resistances in the intergrain macropores and in the intragrain mesopores and to permit an intentional transition between the different diffusional regimes of water sorption. If the sorption rate is limited by the diffusion of water in the intergrain voids, an adsorption front is formed in the sample and is propagating into the layer. The penetration depth depends on time as t0.5. If the water sorption in the primary grains is the slowest process, the water uptake uniformly increases over the entire layer.
Cite:
Glaznev I.S.
, Koptyug I.V.
, Aristov Y.I.
A Compact Layer of Alumina Modified by CaCl2: The Influence of Composition and Porous Structure on Water Transport
Microporous and Mesoporous Materials. 2010. V.131. N1-3. P.358-365. DOI: 10.1016/j.micromeso.2010.01.014 WOS Scopus РИНЦ ANCAN OpenAlex
A Compact Layer of Alumina Modified by CaCl2: The Influence of Composition and Porous Structure on Water Transport
Microporous and Mesoporous Materials. 2010. V.131. N1-3. P.358-365. DOI: 10.1016/j.micromeso.2010.01.014 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Nov 19, 2009 |
| Accepted: | Jan 19, 2010 |
| Published online: | Jan 25, 2010 |
| Published print: | Jun 1, 2010 |
Identifiers:
| Web of science: | WOS:000276627600047 |
| Scopus: | 2-s2.0-77649231915 |
| Elibrary: | 15331780 |
| Chemical Abstracts: | 2010:301351 |
| Chemical Abstracts (print): | 153:368831 |
| OpenAlex: | W2056173080 |