Kinetics of Water Sorption on SWS-1L (Calcium Chloride Confined to Mesoporous Silica Gel): Influence of Grain Size and Temperature Full article
Journal |
Chemical Engineering Science
ISSN: 0009-2509 , E-ISSN: 1873-4405 |
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Output data | Year: 2006, Volume: 61, Number: 5, Pages: 1453-1458 Pages count : 6 DOI: 10.1016/j.ces.2005.08.033 | ||||
Tags | Adsorption, Calcium chloride, Diffusion, Kinetics, Porous media, Silica gel | ||||
Authors |
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Affiliations |
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Funding (5)
1 | Russian Foundation for Basic Research | 05-02-16953 |
2 | Siberian Branch of the Russian Academy of Sciences | 166 |
3 | Russian Foundation for Basic Research | 04-02-81028 |
4 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 03-51-6260 |
5 | Russian Foundation for Basic Research | 03-02-39017 |
Abstract:
Kinetics of water sorption on loose grains of composite sorbent CaCl2 confined to mesoporous silica (SWS-1L) was measured at View the MathML source and View the MathML source over water uptake range 0–0.47 g/g for various particle sizes Rp (between 0.355 and 1.4 mm). The measurements were performed in a constant pressure unit based on a CAHN microbalance under isothermal external conditions.
The results obtained evidence an enhancement of the sorption rate and apparent diffusion constant with the decrease in the particle size (approximately as View the MathML source at View the MathML source). Contribution of thermal effects was found for water sorption on smaller SWS particles (0.355–0.425 mm), which decreases the sorption rate.
The apparent water diffusivity was found to depend on the local slope of the SWS water sorption isotherm. The pore diffusivity of water in the temperature range 33–69 °C was calculated from experimental data View the MathML source that is approximately 10 times lower than the Knudsen pore diffusivity estimated for pores of silica KSK. The possible reasons of the diffusivity reduction are discussed.
Cite:
Aristov Y.I.
, Glaznev I.S.
, Freni A.
, Restuccia G.
Kinetics of Water Sorption on SWS-1L (Calcium Chloride Confined to Mesoporous Silica Gel): Influence of Grain Size and Temperature
Chemical Engineering Science. 2006. V.61. N5. P.1453-1458. DOI: 10.1016/j.ces.2005.08.033 WOS Scopus РИНЦ
Kinetics of Water Sorption on SWS-1L (Calcium Chloride Confined to Mesoporous Silica Gel): Influence of Grain Size and Temperature
Chemical Engineering Science. 2006. V.61. N5. P.1453-1458. DOI: 10.1016/j.ces.2005.08.033 WOS Scopus РИНЦ
Dates:
Submitted: | Jan 28, 2005 |
Accepted: | Aug 23, 2005 |
Published online: | Oct 20, 2005 |
Published print: | Mar 1, 2006 |
Identifiers:
Web of science | WOS:000235324600011 |
Scopus | 2-s2.0-30344442160 |
Elibrary | 13505718 |
Chemical Abstracts | 2006:38357 |
Chemical Abstracts (print) | 144:300153 |
OpenAlex | W2058481833 |