Selective Water Sorbents for Multiple Applications. 11. CaCl2 Confined to Expanded Vermiculite Full article
| Journal |
Reaction Kinetics and Catalysis Letters
ISSN: 0133-1736 , E-ISSN: 1588-2837 |
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| Output data | Year: 2000, Volume: 71, Number: 2, Pages: 377-384 Pages count : 8 DOI: 10.1023/A:1010351815698 | ||||||
| Tags | Confined calcium chloride, Sorption, Vermiculite, Water vapor | ||||||
| Authors |
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| Affiliations |
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Funding (3)
| 1 | Russian Foundation for Basic Research | 99-03-32312 |
| 2 | Siberian Branch of the Russian Academy of Sciences | |
| 3 | National Research Council |
Abstract:
This paper presents the water sorption properties of a new selective water sorbent based on expanded vermiculite as a host matrix and calcium chloride as a hygroscopic salt. Sorption isobars, isosters and isotherms at T = 30–150°C and vapor partial pressure 8.2–42.0 mbar clearly show that at low water contents crystalline hydrates with 0.33, 1 and 2 molecules of water per 1 molecule of CaCl2 are formed in the pores. These hydrates are stable over a temperature change of 20–30°C and exhibit kinetically slow transformations. At higher water uptake, the vapor absorption leads to the formation of a CaCl2 aqueous solution inside the pores, which properties are close to those in the bulk. Isosteric sorption heat was found to depend on water sorption and change from 76.3 kJ/mol for solid hydrates to 39.1–46.6 kJ/mol.
Cite:
Aristov Y.I.
, Restuccia G.
, Tokarev M.M.
, Buerger H.-D.
, Freni A.
Selective Water Sorbents for Multiple Applications. 11. CaCl2 Confined to Expanded Vermiculite
Reaction Kinetics and Catalysis Letters. 2000. V.71. N2. P.377-384. DOI: 10.1023/A:1010351815698 WOS Scopus РИНЦ ANCAN OpenAlex
Selective Water Sorbents for Multiple Applications. 11. CaCl2 Confined to Expanded Vermiculite
Reaction Kinetics and Catalysis Letters. 2000. V.71. N2. P.377-384. DOI: 10.1023/A:1010351815698 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Published print: | Nov 1, 2000 |
| Submitted: | Nov 8, 2000 |
| Accepted: | Nov 27, 2000 |
Identifiers:
| Web of science: | WOS:000167137100025 |
| Scopus: | 2-s2.0-0347999378 |
| Elibrary: | 13346340 |
| Chemical Abstracts: | 2001:159947 |
| Chemical Abstracts (print): | 134:301190 |
| OpenAlex: | W5039552 |