期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 5, 期 12, 页码 11780-11787出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b03528
关键词
BET modeling; Deep eutectic solvents; Phase diagrams; Salt hydrates
Neoteric solvents for sustainable chemical processes are continuously sought nowadays. Deep eutectic solvents (DES), i.e., liquids that are mixtures of two components that have freezing points considerably below the melting points of these components, constitute a possible solution for this search. Mixtures of certain congruently melting salt hydrates with water have freezing points considerably below the melting points of ice and of the salt hydrate. They should be considered as DES for applications in which their properties could be useful, namely their being green and nonflammable ionic liquids at very low temperatures. The eutectic points and eutectic temperature distances of such salt hydrate DES, calculated from literature data, are tabulated, and some illustrative phase diagrams are shown. Physical properties of the aqueous salt hydrate DES that are relevant to their possible applications are reported, and they compare favorably with those of conventional DES. The Brunauer-Emmett-Teller modeling procedure is applied to the case of the aqueous potassium fluoride tetrahydrate phase diagram.
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