Isotope Effect on Eutectic and Hydrate Melting Temperatures in the Water-THF System

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Differential scanning calorimetry was used to study the effect of isotopic substitution on the eutectic and melting temperatures in the water-tetrahydrofuran (THF) system with THF molar fractions near the stoichiometry of the hydrate phase. Deuteration of the host causes an opposite effect from that of the guest with respect to the hydrate liquidus curve and eutectic melting temperature. The eutectic temperature in -containing systems is approximately 3.7 K higher than that in -containing systems. The melting temperatures of THF and deuterated THF hydrates increase by roughly 3.5 K with heavy water. The inclusion of deuterated THF causes a depression of the hydrate liquidus temperatures and a small but measurable effect on the eutectic temperature.
Publisher
Hindawi Publishing Corporation
Issue Date
2010
Language
English
Citation

Journal of Thermodynamics, pp.583041 - 583041

ISSN
1687-9244
DOI
10.1155/2010/583041
URI
http://hdl.handle.net/10203/194215
Appears in Collection
CBE-Journal Papers(저널논문)
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