Solvent properties of liquid and supercritical hydrofluorocarbons

Journal Article · Thu Apr 01 04:00:00 EST 1999 · Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical

DOI:https://doi.org/10.1021/jp9835317· OSTI ID:345117

Abbott, A P; Eardley, C A ^[1]

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1. Leicester Univ. (United Kingdom). Chemistry Dept.

The dipolarity/polarizability parameter {pi}{sup *}, introduced by Kamlet and Taft, was measured for difluoromethane (HFC 32) and pentafluoroethane (HFC 125) and compared with those previously reported for 1,1,1,2-tetrafluoroethane (HFC 134a). This was carried out as a function of temperature and pressure, to cover the liquid and supercritical states over the range 30--130 C and 40--300 bar. The change in dipolarity/polarizability with the reduced density is explained in terms of local density augmentation and a van der Waals model is used to predict the changes in solvent properties. The mean sphere approximation (MSA) model was applied to the data and found to produce an excellent fit for all of the solvents in both the liquid and supercritical states.

• OSTI ID: 345117
• Journal Information: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Journal Name: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Journal Issue: 13 Vol. 103; ISSN 1089-5647; ISSN JPCBFK
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
FLUORINE COMPOUNDS
HYDROCARBONS
MATHEMATICAL MODELS
PRESSURE DEPENDENCE
SOLVENT PROPERTIES
SUPERCRITICAL GAS EXTRACTION
SUPERCRITICAL STATE
TEMPERATURE DEPENDENCE