Relative permittivity measurements of 1,1,1,2-tetrafluoroethane (HFC 134a), pentafluoroethane (HFC 125), and difluoromethane (HFC 32)

Authors
Abbott, AP Eardley, CA Tooth, R
Citation
Ap. Abbott et al., Relative permittivity measurements of 1,1,1,2-tetrafluoroethane (HFC 134a), pentafluoroethane (HFC 125), and difluoromethane (HFC 32), J CHEM EN D, 44(1), 1999, pp. 112-115
Citations number
9
Categorie Soggetti
Chemistry,"Chemical Engineering
Journal title
JOURNAL OF CHEMICAL AND ENGINEERING DATA
ISSN journal
00219568 → ACNP
Volume
44
Issue
1
Year of publication
1999
Pages
112 - 115
Database
ISI
SICI code
0021-9568(199901/02)44:1<112:RPMO1(>2.0.ZU;2-V
Abstract
The relative permittivity of HFC 134a, HFC 32, and HFC 125 was measured as a function of temperature and pressure, to cover the liquid and gaseous sta tes. The temperature range studied was 303 to 403 K, and the pressure range was 4.0 to 30.0 MPa. The relative permittivity, epsilon, could be fitted t o the reduced density rho(r) using the function (epsilon - 1)/(2 epsilon 1). The dipole moment of HFC 134a in the liquid phase has been calculated.