Critical parameters and vapor pressure measurements for 1,1,1-trifluoroethane (R-143a)
- Daikin Industries, Ltd., Settsu, Osaka (Japan). Chemical Div.
An apparatus to measure the critical pressure, density, and temperature by visual observation of the meniscus in an optical cell is presented. The critical parameters and vapor pressures for 1,1,1,2-tetrafluoroethane (R-134a) were measured to confirm the reliability of the measurements with the present apparatus. The critical pressure, density, and temperature of 1,1,1-trifluoroethane (R-143a) were determined to be 3.7639 MPa, 434 kg/m{sup 3}, and 345.861 K, respectively. Thirteen vapor pressures of R-143a were obtained at temperatures from 263 K to the critical temperature. The uncertainties of pressure, density, and temperature measurements are estimated to be within {+-} 2.6 kPa, {+-} 2 kg/m{sup 3}, and {+-} 6 mK, respectively.
- OSTI ID:
- 599802
- Journal Information:
- Journal of Chemical and Engineering Data, Journal Name: Journal of Chemical and Engineering Data Journal Issue: 1 Vol. 43; ISSN 0021-9568; ISSN JCEAAX
- Country of Publication:
- United States
- Language:
- English
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