Critical parameters and vapor pressure measurements for 1,1,1-trifluoroethane (R-143a)

被引：22

作者：

Fujiwara, K ^{[1
]}

Nakamura, S ^{[1
]}

Noguchi, M ^{[1
]}

机构：

[1] Daikin Ind Ltd, Div Chem, Osaka 566, Japan

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 1998年 / 43卷 / 01期

关键词：

D O I：

10.1021/je970177h

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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(-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(-3), and +/-6 mK, respectively.

引用

页码：55 / 59

页数：5

共 23 条

[1] Vapor-liquid coexistence curves in the critical region and the critical temperatures and densities of 1,1,1,2-tetrafluoroethane (R-134a), 1,1,1-trifluoroethane (R-143a), and 1,1,1,2,3,3-hexafluoropropane (R-236ea) [J].