New Fundamental Equations of State for cis-1,3,3,3-Tetrafluoropropene [R-1234ze(Z)] and 3,3,3-Trifluoropropene (R-1243zf)

Published

April 18, 2019

Author(s)

Ryo Akasaka, Eric Lemmon

Abstract

New fundamental equations of state are presented for cis-1,3,3,3-tetrafluoropropene [R- 1234ze(Z)] and 3,3,3-trifluoropropene (R-1243zf). The new equation for R-1234ze(Z), which is mainly discussed in this paper, is applicable to ranges at lower temperatures or higher pressures compared to the first published equation, and uncertainties in liquid-phase sound speeds are greatly improved. The equation is valid at temperatures between 238 K and 440 K at pressures up to 34 MPa. Estimated uncertainties in this range are 0.1 % for vapor pressures at temperatures above 300 K and 0.3 % at lower temperatures, 0.1 % for liquid-phase densities, 0.3 % for vapor-phase densities, 0.02 % for vapor-phase sound speeds, and 0.05 % for liquidphase sound speeds, except in the critical region where larger deviations up to about 1 % are observed in density. The equation shows reasonable extrapolation behavior at extremely low and high temperatures, and at high pressures.

Citation

Journal of Chemical and Engineering Data

Pub Type

Journals

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DOI Link

Citation

Akasaka, R. and Lemmon, E. (2019), New Fundamental Equations of State for cis-1,3,3,3-Tetrafluoropropene [R-1234ze(Z)] and 3,3,3-Trifluoropropene (R-1243zf), Journal of Chemical and Engineering Data, [online], https://doi.org/10.1021/acs.jced.9b00007 (Accessed May 13, 2026)

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