Isochoric specific heat capacity of trans -1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and the HFO-1234ze(E) + CO2 mixture in the liquid phase

Kenichi Yamaya, Atsushi Matsuguchi, Noboru Kagawa, Shigeru Koyama

    研究成果: Contribution to journalArticle

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    The isochoric specific heat capacity (cV) of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and mole fraction x = 0.489 HFO-1234ze(E) + (1 - x) = 0.511 CO2 in the liquid phase were measured with a twin-cell type adiabatic calorimeter. The sample purity of HFO-1234ze(E) and CO2 was certified to have a minimum purity of 0.9996 mole fraction and 0.99999 mole fraction respectively by gas chromatographic analysis. The measurements were obtained for temperatures ranging from (270 to 425) K and at pressures up to 30 MPa. Temperatures were measured with a platinum resistance thermometer on the bottom of each cell and were reported based on the International Temperature Scale of 1990 (ITS-90). Sample pressures were measured with a quartz crystal transducer. Densities were calculated from the volume of the calorimeter cell and the sample mass. The expanded uncertainty (with a coverage factor k = 2) of temperature measurements is 13 mK and 8 kPa for pressure measurements. The expanded relative uncertainty of density is 0.16 %. As a result, the experimental expanded relative uncertainty of the isochoric specific heat capacity (cV) is estimated to be from 3.8 % to 4.6 % in the liquid phase. The cV measurements were almost the same as the values calculated from the proposed equations of state except near the critical isochore.

    ジャーナルJournal of Chemical and Engineering Data
    出版物ステータス出版済み - 4 14 2011

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Chemical Engineering(all)

    フィンガープリント Isochoric specific heat capacity of trans -1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and the HFO-1234ze(E) + CO<sub>2</sub> mixture in the liquid phase' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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