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An Equation of State for the Thermodynamic Properties of Dimethyl Ether
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10.1063/1.3582533
/content/aip/journal/jpcrd/40/2/10.1063/1.3582533
http://aip.metastore.ingenta.com/content/aip/journal/jpcrd/40/2/10.1063/1.3582533

Figures

Image of FIG. 1.
FIG. 1.

Reported critical temperatures of dimethyl ether as a function of the year published.

Image of FIG. 2.
FIG. 2.

Reported critical densities of dimethyl ether as a function of the year published.

Image of FIG. 3.
FIG. 3.

Reported critical pressures of dimethyl ether as a function of the year published.

Image of FIG. 4.
FIG. 4.

Comparisons of ideal gas heat capacities calculated with Eq. (7) to experimental and theoretical data as a function of temperature.

Image of FIG. 5.
FIG. 5.

Comparisons of vapor pressures calculated with the equation of state to experimental data as a function of temperature (the range of the -axis is ). The solid line corresponds to values calculated from the ancillary equation, Eq. (1). The dashed line corresponds to values calculated from the equation of state of Ihmels and Lemmon.12

Image of FIG. 6.
FIG. 6.

Comparisons of vapor pressures calculated with the equation of state to experimental data as a function of temperature (the range of the -axis is ). The line corresponds to values calculated from the ancillary equation, Eq. (1). The dashed line corresponds to values calculated from the equation of state of Ihmels and Lemmon.12

Image of FIG. 7.
FIG. 7.

Comparisons of saturated liquid densities calculated with the equation of state to experimental data as a function of temperature. The line corresponds to values calculated from the ancillary equation, Eq. (2). The dashed line corresponds to values calculated from the equation of state of Ihmels and Lemmon.12

Image of FIG. 8.
FIG. 8.

Comparisons of saturated vapor densities calculated with the equation of state to experimental data as a function of temperature. The line corresponds to values calculated from the ancillary equation, Eq. (3). The dashed line corresponds to values calculated from the equation of state of Ihmels and Lemmon.12

Image of FIG. 9.
FIG. 9.

Experimetal data as a function of temperature and pressure.

Image of FIG. 10.
FIG. 10.

Comparisons of densities calculated with the equation of state to experimental data as a function of pressure. The dashed line corresponds to values calculated from the equation of state of Ihmels and Lemmon.12

Image of FIG. 11.
FIG. 11.

Comparison of second virial coefficients B calculated with the equation of state to experimental data as a function of temperature. The dashed line corresponds to values calculated from the equation of state of Ihmels and Lemmon.12

Image of FIG. 12.
FIG. 12.

Comparison of third virial coefficients C calculated with the equation of state to experimental data as a function of temperature. The dashed line corresponds to values calculated from the equation of state of Ihmels and Lemmon.12

Image of FIG. 13.
FIG. 13.

Calculations of along isotherms versus density in the vapor-phase region and two-phase region. Isotherms are shown at temperatures of 220, 240, 260, 280, 300, 400.378, 500, 600, 700, 800, 900, and .

Image of FIG. 14.
FIG. 14.

Experimental caloric data as a function of temperature and pressure.

Image of FIG. 15.
FIG. 15.

Comparisons of saturation heat capacities calculated with the equation of state to experimental data as a function of temperature. The dashed line corresponds to values calculated from the equation of state of Ihmels and Lemmon.12

Image of FIG. 16.
FIG. 16.

Comparisons of two-phase isochoric heat capacities calculated with the equation of state to experimental data as a function of temperature. The dashed line corresponds to values calculated from the equation of state of Ihmels and Lemmon.12

Image of FIG. 17.
FIG. 17.

Comparisons of isobaric heat capacities calculated with the equation of state to experimental data as a function of temperature.

Image of FIG. 18.
FIG. 18.

Comparisons of isochoric heat capacities calculated with the equation of state to experimental data as a function of temperature.

Image of FIG. 19.
FIG. 19.

Isochoric heat capacity versus temperature. Isobars are shown at pressures of 0, 0.1, 0.5, 1, 2, 3, 4, 5, 6, 8, 10, 20, 50, 100, 200, 500, 1000, 2000, and . The dashed line and the dotted line are shown at the triple-point temperature and the critical-point temperature , respectively.

Image of FIG. 20.
FIG. 20.

Isobaric heat capacity versus temperature. Isobars are shown at pressures of 0, 0.1, 0.5, 1, 2, 3, 4, 5, 6, 8, 10, 20, 50, 100, 200, 500, 1000, 2000, and . The dashed line and the dotted line are shown at the triple-point temperature and the critical-point temperature , respectively.

Image of FIG. 21.
FIG. 21.

Sound speed w versus temperature. Isobars are shown at pressures of 0, 0.1, 0.5, 1, 2, 3, 4, 5, 6, 8, 10, 20, 50, 100, 200, 500, 1000, 2000, and . The dashed line and the dotted line are shown at the triple-point temperature and the critical-point temperature , respectively.

Image of FIG. 22.
FIG. 22.

Isobaric behavior of the equation of state for dimethyl ether. Isobars are shown at pressures of 0.1, 0.2, 0.5, 1, 2, , 10, 20, 50, 100, 200, 500, and . The rectilinear diameter is shown in the diagram.

Image of FIG. 23.
FIG. 23.

Isothermal behavior of the equation of state at extreme conditions of temperature and pressure. Isotherms are shown at temperatures of , 150, 200, 250, 300, 350, , 500, 1000, 5000, 10 000, 50 000, 100 000, 500 000, and .

Image of FIG. 24.
FIG. 24.

Characteristic (ideal) curves of the equation of state as a function of reduced temperature and reduced pressure .

Tables

Generic image for table
TABLE 1.

Physical constants and characteristic properties of dimethyl ether

Generic image for table
TABLE 2.

Published critical parameters of dimethyl ether

Generic image for table
TABLE 3.

Summary of vapor-pressure data for dimethyl ether

Generic image for table
TABLE 4.

Summary of saturated-liquid density data for dimethyl ether

Generic image for table
TABLE 5.

Summary of saturated-vapor density data for dimethyl ether

Generic image for table
TABLE 6.

Summary of and virial-coefficient data for dimethyl ether

Generic image for table
TABLE 7.

Summary of caloric data for dimethyl ether

Generic image for table
TABLE 8.

The coefficients and exponents of the equation of state

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/content/aip/journal/jpcrd/40/2/10.1063/1.3582533
2011-06-08
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: An Equation of State for the Thermodynamic Properties of Dimethyl Ether
http://aip.metastore.ingenta.com/content/aip/journal/jpcrd/40/2/10.1063/1.3582533
10.1063/1.3582533
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