2
0
2017
tsa
sta
0
journal
Original
Tsankova, G.[Gergana]
Stanwix, P. L.[Paul L.]
May, E. F.[Eric F.]
Richter, M.[Markus]
J. Chem. Eng. Data
2017
2020-09-29
Densities, Dielectric Permittivities, and Dew Points for (Argon + Carbon Dioxide) Mixtures Determined with a Microwave Re-entrant Cavity Resonator
A microwave re-entrant cavity resonator was used for the determination of dew points, dielectric permittivities, and molar densities of two gravimetrically prepared (argon + carbon dioxide) mixtures, with carbon dioxide mole fractions of 0.9495 and 0.7509. Isochoric dew-point measurements of a (0.0505 argon + 0.9495 carbon dioxide) mixture were carried out over the temperature range from (257 to 291) K at pressures between (2.4 and 6.0) MPa. The measured dew-point pressures were consistent with the predictions of the recently developed multiparameter equation of state optimized for combustion gases (EOS-CG) within 0.35 %. Measurements of each mixture s dielectric permittivity in the single-phase gas region over the temperature range from (273.2 to 313.3) K at pressures up to 6.5 MPa were used to determine the mixture molar densities at the same conditions. The method used to determine mixture molar densities from microwave-cavity measurements is based on an inversion of the polarizability mixing rule developed by Harvey and Prausnitz. The microwave-determined mixture densities had relative deviations from values measured for the same mixture with a two-sinker magnetic-suspension densimeter of 0.3 % or less. The new mixture density data agree within 0.37 % of predictions made using the EOS-CG and help identify literature data sets that should receive lower weighting in future model development.
Argon, Carbon dioxide, Dew-point measurements, Dielectric permittivity, Fluid
density, Gas mixture, Microwave re-entrant cavity resonator, Polarizability
10.1021/acs.jced.6b01043
9
62
2521-2532
1
InChI=1S/Ar
XKRFYHLGVUSROY-UHFFFAOYSA-N
argon
R-740
Ar
1
Commercial source
1
99.99
4
Stated by supplier
2
InChI=1S/CO2/c2-1-3
CURLTUGMZLYLDI-UHFFFAOYSA-N
carbon dioxide
CO2
1
Commercial source
1
99.99
4
Stated by supplier
1
2
1
1
1
Principal objective of the work
EP
EP
3/20/2017
1
Vapor or sublimation pressure, kPa
re-entrant cavity resonator
Gas
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Gas
Liquid
1
Mole fraction
1
Gas
0.0505
3
1
Temperature, K
Gas
1
291.134
6
1
6007.7
5
1
465.5
1
288.008
6
1
5547.2
5
1
429.8
1
284.395
6
1
5056.5
5
1
391.7
1
280.935
6
1
4622.8
5
1
358.2
1
277.242
6
1
4194.6
5
1
325
1
277.145
6
1
4183.7
5
1
324.1
1
272.696
6
1
3711.9
5
1
287.6
1
268.485
6
1
3304.9
5
1
256.1
1
263.577
6
1
2874.9
5
1
222.7
1
257.544
6
1
2406
5
1
186.4
2
2
1
1
1
Principal objective of the work
EP
EP
3/20/2017
1
Relative permittivity at zero frequency
Reentrant cavity resonator
Gas
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Gas
1
Mole fraction
1
Gas
0.0505
3
1
Temperature, K
Gas
2
Pressure, kPa
Gas
1
313.3
6
2
7027.1
5
1
1.09523
6
1
0.00059
1
313.303
6
2
6550
5
1
1.08408
6
1
0.00059
1
313.299
6
2
6028.4
5
1
1.07333
6
1
0.00058
1
313.296
6
2
5566.4
5
1
1.06488
6
1
0.00058
1
313.295
6
2
5083
5
1
1.05688
6
1
0.00057
1
313.299
6
2
4550.7
5
1
1.04884
6
1
0.00057
1
313.29
6
2
4089.6
5
1
1.04247
6
1
0.00056
1
313.262
6
2
3592.1
5
1
1.03607
6
1
0.00056
1
313.265
6
2
3052
5
1
1.02963
6
1
0.00056
1
313.262
6
2
2602.6
5
1
1.02461
6
1
0.00055
1
313.277
6
2
7083.6
5
1
1.0967
6
1
0.00059
1
283.244
6
2
1029.9
5
1
1.01008
6
1
0.00055
1
283.24
6
2
2006.1
5
1
1.0212
6
1
0.00055
1
283.234
6
2
4007.7
5
1
1.05273
6
1
0.00057
1
283.234
6
2
4493.9
5
1
1.06407
6
1
0.00057
1
283.24
6
2
3973.7
5
1
1.05203
6
1
0.00057
1
283.235
6
2
2998.2
5
1
1.03482
6
1
0.00056
1
283.235
6
2
2011.5
5
1
1.02127
6
1
0.00055
1
283.229
6
2
969.4
4
1
1.00945
6
1
0.00055
1
292.669
6
2
6086.3
5
1
1.10382
6
1
0.0006
1
289.873
6
2
5632
5
1
1.09119
6
1
0.00059
1
283.443
6
2
4710.8
5
1
1.06985
6
1
0.00058
1
279.734
6
2
4266.1
5
1
1.06129
6
1
0.00057
1
271.396
6
2
3365.6
5
1
1.04566
6
1
0.00056
1
266.153
6
2
2919.5
5
1
1.03887
6
1
0.00056
1
260.141
6
2
2446.9
5
1
1.03197
6
1
0.00056
1
255.103
6
2
2068.9
5
1
1.02661
6
1
0.00055
1
294.268
6
2
6419.2
5
1
1.11591
6
1
0.0006
1
279.728
6
2
4267.8
5
1
1.06132
6
1
0.00057
3
2
1
1
1
Principal objective of the work
EP
EP
3/20/2017
1
Relative permittivity at zero frequency
Reentrant cavity resonator
Gas
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Gas
1
Mole fraction
1
Gas
0.2491
4
1
Temperature, K
Gas
2
Pressure, kPa
Gas
1
273.211
6
2
506.6
4
1
1.0045
5
1
0.0004
1
273.2
6
2
1001.6
5
1
1.0091
5
1
0.0004
1
273.199
6
2
2004.3
5
1
1.0195
5
1
0.0004
1
273.203
6
2
3008.7
5
1
1.0314
5
1
0.0004
1
273.204
6
2
4029
5
1
1.0459
5
1
0.0004
1
273.2
6
2
4487
5
1
1.0535
5
1
0.0004
1
273.202
6
2
454.8
4
1
1.004
5
1
0.0004
1
273.201
6
2
962.7
4
1
1.0088
5
1
0.0004
1
273.201
6
2
2014.8
5
1
1.0196
5
1
0.0004
1
283.245
6
2
1008.9
5
1
1.0088
5
1
0.0004
1
283.25
6
2
2012.2
5
1
1.0186
5
1
0.0004
1
283.24
6
2
2993.3
5
1
1.0294
5
1
0.0004
1
283.242
6
2
2992.8
5
1
1.0294
5
1
0.0004
1
283.24
6
2
3995.6
5
1
1.042
5
1
0.0004
1
283.242
6
2
4991.8
5
1
1.0568
5
1
0.0004
1
283.235
6
2
5983.5
5
1
1.0748
5
1
0.0004
1
283.233
6
2
6491.3
5
1
1.0858
5
1
0.0004
1
283.235
6
2
5987
5
1
1.0749
5
1
0.0004
1
283.239
6
2
4006.4
5
1
1.0421
5
1
0.0004
1
283.239
6
2
2002
5
1
1.0185
5
1
0.0004
1
283.232
6
2
492.8
4
1
1.0042
5
1
0.0004
1
293.268
6
2
1007.1
5
1
1.0085
5
1
0.0004
1
293.272
6
2
2005.7
5
1
1.0177
5
1
0.0004
1
293.273
6
2
3006.2
5
1
1.0279
5
1
0.0004
1
293.276
6
2
3999.6
5
1
1.0393
5
1
0.0004
1
293.271
6
2
4993.4
5
1
1.0523
5
1
0.0004
1
293.277
6
2
5994.6
5
1
1.0674
5
1
0.0004
1
293.272
6
2
6499.2
5
1
1.0761
5
1
0.0004
1
293.271
6
2
5847.6
5
1
1.0651
5
1
0.0004
1
293.273
6
2
4006.6
5
1
1.0394
5
1
0.0004