Speed of sound and phase equilibria for (CO2 + C3H8) mixtures

被引：4
|
作者：
Lozano-Martin, Daniel [1 ]
Susial, Rodrigo [1 ]
Hernandez, Pedro [1 ,2 ]
Fernandez-Vicente, Teresa E. [3 ]
Carmen Martin, M. [1 ]
Segovia, Jose J. [1 ]
机构：
[1] Univ Valladolid, TERMOCAL Res Grp, Res Inst Bioecon, Escuela Ingn Ind, Paseo Cauce 59, Valladolid 47011, Spain
[2] Inst Nacl Tecn Aerosp INTA, Madrid 28850, Spain
[3] Ctr Espanol Metrol CEM, Alfar 2, Madrid 2876, Spain
来源：
JOURNAL OF CHEMICAL THERMODYNAMICS | 2021年 / 158卷
关键词：
Speed of sound; Phase equilibria; Carbon dioxide; Propane; Heat capacities as perfect-gas; Acoustic virial coefficients; Density virial coefficients; VAPOR-LIQUID-EQUILIBRIA; DIOXIDE PLUS PROPANE; 2ND VIRIAL-COEFFICIENT; CARBON-DIOXIDE; THERMODYNAMIC PROPERTIES; SUPERCRITICAL CO2; BINARY-MIXTURES; PRESSURES; TEMPERATURES; EXTRACTION;
D O I：
10.1016/j.jct.2021.106464
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This work presents phase envelope and speed of sound data for the (0.60 CO2 + 0.40 C3H8) and (0.80 CO2 + 0.20 C3H8) binary mixtures. Phase equilibria was measured using a cylindrical resonator working in the microwave band whereas an acoustic resonator was used for speed of sound measurements. The experimental results were compared with GERG-2008 equation of state, obtaining average absolute deviations by 0.24% in pressure for phase equilibria data and 0.025% for speed of sound data. Speed of sound values were used to derive perfect-gas heat capacities, acoustic virial coefficients, and second density virial coefficients. In addition, AGA8-DC92 equation of state performance was checked for the results derived from speeds of sound. (C) 2021 Elsevier Ltd.
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页数：15
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