1. Speed of sound and phase equilibria for (CO2 + C3H8) mixtures
- Author
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Rodrigo Susial, Pedro Pablo Pérez Hernández, Teresa E. Fernández-Vicente, M. Carmen Martín, José J. Segovia, and Daniel Lozano-Martín
- Subjects
geography ,Equation of state ,Work (thermodynamics) ,geography.geographical_feature_category ,Chemistry ,Phase (waves) ,Astrophysics::Cosmology and Extragalactic Astrophysics ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Computational physics ,Resonator ,020401 chemical engineering ,Virial coefficient ,Computer Science::Sound ,Speed of sound ,General Materials Science ,0204 chemical engineering ,Physical and Theoretical Chemistry ,Sound (geography) ,Phase diagram - Abstract
Highlights • Carbon dioxide + propane mixtures are studied through accurate measurements of speeds of sound and phase equilibria. • Heat capacities and virial coefficients are obtained from speeds of sound. • Retrograde condensation zone is found for the (0.60 CO2 + 0.40 C3H8) mixture. • Results are compared with reference equations of state such as GERG-2008 and AGA8-DC92. 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.
- Published
- 2021
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