| Autor: |
Susial, Rodrigo, Gómez-Hernández, Ángel, Lozano-Martín, Daniel, del Campo, Dolores, Martín, M. Carmen, Segovia, José J. |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
The Journal of Chemical Thermodynamics Volume 135, 2019, Pages 124-132 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1016/j.jct.2019.03.027 |
| Popis: |
The development of a novel technique based on a cylindrical microwave resonator for high pressure phase equilibrium determination is described. Electric permittivity or dielectric constant is a physical property that depends on temperature and pressure $\epsilon$($p$,$T$). Based on this property, a measuring technique consisting of a cylindrical resonant cavity that works in the microwave spectrum has been developed. Equilibrium data of fluid mixtures are measured at high pressure using a synthetic method, where phase transition is determined under isothermal conditions due to the change of the dielectric constant. This technique may be a more accurate alternative to conventional visual synthetic methods. The technique was validated measuring pure $CO_{2}$, and phase behaviour was then determined for two binary mixtures [$CO_{2}$ (0.6) + $CH_{4}$ (0.4)] and [$CO_{2}$ (0.4) + $CH_{4}$ (0.6)], results for which are presented. These systems are interesting for the study of biogas-like mixtures. In addition, data were compared with the equation of state used for natural gas GERG-2008, and also, they were modelled using Peng-Robinson equation of state and Wong-Sandler mixing rules, which are widely employed in chemical industries and which give good results. |
| Databáze: |
arXiv |
| Externí odkaz: |
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