A novel technique based on a cylindrical microwave resonator for high pressure phase equilibrium determination
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866914948098031616 |
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| author | Susial, Rodrigo Gómez-Hernández, Ángel Lozano-Martín, Daniel del Campo, Dolores Martín, M. Carmen Segovia, José J. |
| author_facet | Susial, Rodrigo Gómez-Hernández, Ángel Lozano-Martín, Daniel del Campo, Dolores Martín, M. Carmen Segovia, José J. |
| contents | 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 $ε$($p$,$T$). 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_08144 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A novel technique based on a cylindrical microwave resonator for high pressure phase equilibrium determination Susial, Rodrigo Gómez-Hernández, Ángel Lozano-Martín, Daniel del Campo, Dolores Martín, M. Carmen Segovia, José J. Chemical Physics 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 $ε$($p$,$T$). 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. |
| title | A novel technique based on a cylindrical microwave resonator for high pressure phase equilibrium determination |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2409.08144 |