Microwave Heating Improvement: Permittivity Characterization of Water–Ethanol and Water–NaCl Binary Mixtures
Microwave heating offers a lot of advantages compared to conventional heating methods in the chemical reactions field due to its positive effects on reaction time and selectivity. Dielectric properties, and in particular permittivity, of substances and mixtures, are important for the optimization of...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/18/4861 |
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| author | Fabio Fanari Giacomo Muntoni Chiara Dachena Renzo Carta Francesco Desogus |
| author_facet | Fabio Fanari Giacomo Muntoni Chiara Dachena Renzo Carta Francesco Desogus |
| author_sort | Fabio Fanari |
| collection | DOAJ |
| description | Microwave heating offers a lot of advantages compared to conventional heating methods in the chemical reactions field due to its positive effects on reaction time and selectivity. Dielectric properties, and in particular permittivity, of substances and mixtures, are important for the optimization of microwave heating processes; notwithstanding this, specific databases are poor and far from being complete, and in the scientific literature very little data regarding these properties can be found. In this work, impedance measurements were carried out using a specially designed system to get the real and imaginary parts of the dielectric constant. The apparatus was tested in the estimation of permittivity of water–ethanol and water–NaCl mixtures, varying their composition to obtain a wide range of permittivity values. The results were compared to literature data and fitted with available literature models to verify the correspondence between them, finding that permittivity dependence on mixture composition can be effectively described by the models. |
| first_indexed | 2024-03-10T16:16:32Z |
| format | Article |
| id | doaj.art-c772d2ec24d04483a4167a0db0fc296a |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T16:16:32Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-c772d2ec24d04483a4167a0db0fc296a2023-11-20T14:01:58ZengMDPI AGEnergies1996-10732020-09-011318486110.3390/en13184861Microwave Heating Improvement: Permittivity Characterization of Water–Ethanol and Water–NaCl Binary MixturesFabio Fanari0Giacomo Muntoni1Chiara Dachena2Renzo Carta3Francesco Desogus4Department of Mechanical, Chemical and Material Engineering, University of Cagliari, 09123 Cagliari, ItalyDepartment of Electric and Electronic Engineering, University of Cagliari, 09123 Cagliari, ItalyDepartment of Electric and Electronic Engineering, University of Cagliari, 09123 Cagliari, ItalyDepartment of Mechanical, Chemical and Material Engineering, University of Cagliari, 09123 Cagliari, ItalyDepartment of Mechanical, Chemical and Material Engineering, University of Cagliari, 09123 Cagliari, ItalyMicrowave heating offers a lot of advantages compared to conventional heating methods in the chemical reactions field due to its positive effects on reaction time and selectivity. Dielectric properties, and in particular permittivity, of substances and mixtures, are important for the optimization of microwave heating processes; notwithstanding this, specific databases are poor and far from being complete, and in the scientific literature very little data regarding these properties can be found. In this work, impedance measurements were carried out using a specially designed system to get the real and imaginary parts of the dielectric constant. The apparatus was tested in the estimation of permittivity of water–ethanol and water–NaCl mixtures, varying their composition to obtain a wide range of permittivity values. The results were compared to literature data and fitted with available literature models to verify the correspondence between them, finding that permittivity dependence on mixture composition can be effectively described by the models.https://www.mdpi.com/1996-1073/13/18/4861Acree modeldielectric constantethanolimpedanceKing and Queen modelmicrowave heating |
| spellingShingle | Fabio Fanari Giacomo Muntoni Chiara Dachena Renzo Carta Francesco Desogus Microwave Heating Improvement: Permittivity Characterization of Water–Ethanol and Water–NaCl Binary Mixtures Energies Acree model dielectric constant ethanol impedance King and Queen model microwave heating |
| title | Microwave Heating Improvement: Permittivity Characterization of Water–Ethanol and Water–NaCl Binary Mixtures |
| title_full | Microwave Heating Improvement: Permittivity Characterization of Water–Ethanol and Water–NaCl Binary Mixtures |
| title_fullStr | Microwave Heating Improvement: Permittivity Characterization of Water–Ethanol and Water–NaCl Binary Mixtures |
| title_full_unstemmed | Microwave Heating Improvement: Permittivity Characterization of Water–Ethanol and Water–NaCl Binary Mixtures |
| title_short | Microwave Heating Improvement: Permittivity Characterization of Water–Ethanol and Water–NaCl Binary Mixtures |
| title_sort | microwave heating improvement permittivity characterization of water ethanol and water nacl binary mixtures |
| topic | Acree model dielectric constant ethanol impedance King and Queen model microwave heating |
| url | https://www.mdpi.com/1996-1073/13/18/4861 |
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