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Détermination in-situ de la composition du mélange H2O/liquide ionique par spectroscopie dans le proche infrarouge afin d’étudier le processus d’absorption de l’eau dans la solution.

Determination in-situ of the ionic liquid/H2O mixture composition by near-infrared spectroscopy to study the absorption process of water into the solution.

Numéro : 2059

Auteurs : LARRECHI M. S., SALAVERA D., PRIETO J., CORONAS A.

Résumé

Ionic liquids are promising absorbents for absorption heat pumps thanks to their suitable properties, such as a low vapor pressure or the high and specific solubility for the refrigerants. Although, they also present some drawbacks as high viscosity and low mass diffusivity. For this reason, it is interesting to study experimentally the absorption process with these new absorbents. The absorption performance, in terms of refrigerant absorption rate, requires knowing the composition of the refrigerant/absorbent mixture, which usually is determined from the density measurement. However, in some cases, the change of the density with the composition is not enough to be detected by the densimeter. In this study, we have implemented the nearinfrared spectroscopic technique to determine in-situ the composition of a water + 1-ethyl-3- methylimidazolium acetate mixture, in a test-bench to study the absorption process in a falling-film absorber. The preliminary results show that this technique is suitable to determine the composition of a mixture in-situ in a test-bench, with similar results obtained from density measurement.

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Format PDF

Pages : 6

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    20 €

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    Gratuit

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Détails

  • Titre original : Determination in-situ of the ionic liquid/H2O mixture composition by near-infrared spectroscopy to study the absorption process of water into the solution.
  • Identifiant de la fiche : 30028929
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 6th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Date d'édition : 01/09/2021
  • DOI : http://dx.doi.org/10.18462/iir.TPTPR.2021.2059
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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