Título
FTIR as a Powerful Tool for Measurements of Diffusion in Supercritical Carbon Dioxide Using Taylor Dispersion MethodAutor-a
Autor-a (de otra institución)
Otras instituciones
Universidade de CoimbraVersión
Version publicada
Derechos
© 2022 The AuthorsAcceso
Acceso abiertoVersión del editor
https://doi.org/10.3390/pr10081528Publicado en
Processes Vol. 10. Nº. 8. Article 1528. August, 2022Editor
MDPIPalabras clave
supercritical CO2
CCS
FTIR
Diffusion ... [+]
CCS
FTIR
Diffusion ... [+]
supercritical CO2
CCS
FTIR
Diffusion
toluene
benzene [-]
CCS
FTIR
Diffusion
toluene
benzene [-]
Resumen
A new experimental high-pressure setup for measuring diffusion coefficients in supercritical fluids, based on Taylor dispersion method, and using an FTIR detector to operate up to 25.0 MPa was designe ... [+]
A new experimental high-pressure setup for measuring diffusion coefficients in supercritical fluids, based on Taylor dispersion method, and using an FTIR detector to operate up to 25.0 MPa was designed and optimized. Tracer diffusivities, D12, of toluene and benzene in supercritical carbon dioxide were measured in the temperature range of 306.15–320.15 K, and pressure range of 7.5–17 MPa to evaluate the setup and experimental protocol. The effects of flow velocity, volume of the cell, absorbance at different wavenumbers on the diffusion coefficient as well as all parameters respecting the Taylor dispersion method have been analyzed. The obtained diffusion coefficients are in excellent agreement with the available literature data. The dependence of D12 on temperature, pressure, and solvent density were examined. Some correlation models based on the hydrodynamic theory were used to estimate the diffusion coefficients in supercritical carbon dioxide, which is the best agreement obtained for an improved version of the Wilke–Chang model. [-]
Sponsorship
Comisión EuropeaID Proyecto
info:eu-repo/grantAgreement/EC/Fondo Europeo de Desarrollo Regional (FEDER)/POCI-01-0145-FEDER-030271/EU/Difusão Molecular e Difusão Térmica de CO2 em misturas modelo próximo do ponto crítico/KIDIMIXColecciones
- Artículos - Ingeniería [639]
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