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Title: | Binary Diffusion Coefficients for Short Chain Alcohols in Supercritical Carbon Dioxide-Experimental and Predictive Correlations | Authors: | Santos, Cecília I. A. V. Ribeiro, Ana C. F. Shevtsova, Valentina |
Keywords: | supercritical carbon dioxide; FTIR; Taylor dispersion technique; methanol; ethanol; propanol; butanol; Widom line | Issue Date: | 12-Jan-2023 | Publisher: | MDPI | Project: | POCI-01-0145-FEDER-030271 UIDB/00313/2020 UIDP/00313/2020 micro4IloT (Grant No. KK-2021/00082) from the Basque government PID2020115086GB-C33 financed by MCIN/AEI of the Spanish Government |
Serial title, monograph or event: | Molecules | Volume: | 28 | Issue: | 2 | Abstract: | Experimental binary diffusion coefficients for short-chain alcohols in supercritical carbon dioxide were measured using the Taylor dispersion technique in a temperature range of 306.15 K to 331.15 K and along the 10.5 MPa isobar. The obtained diffusion coefficients were in the order of 10-8 m2 s-1. The dependence of D on temperature and solvent density was examined together with the influence of molecular size. Some classic correlation models based on the hydrodynamic and free volume theory were used to estimate the diffusion coefficients in supercritical carbon dioxide. Predicted values were generally overestimated in comparison with experimental ones and correlations were shown to be valid only in high-density regions. | URI: | https://hdl.handle.net/10316/114849 | ISSN: | 1420-3049 | DOI: | 10.3390/molecules28020782 | Rights: | openAccess |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais I&D CQC - Artigos em Revistas Internacionais |
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Binary-Diffusion-Coefficients-for-Short-Chain-Alcohols-in-Supercritical-Carbon-DioxideExperimental-and-Predictive-CorrelationsMolecules.pdf | 2.65 MB | Adobe PDF | View/Open |
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