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In situ determination of dissolution kinetics of d-limonene in supercritical carbon dioxide by Raman spectroscopy

Buzolin, C. N.; Espina Palanco, M. LU ; Wendt, O. F. LU and Rodriguez-Meizoso, I. LU (2017) In New Journal of Chemistry 41(22). p.13929-13934
Abstract

The study of solvation in pressurized systems requires in situ analysis. An optimal spectroscopic technique for such studies would enable the detection of any compound and have resolution enough to differentiate different compounds within a multicomponent mixture. Here we show for the first time that we can follow dissolution kinetics of a model compound, d-limonene, in supercritical carbon dioxide using in situ Raman spectroscopy. Dissolution rate constants were measured at different stirring speeds, temperatures (45 and 55 °C) and amounts of CO2, corresponding to pressures in the range of 8.4 to 17.0 MPa. Dissolution half-lives ranged from 3 min (at 45 °C and 8.4 MPa) up to more than 1 hour (at 55 °C 16.9 MPa). The results... (More)

The study of solvation in pressurized systems requires in situ analysis. An optimal spectroscopic technique for such studies would enable the detection of any compound and have resolution enough to differentiate different compounds within a multicomponent mixture. Here we show for the first time that we can follow dissolution kinetics of a model compound, d-limonene, in supercritical carbon dioxide using in situ Raman spectroscopy. Dissolution rate constants were measured at different stirring speeds, temperatures (45 and 55 °C) and amounts of CO2, corresponding to pressures in the range of 8.4 to 17.0 MPa. Dissolution half-lives ranged from 3 min (at 45 °C and 8.4 MPa) up to more than 1 hour (at 55 °C 16.9 MPa). The results indicate that dissolution is mostly controlled by diffusion, while convection did not play a significant role. Dissolution rate constants showed a non-linear inverse relation with diffusivity, while temperature did not influence the dissolution rate constants significantly. Dissolution kinetics is revealed as a significant aspect to consider for the optimization of extraction and separation processes based on supercritical carbon dioxide. Overall, this study offers new insight into solvation phenomena in pressurized fluids.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
New Journal of Chemistry
volume
41
issue
22
pages
6 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85034650516
  • wos:000414440000083
ISSN
1144-0546
DOI
10.1039/c7nj02549a
language
English
LU publication?
yes
id
38e7e153-a51a-42f5-82d2-7f0ac1999c65
date added to LUP
2017-12-11 08:26:20
date last changed
2018-01-16 13:27:25
@article{38e7e153-a51a-42f5-82d2-7f0ac1999c65,
  abstract     = {<p>The study of solvation in pressurized systems requires in situ analysis. An optimal spectroscopic technique for such studies would enable the detection of any compound and have resolution enough to differentiate different compounds within a multicomponent mixture. Here we show for the first time that we can follow dissolution kinetics of a model compound, d-limonene, in supercritical carbon dioxide using in situ Raman spectroscopy. Dissolution rate constants were measured at different stirring speeds, temperatures (45 and 55 °C) and amounts of CO<sub>2</sub>, corresponding to pressures in the range of 8.4 to 17.0 MPa. Dissolution half-lives ranged from 3 min (at 45 °C and 8.4 MPa) up to more than 1 hour (at 55 °C 16.9 MPa). The results indicate that dissolution is mostly controlled by diffusion, while convection did not play a significant role. Dissolution rate constants showed a non-linear inverse relation with diffusivity, while temperature did not influence the dissolution rate constants significantly. Dissolution kinetics is revealed as a significant aspect to consider for the optimization of extraction and separation processes based on supercritical carbon dioxide. Overall, this study offers new insight into solvation phenomena in pressurized fluids.</p>},
  author       = {Buzolin, C. N. and Espina Palanco, M. and Wendt, O. F. and Rodriguez-Meizoso, I.},
  issn         = {1144-0546},
  language     = {eng},
  number       = {22},
  pages        = {13929--13934},
  publisher    = {Royal Society of Chemistry},
  series       = {New Journal of Chemistry},
  title        = {In situ determination of dissolution kinetics of d-limonene in supercritical carbon dioxide by Raman spectroscopy},
  url          = {http://dx.doi.org/10.1039/c7nj02549a},
  volume       = {41},
  year         = {2017},
}