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Vapor-liquid phase equilibrium data of CO<inf>2</inf> in some physical solvents from 285.19 K to 313.26 K

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Authors
Gui, X.
Wang, Wei
Wang, C.
Zhang, L.
Yun, Z.
Tang, Z.
Date
2014
Type
Journal Article

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Gui, X. and Wang, W. and Wang, C. and Zhang, L. and Yun, Z. and Tang, Z. 2014. Vapor-liquid phase equilibrium data of CO<inf>2</inf> in some physical solvents from 285.19 K to 313.26 K. Journal of Chemical & Engineering Data. 59 (3): pp. 844-849.
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Journal of Chemical & Engineering Data
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Department of Chemical Engineering
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Abstract

The solubility of CO 2 in polyethylene glycol dimethyl ether (NHD), octamethyl cyclotetrasiloxane (D4), and diethyl succinate (DS) was determined at the temperature variations from 285.19 K to 313.26 K up to 6 MPa by the constant-volume method. Then, Henry's law constant (H) based on mole fraction was obtained by linear fitting of the vapor-liquid phase equilibrium data, and some thermodynamic properties of solutions were also calculated from the correlation of H. The values of H in NHD, D4, and DS vary from 2.5 MPa to 8 MPa and increase in the following order: DS < D4 < NHD, which is identical to the order of the solvents ability to dissolve CO 2 . Additionally, Henry's law constant increases with temperature increase to confirm the solubility of CO 2 decrease in the corresponding solvents for the pressure range studied. © 2014 American Chemical Society.