Trihexyl(tetradecyl)phosphonium bromide:liquid density, surface tension and solubility of carbondioxide

Manic, Marina S. and Macedo, Eugenia A. and Najdanovic, Vesna (2012) Trihexyl(tetradecyl)phosphonium bromide:liquid density, surface tension and solubility of carbondioxide. Fluid Phase Equilibria, 324. pp. 8-12. ISSN 0378-3812

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Vapour-liquid equilibria of ionic liquid - carbon dioxide systems, as well as thermo-physical properties of the system components are very important to design and optimize various separation and reaction processes. In this work the solubility of carbon dioxide (CO2) in trihexyl(tetradecyl)phosphonium bromide([THTDP][Br]) was measured using a high-pressure sapphire cell, in pressure range of 8-22 MPa and at two temperatures, 313.2 K and 323.2 K. The thermophysical properties, namely liquid density and surface tension of the ionic liquid were determined in temperature range of 293.2-343.2 K. The densities predicted by Gardas and Coutinho model showed good agreement with the experimental data obtained in this work. The critical temperature of [THTDP][Br] was estimated using the Eotvos correlation. Moreover, these experimental and calculated data gave an opportunity to apply the Peng-Robinson equation of state (PR-EoS) in order to predict/correlate the behaviour of the studied system, ([THTDP][Br] + CO2) with satisfactory results. (C) 2012 Published by Elsevier B.V.

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Journal Article
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Fluid Phase Equilibria
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Deposited On:
07 Feb 2013 15:00
Last Modified:
21 Nov 2022 23:19