A simple acoustic probe for fluid phase equilibria: Application to the CO2 + N(C2H5)3 system

Nuno Ribeiro; Ana Aguiar-Ricardo

doi:10.1016/S0378-3812(01)00478-2

A simple acoustic probe for fluid phase equilibria: Application to the CO2 + N(C2H5)3 system

Nuno Ribeiro, Ana Aguiar-Ricardo

Research output: Contribution to journal › Article

8 Citations (Scopus)

Abstract

An acoustic technique was applied to investigate the critical behaviour of CO₂+N(C₂H₅)₃. This study is part of a major programme on the determination of the critical behaviour of a series of tertiary amines in supercritical CO₂. Measurements of the critical temperature T_c and pressure p_c of the binary mixture of xCO₂+(1-x)N(C₂H₅)₃ were performed restricted to the region richer in carbon dioxide, in the CO₂ mole fraction range 1-0.911. The Peng-Robinson equation of state with conventional mixing and combining rules, was used to correlate the binary experimental data. The course of the whole binary critical line was extrapolated. Additionally, this paper briefly reviews the experimental methods for determining critical properties. The theoretical basis of our acoustic method and the systems studied are discussed.

Original language	English
Pages (from-to)	295-303
Number of pages	9
Journal	Fluid Phase Equilibria
Volume	185
Issue number	1-2
DOIs	https://doi.org/10.1016/S0378-3812(01)00478-2
Publication status	Published - 30 Jul 2001

Keywords

Acoustic method
Binary mixture
Critical parameters
Phase behaviour

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Ribeiro, N., & Aguiar-Ricardo, A. (2001). A simple acoustic probe for fluid phase equilibria: Application to the CO2 + N(C2H5)3 system. Fluid Phase Equilibria, 185(1-2), 295-303. https://doi.org/10.1016/S0378-3812(01)00478-2

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title = "A simple acoustic probe for fluid phase equilibria: Application to the CO2 + N(C2H5)3 system",

abstract = "An acoustic technique was applied to investigate the critical behaviour of CO2+N(C2H5)3. This study is part of a major programme on the determination of the critical behaviour of a series of tertiary amines in supercritical CO2. Measurements of the critical temperature Tc and pressure pc of the binary mixture of xCO2+(1-x)N(C2H5)3 were performed restricted to the region richer in carbon dioxide, in the CO2 mole fraction range 1-0.911. The Peng-Robinson equation of state with conventional mixing and combining rules, was used to correlate the binary experimental data. The course of the whole binary critical line was extrapolated. Additionally, this paper briefly reviews the experimental methods for determining critical properties. The theoretical basis of our acoustic method and the systems studied are discussed.",

keywords = "Acoustic method, Binary mixture, Critical parameters, Phase behaviour",

author = "Nuno Ribeiro and Ana Aguiar-Ricardo",

note = "Financial support from Funda{\cc}{\~a}o para a Ci{\^e}ncia e Tecnologia, through Contract numbers PBIC/C/QUI/2134/95, PRAXIS/P/QUI/10075/1998 and PraxisXXI/BD/16081/98; European Commission, through Contract number ERBFMXR-CT-97-0104; Funda{\cc}{\~a}o Calouste Gulbenkian and Conselho de Reitores das Universidades Portuguesas, through Grant number B-39/98, is gratefully acknowledged.",

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doi = "10.1016/S0378-3812(01)00478-2",

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AB - An acoustic technique was applied to investigate the critical behaviour of CO2+N(C2H5)3. This study is part of a major programme on the determination of the critical behaviour of a series of tertiary amines in supercritical CO2. Measurements of the critical temperature Tc and pressure pc of the binary mixture of xCO2+(1-x)N(C2H5)3 were performed restricted to the region richer in carbon dioxide, in the CO2 mole fraction range 1-0.911. The Peng-Robinson equation of state with conventional mixing and combining rules, was used to correlate the binary experimental data. The course of the whole binary critical line was extrapolated. Additionally, this paper briefly reviews the experimental methods for determining critical properties. The theoretical basis of our acoustic method and the systems studied are discussed.

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