2013
DOI: 10.1016/j.fluid.2013.07.036
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Application of the cubic-plus-association (CPA) equation of state to model the fluid phase behaviour of binary mixtures of water and tetrahydrofuran

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Cited by 13 publications
(6 citation statements)
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“…However, this system also exhibits non-ideal behavior in the form of the closed loop phase diagram. Detailed thermodynamic descriptions have been attempted considering the mutualassociation between THF and water as well as self-association between THF molecules [36] but have resulted only in correlation requiring three empirically fitted parameters. Since our attempt is to obtain only some estimates for THF-water interactions rather than represent the global thermodynamic behavior of this binary solvent mixture in liquid and vapor phases, in this paper we have used a constant interaction parameter v TW = 1.5 calculated using solubility parameters [37].…”
Section: Flory Interaction Parametersmentioning
confidence: 99%
“…However, this system also exhibits non-ideal behavior in the form of the closed loop phase diagram. Detailed thermodynamic descriptions have been attempted considering the mutualassociation between THF and water as well as self-association between THF molecules [36] but have resulted only in correlation requiring three empirically fitted parameters. Since our attempt is to obtain only some estimates for THF-water interactions rather than represent the global thermodynamic behavior of this binary solvent mixture in liquid and vapor phases, in this paper we have used a constant interaction parameter v TW = 1.5 calculated using solubility parameters [37].…”
Section: Flory Interaction Parametersmentioning
confidence: 99%
“…Few papers have studied the LLE data correlation of binary systems with closed loop behavior using different equations of state. For example, Herslund et al 28 studied the application of the cubic-plus-association (CPA) equation of state to model the LLE behavior of binary mixtures of water and tetrahydrofuran. Lee 29 used the perturbed sphere hard chain association (PHSC-AS) equation of state for poly(ethylene oxide) aqueous solutions.…”
Section: ■ Introductionmentioning
confidence: 99%
“…3.4 -Diagrama de fases para hidrato de metano. A região sombreada compreende a região onde forma-se a fase hidrato(NAKAMURA et al, 2003) HERSLUND, 2013)…”
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“…O método fundamenta-se no uso de cartas que fornecem a pressão de formação de hidratos em função da temperatura e do "peso do gás" (em inglês, gas gravity), que fornece a massa molecular do gás relativa a uma molécula de ar.Além deste método, há ainda o "K-value method", que assume uma solução ideal para os constituintes da fase gasosa para a fase hidrato sólida. Esta abordagem aplica-se com boa precisão para gases leves presentes no gás natural(HERSLUND, 2013). Entretanto, devido a sua base estritamente empírica, estas "cartas" podem fornecer erros significativos para condições que extrapolam os pontos usados na…”
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