Some observations regarding the prediction of isochoric heat capacities by engineering EOS models

被引：6

作者：

Polishuk, Ilya ^{[1
]}

Wisniak, Jaime ^{[2
]}

Segura, Hugo ^{[3
]}

机构：

[1] Univ Ctr Ariel, Dept Chem Engn & Biotechnol, IL-40700 Ariel, Israel

[2] Ben Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, Israel

[3] Univ Concepcion, Dept Ingn Quim, Concepcion, Chile

来源：

FLUID PHASE EQUILIBRIA | 2009年 / 277卷 / 02期

关键词：

EOS; Isochoric heat capacity; Dieterici model; Association part; EQUATION-OF-STATE; ACCURATE DIRECT TECHNIQUE; THERMODYNAMIC DERIVATIVE PROPERTIES; GENERALIZED CROSSOVER DESCRIPTION; PARAMETERIZING CUBIC EQUATIONS; TECHNICAL APPLICATIONS; PURE FLUIDS; TRANSPORT-PROPERTIES; POLAR FLUIDS; PRESSURES;

D O I：

10.1016/j.fluid.2008.11.017

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This Study evaluates the accuracy of different analytical EOS models in predicting isochoric heat capacity experimental data, a subject that has not received major attention so far, Contributions of the temperature dependency for the cohesive parameter, the Dieterid's and the expression derived for the description of association empirically attached to a generalized van der Waals-like equation, have been considered. It has been found that the temperature dependency of the cohesive parameter may improve the performance of the model at low temperatures and the expression derived for the description of association may qualitatively improve the description of the trend of the data near the critical temperature. None of the analyzed models can describe the behavior of the data at very high pressures. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：121 / 125

页数：5

共 29 条

[1] SELF-CONSISTENT EQUATIONS FOR CALCULATING THE IDEAL-GAS HEAT-CAPACITY, ENTHALPY, AND ENTROPY [J].

ALY, FA ;

LEE, LL .

FLUID PHASE EQUILIBRIA, 1981, 6 (3-4) :169-179

[2] EQUATION-OF-STATE METHODS FOR THE MODELING OF PHASE-EQUILIBRIA [J].

ANDERKO, A .

FLUID PHASE EQUILIBRIA, 1990, 61 (1-2) :145-225

[3] Remarks on publications dealing with equations of state [J].

Deiters, UK .

FLUID PHASE EQUILIBRIA, 1999, 161 (01) :205-205

[4] Generalized crossover description of the thermodynamic and transport properties in pure fluids II. Revision and modifications [J].

Kiselev, S. B. ;

Ely, J. F. .

FLUID PHASE EQUILIBRIA, 2007, 252 (1-2) :57-65

[5] Generalized crossover description of the thermodynamic and transport properties in pure fluids [J].

Kiselev, SB ;

Ely, JF .

FLUID PHASE EQUILIBRIA, 2004, 222 :149-159

[6] An equation of state for associating fluids [J].

Kontogeorgis, GM ;

Voutsas, EC ;

Yakoumis, IV ;

Tassios, DP .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1996, 35 (11) :4310-4318

[7] An accurate direct technique for parametrizing cubic equations of state -: Part III.: Application of a crossover treatment [J].

Llovell, F. ;

Vega, L. F. ;

Seiltgens, D. ;

Mejia, A. ;

Segura, H. .

FLUID PHASE EQUILIBRIA, 2008, 264 (1-2) :201-210

[8] Second-order thermodynamic derivative properties of selected mixtures by the soft-SAFT equation of state [J].

Llovell, F. ;

Peters, C. J. ;

Vega, L. F. .

FLUID PHASE EQUILIBRIA, 2006, 248 (02) :115-122

[9] Prediction of thermodynamic derivative properties of pure fluids through the soft-SAFT equation of state [J].

Llovell, Felix ;

Vega, Lourdes F. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (23) :11427-11437

[10] Surface tension of chain molecules through a combination of the gradient theory with the CPA EoS [J].

Oliveira, M. B. ;

Marrucho, I. M. ;

Coutinho, J. A. P. ;

Queimada, A. J. .

FLUID PHASE EQUILIBRIA, 2008, 267 (01) :83-91

← 1 2 3 →