A new generalized equation for predicting volumes of compressed liquids

Chang, Chao Cheng; Zhao, Xingmin

doi:10.1016/0378-3812(90)85134-v

Cited by 27 publications

(15 citation statements)

References 15 publications

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“…In general, these models can be classified as equations of state [5][6] and empirically correlations [7][8]. For example, the HBT correlations of Chang et al [9] are conventional method of describing the density of n-alkanes. The narrow ranges of pressure and temperature conditions in the application of empirical correlations and separate density correlations for liquid or vapor phases are two main limitations of empirical correlations.…”

Section: Introductionmentioning

confidence: 99%

New Functionality for Energy Parameter of Redlich-Kwong Equation of State for Density Calculation of Pure Carbon Dioxide and Ethane in Liquid, Vapor and Supercritical Phases

Rostamian

Lotfollahi

2015

Period. Polytech. Chem. Eng.

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Section: Introductionmentioning

confidence: 99%

New Functionality for Energy Parameter of Redlich-Kwong Equation of State for Density Calculation of Pure Carbon Dioxide and Ethane in Liquid, Vapor and Supercritical Phases

Rostamian

Lotfollahi

2015

Period. Polytech. Chem. Eng.

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“…13 3.796 228 [10] n-Pentane 72.149 469.7 3.37 232 [11] n-Hexane 86.175 507.82 3.034 233.18 [11] n-Heptane 100.2 540. 13 2.736 232 [11] n-Octane 114.23 569.32 2.497 234.9 [11] n-Nonane 128.26 594.55 2.281 232.14 [12] n-Decane 142.28 617.7 2.103 233.34 [12] S1 also presents the comparisons of the experimental data with the calculated values from the new model, as well as four different density equations from the literature, that is, HBT, [2] CZ, [4] Aalto [7] and TS. [14] For HBT model, the calculations were performed at the T r values below 0.95, whereas TS model is limited to T r < 0.7 for C 4 -C 10 , CZ and Aalto equations are compared with the complete data sets.…”

Section: Resultsmentioning

confidence: 99%

“…However, the HBT model is limited to 0.25 < T r < 0.95. In 1990, Chang and Zhao proposed a new equation of compressed liquids, which was valid up to the critical point. The claimed accuracy is as good as the HBT model or even better.…”

Section: Introductionmentioning

confidence: 99%

A new semi‐empirical equation for compressed liquid densities of n‐alkanes

Sun

Wang

Liu

2012

Asia-Pacific J Chem Eng

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In this work, a new six‐parameter semi‐empirical equation has been developed for the predictions of the compressed liquid densities of n‐alkanes from C2 to C10. The resulting functional form was established with the quasi‐Newton optimization algorithm, which considers the experimental data sets for different fluids simultaneously. During the fitting process, the functional form of the equation is numerically very stable, and the substance‐specific coefficients can be obtained easily. The calculated values from the new model were compared with the available experimental data and the values from reference equations in the literature. In most cases, the deviations are not more than ±0.5% for temperatures up to 0.7 times the critical temperature, whereas the agreement is within ±1.0% in the temperature range from the triple point to the critical point at reduced pressure up to 15. It was shown that the new semi‐empirical equation was able to represent the compressed liquid densities of n‐alkanes in wide thermodynamic ranges. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.

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“…In conjunction with the above methods, studies are available in the literature +here experimental liquid viscosities are correlated using various empirical mathematical expressions 13,14 . Of these, the simplest 'and most practical form is the Andrade equation13 I given below.…”

Section: Introductionmentioning

confidence: 99%

“…sidered mixtures of compounds made of n and (n+l) fused rings, where n=l, for cuts 5,6,7; n=2 for cuts 8,9,10; n=3, for cuts 11,15; andn4, for cuts 12,13,16. The ratios of the four types of rings relative to each other are determined using the molecular weight of a single unfused ring of each type and the mass compositions of Table 3.…”

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confidence: 99%

Thermodynamic and rheological properties of solid-liquid systems in coal processing. Final technical report

Kabadi¹

1995

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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy. completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Refer-I ence herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. d l s c1 0 0 This report was prepared with the support of the U.S. Department of Energy, Grant Number DE-FG22-91PC91300. However, any opinions, findings, conclusions or recommendations expressed herein are those of the author and do not necessarily reflect the views of DOE.

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A new generalized equation for predicting volumes of compressed liquids

Cited by 27 publications

References 15 publications

New Functionality for Energy Parameter of Redlich-Kwong Equation of State for Density Calculation of Pure Carbon Dioxide and Ethane in Liquid, Vapor and Supercritical Phases

New Functionality for Energy Parameter of Redlich-Kwong Equation of State for Density Calculation of Pure Carbon Dioxide and Ethane in Liquid, Vapor and Supercritical Phases

A new semi‐empirical equation for compressed liquid densities of n‐alkanes

Thermodynamic and rheological properties of solid-liquid systems in coal processing. Final technical report

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