High pressure viscosity modeling of pure alcohols based on classical and advanced equations of state

Parvaneh, Khalil; Haghbakhsh, Reza; Rahimpour, Mohammad Reza

doi:10.1016/j.jtice.2015.05.040

Cited by 22 publications

(36 citation statements)

References 54 publications

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“…In application of free volume theory, the largest error is observed in the case of ethylene glycol viscosity. In the work of Parvaneh et al, 6.32% error for 38 data points was reported for the calculation of ethylene glycol viscosity by using CPA + SRK EoS. Improved results in this study for this case are observed in Table .…”

Section: Resultssupporting

confidence: 44%

“…Improved results in this study for this case are observed in Table . In almost all the cases, obtained errors in this study are less than those presented by Parvaneh et al In addition, more data points were utilized in the correlation of data in this study. Such discrepancies in the reported errors could be due to differences in the applied form of the association term in the CPA EoS and in the optimization method.…”

Section: Resultsmentioning

confidence: 55%

“…Hitherto, various theoretical models for viscosity modeling have been presented in the literature, among which free volume and friction theories are the most attractive ones due to their strength, simplicity, and accuracy. However, other models based on the Eyring theory, PR‐type equation, hard‐sphere theory, and the Lennard–Jones potential are available in the literature.…”

Section: Theorymentioning

confidence: 99%

“…Therefore, the CPA EoS is applicable for the evaluation of physical properties of associating fluids. Hitherto, different researchers have applied the CPA EoS for the evaluation of volumetric properties of various systems such as alcohols, organic acids, amines, glycols, water‐containing mixtures, glycerol‐containing mixtures, and viscosity of alcohols . Some extensions and modifications of CPA could be found in the literature .…”

Section: Introductionmentioning

confidence: 99%

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Esmaeilzadeh–Roshanfekr equation of state coupled with CPA model: Application in viscosity modeling

Bakhtyari

Makarem

Esmaeilzadeh

2017

Asia-Pacific J Chem Eng

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The present study aims to evaluate the performance of the cubic plus association model for the estimation of physical properties of associating fluids. In this regard, this model with different physical terms was evaluated. Soave-Redlich-Kwong, Peng-Robinson, Patel-Teja, and Esmaeilzadeh-Roshanfekr cubic equations were utilized as the physical contribution in the model. This was the first study to evaluate 3-parameter equations such as Patel-Teja and Esmaeilzadeh-Roshanfekr. Experimental vapor pressure and saturated liquid molar densities were employed to obtain the parameters of pure components. All the models were capable of representing the data. However, new cubic plus association equations of states showed better performance due to the presence of an additional fitting parameter. These parameters were then used to calculate liquid viscosity data of associating fluids in a broad range of temperature and pressure.Free volume and friction theories were applied for this purpose. All the models were successful in estimation of viscosity data. However, friction models managed to obtain less error. Maximum observed error, which was less than 5%, was obtained in estimation of ethylene glycol viscosity by the free volume theory. Consequently, cubic plus association models with different physical terms can precisely estimate physical properties of highly associating fluids. Besides, the application of 3-parameter equations for the physical contribution leads to better estimations in both saturated liquid densities and liquid viscosities.

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Section: Resultssupporting

confidence: 44%

Section: Resultsmentioning

confidence: 55%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Esmaeilzadeh–Roshanfekr equation of state coupled with CPA model: Application in viscosity modeling

Bakhtyari

Makarem

Esmaeilzadeh

2017

Asia-Pacific J Chem Eng

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“…In Equation (12),

is the fraction of A -sites of molecule j that are not bonded to other substances. This parameter is calculated using Equations (15) and (16) [ 43 , 44 , 45 ].

and

where

is the association strength,

is the association energy, and

is the association volume parameter of the interactions between sites A j and B i .…”

Section: Methodsmentioning

confidence: 99%

Energy Conservation in Absorption Refrigeration Cycles Using DES as a New Generation of Green Absorbents

Haghbakhsh

Peyrovedin

Raeissi

et al. 2020

Entropy

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Deep eutectic solvents (DESs) are emerging green solvents with very unique characteristics. Their contribution to atmospheric pollution is negligible, and they can be “designed” for desired properties. In this study, the feasibility of applying DESs (Reline, Ethaline, or Glyceline) as absorbents in absorption refrigeration cycles was investigated. The sophisticated cubic-plus-association (CPA) equation of state, considering the strong intermolecular interactions of such complex systems, was used to estimate the thermodynamic properties. At a fixed set of base case operating conditions, the coefficients of performance were calculated to be 0.705, 0.713, and 0.716 for Reline/water, Ethaline/water, and Glyceline/water systems, respectively, while the corresponding mass flow rate ratios were 33.73, 11.53, and 16.06, respectively. Furthermore, the optimum operating conditions of each system were estimated. To verify the feasibility, results were compared to literature systems, including LiBr/water and various ionic liquid/water systems. The results indicate that DES/water working fluids have the potential to be used in such cycles. Since DESs have the characteristic to be tuned (designed) to desired properties, including their solvent power and their enthalpies of absorption, much further research needs to be done to propose new DESs with higher energy efficiencies.

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A New Mathematical Model for the Characterization of Viscosity Variations in the Aqueous Solutions of Monoalcohols and Polyalcohols

et al. 2023

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This study aims to investigate the viscosity of binary mixtures of water with different monoalcohols and polyalcohols. The viscosity values of the mixtures of methanol, ethanol, 1-propanol, and 2-propanol were taken from a study published by Herraez and Belda (2004). The values for ethylene glycol, glycerin, and sorbitol were measured using a similar protocol. The viscosity of the mixture is expressed as a function of the molar fraction of the alcohols that ranges from 0 (pure solvent, water in this case) to 1 (pure solute). To represent the viscosity of these mixtures, a new variable, Φ, was introduced. This representation provides a function, η = f(Φ), that has an exponential nature, with which excellent correlation coefficients are achieved with only one coefficient for monoalcohols or two coefficients for polyalcohols. Additionally, the variable Φ highlights the possible critical points, where physicochemical interactions occur between the components of the mixture.

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High pressure viscosity modeling of pure alcohols based on classical and advanced equations of state

Cited by 22 publications

References 54 publications

Esmaeilzadeh–Roshanfekr equation of state coupled with CPA model: Application in viscosity modeling

Esmaeilzadeh–Roshanfekr equation of state coupled with CPA model: Application in viscosity modeling

Energy Conservation in Absorption Refrigeration Cycles Using DES as a New Generation of Green Absorbents

A New Mathematical Model for the Characterization of Viscosity Variations in the Aqueous Solutions of Monoalcohols and Polyalcohols

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