Experimental investigation and thermodynamic modeling of wax disappearance temperature for n-undecane+n-hexadecane+n-octadecane and n-tetradecane+n-hexadecane+n-octadecane ternary systems

Aftab, Saima; Javanmardi, Jafar; Nasrifar, Khashayar

doi:10.1016/j.fluid.2015.06.004

Cited by 11 publications

(18 citation statements)

References 42 publications

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“…This observation reflects the fact that increasing the weight fractions of the heavier components will cause an increase in the WDT. 11 This has been mentioned in Section 4.3 .…”

Section: Results and Discussionmentioning

confidence: 97%

“…This result is in line with the formerly published literature. 11 , 29 According to Table 2 , it can be observed that the most suitable sets of activity coefficient models that lead to the lowest deviation are the regular solution theory 19 and p.UNIQUAC model 24 for the liquid and solid phases, respectively. The reason is that the p.UNIQUAC model 24 is a modified version of the UNIQUAC 25 to calculate solid–liquid equilibria of alkanes and can accurately describe the nonidealities of the paraffinic solid solutions and can predict the phase behavior of complex hydrocarbon mixtures at low and high pressures.…”

Section: Results and Discussionmentioning

confidence: 99%

“…On the other hand, wax disappearance temperature (WDT) is a temperature wherein the last tiny particles of wax crystals break down in the liquid phase on heating and represents an actual equilibrium state, a point function property. 6 , 9 − 11 Several studies indicate that the difference between the measured WAT and WDT by one method can be considerable. 12 , 13 …”

Section: Introductionmentioning

confidence: 99%

“…They realized that when the carbon numbers of system components are consecutive, the SS model 19 is more accurate, and the MS model 21 predicts WAT lower than the actual value in general. Aftab et al 11 conducted some experiments to measure the WDTs of two different ternary systems containing n -C 11 + n -C 16 + n -C 18 and n -C 14 + n -C 16 + n -C 18 by a visual method. They also used two different SS models for thermodynamic modeling.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Measurement and Thermodynamic Modeling of the Wax Disappearance Temperature (WDT) for a Quaternary System of Normal Paraffins

et al. 2022

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Normal paraffin ( N -alkane)-based wax is well known as a severe problem in petroleum production, transportation, and processing. Implementing suitable solutions for wax-related problems requires vast technical knowledge and investigation of the wax disappearance temperature (WDT) of multicomponent systems in petroleum-dominated systems. In this study, the WDTs of a quaternary system comprising different mixtures of n -undecane + n -tetradecane + n -hexadecane + n -octadecane were measured using a visual-based diagnosis apparatus under atmospheric pressure. On the other hand, the WDTs of the studied systems are predicted by applying a solid solution model without any adjustable parameter. Two approaches namely γ–φ and γ–γ are assessed. In the (γ–φ) approach, perturbed-chain statistical associating fluid theory (PC-SAFT) is applied for liquid phase modeling, while the solid phase is described using different activity coefficient models. In the (γ–γ) approach, nonidealities of both the liquid and solid phases are investigated using different combinations of activity coefficient models such as ideal solution, regular solution theory, predictive Wilson, predictive UNIQUAC, and UNIFAC. Comparison of experimental data and thermodynamic modeling results indicates that applying the predictive UNIQUAC model for describing the nonideality of the solid phase and the regular solution model for the liquid phase is the best combination for the aforementioned system with the average absolute deviation (AAD) of 0.8 K.

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“…This observation reflects the fact that increasing the weight fractions of the heavier components will cause an increase in the WDT. 11 This has been mentioned in Section 4.3 .…”

Section: Results and Discussionmentioning

confidence: 97%

Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Measurement and Thermodynamic Modeling of the Wax Disappearance Temperature (WDT) for a Quaternary System of Normal Paraffins

et al. 2022

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“…The knowledge of wax formation phenomena has been improved both experimentally and theoretically . While literature is rich in reporting wax appearance temperature (WAT), scientists argue that wax disappearance temperature (WDT) is closer to the wax equilibrium condition .…”

Section: Introductionmentioning

confidence: 99%

Phase boundaries for synthetic light oils and gas condensate mixtures using predictive equations of state with a solid solution model

Nasrifar

Javanmardi

2018

Can J Chem Eng

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Phase boundaries for five synthetic paraffinic mixtures were predicted using a previously developed Gibbs energy minimization algorithm. In this method, the vapour and liquid phases were described by cubic equations of state (EoS). These EoS employed a predictive temperature-dependent group-contribution binary interaction parameter model. The solid phase was described using a universal quasi-chemical activity coefficient (UNIQUAC) solid solution model. Using this algorithm, the phase boundaries were calculated from a temperature-search strategy. The predicted phase boundaries were found to be in good agreement with experimental phase boundaries for vapour-liquid (VL), solid-liquid (SL), solid-vapour (SV), and solid-vapour-liquid (SVL) regions. The model was also used to predict the phase boundaries at low temperatures where no experimental data were available.

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An Investigation on Phase Behaviors of Wax Precipitation in Waxy Gas-Condensate Reservoir

Zhang,

Wang,

Zhao

et al. 2024

Springer Series in Geomechanics and Geoengineering

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Experimental investigation and thermodynamic modeling of wax disappearance temperature for n-undecane+n-hexadecane+n-octadecane and n-tetradecane+n-hexadecane+n-octadecane ternary systems

Cited by 11 publications

References 42 publications

Experimental Measurement and Thermodynamic Modeling of the Wax Disappearance Temperature (WDT) for a Quaternary System of Normal Paraffins

Experimental Measurement and Thermodynamic Modeling of the Wax Disappearance Temperature (WDT) for a Quaternary System of Normal Paraffins

Phase boundaries for synthetic light oils and gas condensate mixtures using predictive equations of state with a solid solution model

An Investigation on Phase Behaviors of Wax Precipitation in Waxy Gas-Condensate Reservoir

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