Stability Limit Determination for Pure Compounds

Babalola, F. U.; Susu, Alfred A.

doi:10.1080/15567030701776783

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…This was demonstrated mathematically for pure and binary systems by Model and Reid [26] and validated using the experimental works of Skipov and Ermakov [27]. These works were very closely matched by the work of Babalola and Susu [16] The EOS model developed in this work is an extension of this Helmholtz energy stability criterion approach to multicomponent multiphase systems. There are strong theoretical indications that accurate stability analyses can be more easily achieved by models based on Helholtz energy criterion than those based on Gibbs energy stability criterion [26].…”

Section: Figure 1 Stability Limit Curves For Well-1supporting

confidence: 65%

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Model Development of a Suitable Equation of State for Multicomponent Multiphase Systems: Application to Crude Oil Phase Stability Requirements

Babalola

Susu

2018

International Journal of Thermodynamics

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Stability testing to determine whether or not a phase is stable is a necessary preliminary step for equilibrium calculations as well as a useful object of decision for design and management of reservoir operations. A suitable, and rodost Equation of State (EOS) model has been developed to achieve this for a reservoir fluid system over a wide range of pressure conditions. This was done by incorporating the variable parameter 'a' approach (VPAA), which treats the attractive parameter as a variable regressed by two straight lines, into the Helmholtz stability criterion. The EOS model was tested on three oil wells with high, medium and low parameter 'b' values to predict phase stability status of the fluids over a wide range of pressure conditions. For Well-1, the vapor phase was unstable while the liquid phase was stable at 47.4 atm. For Well-2, the vapor phase was stable at 209 atm. while the liquid phase was unstable For Well-3 however, the vapor phase was stable at 45.7 atm. while two liquid phases were identified. The lighter one was unstable at the temperature of interest, while the heavier one was stable at 115.9 atm

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Section: Figure 1 Stability Limit Curves For Well-1supporting

confidence: 65%

“…In the works of Babalola and Susu [16], as well as Knudsen et al [17], the Peng-Robinson Equation of State (which is cubic) was used to develop a model for predicting the stability limit of a pure system. This was found appropriate for representative paraffinic, naphthenic and aromatic compounds.…”

Section: The Search For Reliable Eos Modelsmentioning

confidence: 99%

Model Development of a Suitable Equation of State for Multicomponent Multiphase Systems: Application to Crude Oil Phase Stability Requirements

Babalola

Susu

2018

International Journal of Thermodynamics

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“…This was demonstrated mathematically for pure and binary systems by Modell and Reid [15] and validated using the experimental works of Skripov and Ermakov [17]. The model equations used here were developed and first applied by Babalola and Susu [5] to pure n-hexane giving a near-perfect match to the results obtained mathematically by Modell and Reid [15], and that obtained experimentally by Skripov and Ermakov [17].…”

Section: Resultsmentioning

confidence: 53%

“…Equations (5) and (6) can be solved simultaneously to eliminate one of the set of variables (P, V, T) to determine the limit of stability. Alternatively, this can be accomplished by the intersection of the stability curve and the isotherm when displayed on the same graph for the determination of the limit of stability for the pure material at a given temperature.…”

Section: Model For Pure Systemsmentioning

confidence: 99%

Determination of limit of stability profiles for liquefied natural gas: a thermodynamic approach

Babalola

Ogunkoya

2018

Appl Petrochem Res

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Efficient design, operation, handling, and transportation of natural gas as liquefied natural gas (LNG) are controlled by its phase behavior. A phase, in a non-reacting system, is known to be stable when it is at its lowest Gibbs energy; an alternative criterion to the minimization of the Gibbs energy is presented for phase stability status determination of pure systems and mixtures. On this premise, the stability limit determination method by the Helmholtz stability criterion was employed for the determination of stability limits which were used to successfully generate stability limit profiles for LNG and its constituents. To further investigate the metastable region, a new and robust model was developed and successfully used to produce vapor and liquid spinodals as well as binodal curves for the LNG constituents. The model accurately predicted the critical points and was shown to be in very close agreement with the available predicted and experimental results.

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Stability Limit Trend for Cyclohexane as a Representative Naphthenic Compound

Babalola

Susu

2009

Petroleum Science and Technology

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Stability Limit Determination for Pure Compounds

Cited by 3 publications

References 13 publications

Model Development of a Suitable Equation of State for Multicomponent Multiphase Systems: Application to Crude Oil Phase Stability Requirements

Model Development of a Suitable Equation of State for Multicomponent Multiphase Systems: Application to Crude Oil Phase Stability Requirements

Determination of limit of stability profiles for liquefied natural gas: a thermodynamic approach

Stability Limit Trend for Cyclohexane as a Representative Naphthenic Compound

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