Fluid Phase Equilibria最新文献

{"title":"Bubble point pressure measurement and prediction of VLE and VLLE for dimethyl ether - 2-butoxyethanol and dimethyl ether - water - 2-butoxyethanol at (293.15 to 313.15) K","authors":"Tomoya Tsuji ,&nbsp;Masaki Okada ,&nbsp;Aoi Enokido ,&nbsp;Taka-aki Hoshina","doi":"10.1016/j.fluid.2024.114320","DOIUrl":"10.1016/j.fluid.2024.114320","url":null,"abstract":"<div><div>Bubble point pressure was measured for a binary, dimethyl ether – 2-butoxyethanol, and a ternary, dimethyl ether – water – 2-butoxyethanol, by use of a static apparatus with a glass cell up to 837.0 kPa at (293.15 to 313.15) K. The mole ratios of water: 2-butoxyethanol were set to 50.0:50.0, 90.0: 10.0 and 95.0: 5.0 in the liquid phase for the ternaries. The phase behavior was visually observed through the glass cell at the pressure measurements, because the vapor-liquid-liquid equilibria (VLLE) have been reported for dimethyl ether -water. The binary showed the vapor-liquid equilibrium (VLE), which almost followed an ideal solution. 2-Butoxyethanol enhanced the miscibility range for dimethyl ether – water. Only the VLE was observed in the two ternaries with water: 2-butoxyethanol = 50.0: 50.0 and 90.0:10.0. The VLLE was partly observed in the ternary with water: 2-butoxyethanol = 95.0: 5.0. The NRTL equation was employed to correlate the VLE and the VLLE not only for dimethyl ether – 2-butoxyethanol but also for the other constituent binaries, dimethyl ether - water and water – 2-butoxyethanol. The NRTL equation provided good reproducibilities for dimethyl ether - 2-butoxyethanol with the average value of the absolute relative deviations (AARDs) of 0.90 % for the pressure. Using the parameters fitted with the constituent three binary data, the AARDs were 5.04 %, 6.80 % and 12.21 % for the pressure of dimethyl ether – water – 2-butoxyethanol with water: 2-butoxyethanol = 50.0: 50.0, 90.0: 10.0 and 95.0: 5.0, respectively. The experimental data and the prediction will contribute to design the sprays using water-based solvents for color paints, disinfectants, cleaning agents, cosmetics, pharmaceuticals and so on.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"592 ","pages":"Article 114320"},"PeriodicalIF":2.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143154557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characteristic curves of the stockmayer fluid: Molecular simulation and equation of state modeling","authors":"Jens Staubach,&nbsp;Simon Stephan","doi":"10.1016/j.fluid.2024.114314","DOIUrl":"10.1016/j.fluid.2024.114314","url":null,"abstract":"<div><div>Molecular-based equation of state (EOS) models are an important tool for modeling thermophysical properties of fluids. Many fluids exhibit dipolar interactions for which Helmholtz energy models have been developed. The extrapolation behavior of these dipole contributions is critical for the extrapolation behavior of the total EOS model. In this work, nine dipole contribution models from the literature were examined regarding their performance on Brown’s characteristic curves. The zero-density limit of Brown’s curves are directly related to the second virial coefficients. Therefore, also the second virial coefficient was evaluated. The evaluation of the dipole contribution models was carried out using the Stockmayer model fluid. Therefore, all considered dipole contribution models were combined with an accurate Lennard-Jones EOS. Molecular simulations were used for determining reference data for the characteristic curves. Important differences are obtained for the extrapolation behavior of the different dipole contribution models. For low dipole moments, all studied dipole contribution models yield correct characteristic curves. With increasing dipole moment, some dipole contribution models yield unphysical artifacts.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"592 ","pages":"Article 114314"},"PeriodicalIF":2.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution and selectivity of Thiophene in ternary mixtures of {n-octane/n-hexadecane + Thiophene + acetonitrile / DMF} at 308.15K and atmospheric pressure","authors":"Nonhlanhla Gugu Mguni ,&nbsp;Marcin Hubert Durski ,&nbsp;Paramespri Naidoo ,&nbsp;Kuveneshan Moodley ,&nbsp;Deresh Ramjugernath","doi":"10.1016/j.fluid.2024.114317","DOIUrl":"10.1016/j.fluid.2024.114317","url":null,"abstract":"<div><div>The removal of thiophenic sulphur constitutes ongoing research into the desulphurisation of fuels to comply with emission requirements and cleaner production. For the determination of effective solvents, this work considered and compared acetonitrile and N,N-Dimethylformamide (DMF) in the separation of thiophene from model fuels, which in this case was characterised by using n-octane and n-hexadecane. Ternary liquid-liquid equilibria (LLE) data were measured for four ternary systems, namely, {n-octane/n-hexadecane + thiophene + acetonitrile/DMF} at 308.15 K and atmospheric pressure. The NRTL equation was applied in the thermodynamic modelling, and consistency checks were executed using the maximum likelihood method on Aspen Plus® Version 12. The measured data was consistent with the calculated binary interactions with an average root mean square deviation (RMSD) of 0.001 and showed that all systems portrayed type I LLE behaviour. It was observed that DMF presents improved distribution ratios and selectivities to thiophene from the model fuels n-octane and n-hexadecane compared to acetonitrile.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"592 ","pages":"Article 114317"},"PeriodicalIF":2.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase equilibrium measurements and thermodynamic modeling of CO2 + guaiacol, CO2 + guaiacol and ethanol, and CO2 + guaiacol, ethanol, and water","authors":"Paulo B. Cleto,&nbsp;Victor G. Durau,&nbsp;Luis R.S. Kanda,&nbsp;Marcos L. Corazza","doi":"10.1016/j.fluid.2024.114319","DOIUrl":"10.1016/j.fluid.2024.114319","url":null,"abstract":"<div><div>This work reports phase equilibrium measurements for the systems CO₂ + guaiacol, CO₂ + guaiacol + ethanol, and CO₂ + guaiacol + ethanol + water, which are related to the lignocellulosic biomass processing with supercritical CO₂ as solvent. Measurements at constant compositions were carried out in a high-pressure variable-volume view cell at temperatures ranging from 303 to 343 K. CO₂ molar fraction ranged from 0.3989 to 0.9695 in the CO₂ + guaiacol system, from 0.5024 to 0.8492 for the CO₂ + guaiacol + ethanol system, at three different ethanol to guaiacol molar ratios (1:1, 2:1 and 3:1), and from 0.4084 to 0.8997 for CO₂ + guaiacol + ethanol + water, at a fixed ratio guaiacol:ethanol:water (1:3:1). Under these conditions, vapor-liquid (VL), liquid-liquid (LL), and vapor-liquid-liquid (VLL) phase transitions were detected depending on the system and composition evaluated, where bubble point (BP) and dew point (DP) transitions were observed. In the ternary system, the presence of ethanol as a cosolvent led to a decrease in the phase transition pressure compared to the binary system. Conversely, in the quaternary system, the inclusion of water resulted in an increase in the transition pressures compared to the ternary system due to the hydrophobic interaction between CO₂ and water. The experimental data were modeled using Peng-Robinson equation of state and the quadratic van der Waals mixing rule (vdW2), and this applied thermodynamic model was capable of correlating and describing the phase behavior of these systems satisfactorily. The findings of this study are crucial for understanding and determining the phase behavior of systems involving CO₂, guaiacol, ethanol, and water and can be helpful in the development of new processes for producing valuable compounds from lignocellulosic biomass.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"591 ","pages":"Article 114319"},"PeriodicalIF":2.8,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"P-ρ-T measurements and derived properties of series dimethyl – and diethyl phosphate – based ionic liquids","authors":"Marta Królikowska ,&nbsp;Mikołaj Więckowski ,&nbsp;Michał Skonieczny","doi":"10.1016/j.fluid.2024.114313","DOIUrl":"10.1016/j.fluid.2024.114313","url":null,"abstract":"<div><div>Densities of the following pure ionic liquids: 1,3-dimethyl-imidazolium dimethyl phosphate, [C₁C₁IM][DMP], 1-ethyl-3-methylimidazolium diethyl phosphate, [C₁C₂IM][DEP], 4-ethyl-4-methylmorpholinium dimethyl phosphate, [C₁C₂MOR][DMP], 4-ethyl-4-methylmorpholinium diethyl phosphate, [C₁C₂MOR][DEP], 1-ethyl-1-methylpyrrolidinium diethyl phosphate, [C₁C₂PYR][DEP], 1-(2-hydroxyethyl)-1-methylpyrrolidinium dimethyl phosphate, [C₁C_2OHPYR][DMP] and 1-ethyl-1-methylpiperidinium dimethyl phosphate, [C₁C₂PIP][DMP] have been determined using a vibrating tube densimeter. Measurements have been done over the temperature range from <em>T</em> = (298.15 to 348.15) K and pressure <em>p</em> = (0.1 to 40) MPa. The densities at ambient and high pressures are measured to present the physicochemical properties of the ILs proposed as an absorbent in absorption refrigeration technology. The Tait equation with the temperature-dependent parameters has been used to correlate the experimental density values. The correlation equation has been used to compute isothermal compressibilities (α) and isobaric expansivities (κ).</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"591 ","pages":"Article 114313"},"PeriodicalIF":2.8,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vapour pressure osmometry and liquid density data for binary aqueous solutions of organic salts: Measurement and modelling","authors":"Pedro Velho ,&nbsp;Gonçalo Perestrelo ,&nbsp;Eduardo Sousa ,&nbsp;Eugénia A. Macedo","doi":"10.1016/j.fluid.2024.114318","DOIUrl":"10.1016/j.fluid.2024.114318","url":null,"abstract":"<div><div>In this work, considering the need for accurate thermophysical data to achieve a reliable thermodynamic description of electrolyte-containing systems, liquid density (298.15 or 313.15 K) and vapour pressure osmometry (313.15 K) studies were conducted for binary aqueous solutions of the organic salts: sodium acetate (Na[Acet]), sodium formate (Na[Form]), sodium gluconate (Na[Glu]), sodium succinate (Na₂[Suc]) and potassium formate (K[Form]). Liquid densities <span><math><mrow><mo>(</mo><mi>ρ</mi><mo>)</mo></mrow></math></span> were found to be favoured by decreasing temperature and increasing salt molality, following the order Na[Acet] (1006.01–1099.51 kg·m^-3) &lt; Na[Form] (1008.13–1120.56 kg·m^-3) &lt; K[Form] (1007.73–1119.52 kg·m^-3) &lt; Na[Glu] (1009.57–1117.90 kg·m^-3) &lt; Na₂[Suc] (1005.43–1108.17 kg·m^-3) in the common composition range. This property was satisfactorily correlated with salt molality <span><math><mrow><mo>(</mo><mi>m</mi><mo>)</mo></mrow></math></span> using second-degree polynomials, obtaining low standard deviations <span><math><mrow><mo>(</mo><mn>0.4</mn><mo>&lt;</mo><msub><mi>σ</mi><mrow><mi>SD</mi></mrow></msub><mspace></mspace><mo>/</mo><mspace></mspace><mtext>kg</mtext><mo>·</mo><msup><mrow><mrow><mi>m</mi></mrow></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup><mo>&lt;</mo><mn>1.2</mn><mo>)</mo></mrow></math></span> and high determination coefficients <span><math><mrow><mo>(</mo><mn>0.9995</mn><mo>&lt;</mo><msup><mi>R</mi><mn>2</mn></msup><mo>&lt;</mo><mn>0.9999</mn><mo>)</mo></mrow></math></span>. Furthermore, vapour pressure osmometry (VPO) studies were carried out, at 313.15 K, for the same solutions, showing a significant reduction of vapour pressure at maximum concentration (Na[Acet]: 1.231 kPa; Na[Form]: 1.318 kPa; Na[Glu]: 0.450 kPa; Na₂[Suc]: 0.791 kPa; K[Form]: 1.187 kPa) and generally presenting osmotic coefficients <span><math><mrow><mo>(</mo><mi>ϕ</mi><mo>)</mo></mrow></math></span> below unity, which implied negative deviations from an ideal solution. Finally, the osmotic coefficients were successfully described using the Extended Pitzer Model of Archer (<span><math><mrow><mn>2.57</mn><mo>&lt;</mo><msub><mi>σ</mi><mrow><mi>SD</mi></mrow></msub><mo>·</mo><msup><mrow><mn>10</mn></mrow><mn>3</mn></msup><mo>&lt;</mo><mn>9.56</mn></mrow></math></span> and <span><math><mrow><mn>0.9368</mn><mo>&lt;</mo><msup><mi>R</mi><mn>2</mn></msup><mo>&lt;</mo><mn>0.9969</mn></mrow></math></span>), which was later applied in the estimation of mean molal activity coefficients <span><math><mrow><mo>(</mo><msub><mi>γ</mi><mo>±</mo></msub><mo>)</mo></mrow></math></span> and excess Gibbs free energies <span><math><mrow><mo>(</mo><msup><mi>G</mi><mi>E</mi></msup><mo>)</mo></mrow></math></span>.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"591 ","pages":"Article 114318"},"PeriodicalIF":2.8,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the dissociation conditions of methane hydrate in silty-clayey sediments","authors":"Chang Chen ,&nbsp;Yu Zhang ,&nbsp;Xiaosen Li ,&nbsp;Du Wang ,&nbsp;Zhaoyang Chen ,&nbsp;Fei Gao","doi":"10.1016/j.fluid.2024.114316","DOIUrl":"10.1016/j.fluid.2024.114316","url":null,"abstract":"<div><div>Natural gas hydrate is widely distributed in silty-clayey sediments, that occur largely in a highly dispersed state. However, the phase equilibria of methane hydrate in the presence of clay and how surface adsorption associated with clay particles affect natural gas hydrate thermodynamics and stability are not fully elucidated and warrant investigation. In this study, the dissociation conditions of methane hydrate in representative silty-clayey sediments (sand, montmorillonite and illite) with a water content of ∼20 % at different clay contents (10, 30, 50, 70 and 100 wt%) were measured using the multi-step heating method. The results indicated that montmorillonite has a greater dissociation temperature depression compared to illite. In the pure montmorillonite system, the temperature depression of methane hydrate is up to -2.24 K at a pressure of 11.69 MPa compared to pure water, however, that for illite is very small, less than -0.5 K. When the montmorillonite content decreases from 100 wt% to 70 wt%, the dissociation temperature of methane hydrate decreases significantly. As the montmorillonite content decreases below 50 wt%, the dissociation temperature of methane hydrate in silty-clayey sediments is almost the same as bulk hydrates, which due to the clay sediments is almost saturated with water. Furthermore, we introduce the Van Genuchten (VG) model to quantify the effect of clay content on water potential (matric suction) in unsaturated clays. Based on the classical van der Waals model, the VG model has successfully been applied to calculate methane hydrate phase equilibria in clay-bearing sediments, with a maximum absolute deviation (AADP) &lt;5 %. It reveals that montmorillonite, characterized by its strong capacity for interlayer water absorption, shows an approximately exponential increase in matric suction as clay content rises. In contrast, the matrix suction of illite is weak, which can be approximately considered as a linear increase with the increase of clay content.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"591 ","pages":"Article 114316"},"PeriodicalIF":2.8,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamic insights into H2O-D2O separation via gas hydrate formation with HFC134a","authors":"Sai Kiran Burla,&nbsp;Seong Deok Seo,&nbsp;Jihoon Han,&nbsp;Ju Dong Lee","doi":"10.1016/j.fluid.2024.114312","DOIUrl":"10.1016/j.fluid.2024.114312","url":null,"abstract":"<div><div>This study investigates the thermodynamic phase behavior of mixed H₂O and D₂O systems using HFC134a gas hydrates, focusing on the potential for separating D₂O from H₂O. Hydrate formation and dissociation experiments were conducted on pure H₂O, D₂O, and their 50:50 vol% mixtures. Phase equilibrium data were obtained using the isochoric pressure-volume-temperature (PVT) method, and the Clausius-Clapeyron equation was applied to calculate dissociation enthalpies. The results revealed distinct differences in hydrate stability, with D₂O hydrates forming at lower pressures and higher temperatures than H₂O. The mixed system exhibited intermediate thermodynamic properties, reflecting the influence of both H₂O and D₂O within the hydrate. The dissociation enthalpy for H₂O+HFC134a is approximately 131.85 kJ/mol, while D₂O+HFC134a is about 167.28 kJ/mol. The dissociation enthalpy for the mixed hydrate is approximately 145.23 kJ/mol indicating an increase of about 10.14 % compared to H₂O+HFC134a and a decrease of approximately 13.18 % compared to D₂O+HFC134a. These findings highlight the potential for using HFC134a hydrates as an effective method for D₂O and H₂O separation, with future work aiming to explore their thermodynamic regimes and optimize experimental conditions for feasible separation.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"591 ","pages":"Article 114312"},"PeriodicalIF":2.8,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive modelling strategy for gas transport in polymers: Analysis of swelling and non-swelling agents at high pressures","authors":"Roberta Di Carlo ,&nbsp;Eleonora Ricci ,&nbsp;Matteo Minelli","doi":"10.1016/j.fluid.2024.114311","DOIUrl":"10.1016/j.fluid.2024.114311","url":null,"abstract":"<div><div>Gas transport in polymers is a process governed by the interplay between polymeric structure, gas properties, and operating conditions. This work analyzes the solubility and transport properties of different gases in five different industrially relevant polymeric systems, such as Matrimid/P84 polyimide blends, perfluorosulfonic acid membrane (PFSA) Nafion, as well as natural rubber (NR), silicone rubber (PDMS) and a fluorinated rubber (FKM), using a thermodynamic modeling framework, with focus on high-pressure conditions. Specifically, equations of state (EoS) and non-equilibrium thermodynamic for glassy polymers (NET-GP) approaches are able to describe gas solubility, and are combined to the Standard Transport Model (STM) to estimate diffusivity and permeability at various temperatures and pressures, with emphasis on the comparison of swelling and non-swelling penetrants, free-volume variations, and plasticization phenomena.</div><div>The results obtained reveal the ability of the models to describe the complex experimental behaviors, including challenging systems, such as glassy polymer blends or PFSA membranes. A thorough analysis of the gas transport and sorption properties in the different systems with the penetrant characteristics and with the polymer response to sorption is then performed to elucidate the prevailing effect shaping the behavior of the various systems. Therefore, the model proved to be a powerful tool to inspect the high-pressure induced changes in gas transport, and to predict the solubility and permeability properties in a wide range of conditions.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"591 ","pages":"Article 114311"},"PeriodicalIF":2.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-pressure phase equilibria in methane + pentadecane system: Experimental measurement and modeling with PengRobinson equation of state","authors":"Hugo Andersson Dantas Medeiros,&nbsp;Moacir Frutuoso Leal da Costa,&nbsp;Filipe Xavier Feitosa,&nbsp;Hosiberto Batista de Sant'Ana","doi":"10.1016/j.fluid.2024.114310","DOIUrl":"10.1016/j.fluid.2024.114310","url":null,"abstract":"<div><div>High-pressure vapor-liquid phase equilibria of the methane + pentadecane binary organic mixture were experimentally studied through nine (9) isopleth measurements at <em>T</em> = (299.45 – 374.45) K and pressures up to 60.00 MPa by a synthetic visual method using a variable-volume cell. Experimental data were compared with modeling results obtained from the Peng-Robinson equation of state. A single temperature-independent binary interaction parameter was also fitted to describe the experimental data better. The fluid phase equilibrium data obtained in this work helps us understand the behavior of the gas phase associated with crude oil and how excess gas influences the phase behavior of reservoir fluids. In addition, the data is crucial for modeling purposes and can be used to calibrate models, allowing them to describe more complex systems containing the components studied here more accurately.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"591 ","pages":"Article 114310"},"PeriodicalIF":2.8,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}