Ali Rasoolzadeh , Alireza Shariati , Cor J. Peters
{"title":"Ethane solubility in triethylene glycol from an experimental and modeling perspective","authors":"Ali Rasoolzadeh , Alireza Shariati , Cor J. Peters","doi":"10.1016/j.fluid.2025.114331","DOIUrl":null,"url":null,"abstract":"<div><div>The downstream units of the gas refinery could be impacted by even a small amount of water. In the gas dehydration unit, one of the methods used to extract water from water-saturated gas is the absorption of water with the glycol solutions. The key selection criterion for choosing the best solvent in the gas dehydration unit is while absorbing maximum amounts of water, does not tend to absorb other natural gas components like light hydrocarbons. Triethylene glycol (TEG) is a widely used solvent in the gas dehydration process. TEG has the potential to co-absorb various gas components, such as CO<sub>2</sub>, methane, ethane, propane, and others, in addition to water from the gas stream. As a result, the proportions of gas components absorbed in TEG are crucial for optimizing glycol units, creating ideal regeneration environments, recovering energy, and saving money. In this contribution, the solubility of ethane in TEG was experimentally measured using the Cailletet apparatus, which operates based on the synthetic method. The ethane mole fraction range, the pressure range, and the temperature range are (0.0364 to 0.1263), (2.20 to 12.84) MPa, and (343.15 to 458.37) K, respectively. Additionally, a number of thermodynamic packages were utilized to determine the solubility of ethane in TEG. The findings showed that the van der Waals (vdW) mixing rules with the temperature-dependent parameter and the Wong-Sandler (WS) mixing rules combined with the Peng-Robinson (PR) equation of state (EoS) gave more accurate results with the average absolute deviation (AAD) in calculated pressures of 0.17 MPa and 0.18 MPa, respectively.</div></div>","PeriodicalId":12170,"journal":{"name":"Fluid Phase Equilibria","volume":"592 ","pages":"Article 114331"},"PeriodicalIF":2.8000,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fluid Phase Equilibria","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378381225000020","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The downstream units of the gas refinery could be impacted by even a small amount of water. In the gas dehydration unit, one of the methods used to extract water from water-saturated gas is the absorption of water with the glycol solutions. The key selection criterion for choosing the best solvent in the gas dehydration unit is while absorbing maximum amounts of water, does not tend to absorb other natural gas components like light hydrocarbons. Triethylene glycol (TEG) is a widely used solvent in the gas dehydration process. TEG has the potential to co-absorb various gas components, such as CO2, methane, ethane, propane, and others, in addition to water from the gas stream. As a result, the proportions of gas components absorbed in TEG are crucial for optimizing glycol units, creating ideal regeneration environments, recovering energy, and saving money. In this contribution, the solubility of ethane in TEG was experimentally measured using the Cailletet apparatus, which operates based on the synthetic method. The ethane mole fraction range, the pressure range, and the temperature range are (0.0364 to 0.1263), (2.20 to 12.84) MPa, and (343.15 to 458.37) K, respectively. Additionally, a number of thermodynamic packages were utilized to determine the solubility of ethane in TEG. The findings showed that the van der Waals (vdW) mixing rules with the temperature-dependent parameter and the Wong-Sandler (WS) mixing rules combined with the Peng-Robinson (PR) equation of state (EoS) gave more accurate results with the average absolute deviation (AAD) in calculated pressures of 0.17 MPa and 0.18 MPa, respectively.
期刊介绍：
Fluid Phase Equilibria publishes high-quality papers dealing with experimental, theoretical, and applied research related to equilibrium and transport properties of fluids, solids, and interfaces. Subjects of interest include physical/phase and chemical equilibria; equilibrium and nonequilibrium thermophysical properties; fundamental thermodynamic relations; and stability. The systems central to the journal include pure substances and mixtures of organic and inorganic materials, including polymers, biochemicals, and surfactants with sufficient characterization of composition and purity for the results to be reproduced. Alloys are of interest only when thermodynamic studies are included, purely material studies will not be considered. In all cases, authors are expected to provide physical or chemical interpretations of the results.
Experimental research can include measurements under all conditions of temperature, pressure, and composition, including critical and supercritical. Measurements are to be associated with systems and conditions of fundamental or applied interest, and may not be only a collection of routine data, such as physical property or solubility measurements at limited pressures and temperatures close to ambient, or surfactant studies focussed strictly on micellisation or micelle structure. Papers reporting common data must be accompanied by new physical insights and/or contemporary or new theory or techniques.
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