Dipak S. Sutar, Nilesh A. Mali* and Pravin D. Ghuge,
{"title":"Isobaric Vapor–Liquid-Equilibrium Data Measurement of Toluene with Ethyl Acetate, n-Propyl Acetate, Iso-propyl Acetate, Iso-butyl Acetate, and Iso-amyl Acetate: Experiments and Modeling","authors":"Dipak S. Sutar, Nilesh A. Mali* and Pravin D. Ghuge, ","doi":"10.1021/acs.jced.4c0062410.1021/acs.jced.4c00624","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00624https://doi.org/10.1021/acs.jced.4c00624","url":null,"abstract":"<p >The isobaric vapor–liquid equilibrium (VLE) data of the systems (ethyl acetate + toluene), (<i>n</i>-propyl acetate + toluene), (iso-propyl acetate + toluene), (toluene + iso-butyl acetate), and (toluene + iso-amyl acetate) were measured under the isobaric condition at 92 kPa using a glass dynamic recirculation apparatus. The experimental VLE data was correlated by NRTL, Wilson, and UNIQUAC activity coefficient models to account for the nonideality. The binary interaction parameters of the models were obtained by regressing the experimental data using the maximum likelihood objective function. The thermodynamic consistency of the experimental data was checked by using the Van Ness test and the infinite dilution test. Extrapolating the activity coefficient at infinite dilution was done by regressing the experimental data with an extended Redlich–Kister equation. The NRTL, Wilson, and UNIQUAC models exhibited a maximum root-mean-square deviation less than unity for temperature and vapor mole fraction. Additionally, it is worth noting that no azeotrope was identified in the VLE data in this study.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 4","pages":"1652–1663 1652–1663"},"PeriodicalIF":2.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806604","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":"Solid–Liquid Phase Equilibrium for the Quaternary System Na+, K+//VO3–, Cl––H2O at 298.15 K","authors":"Honglin Xu, Ruilin Wang*, Yongsheng Deng, Guofeng Dou and Xinyu Wang*, ","doi":"10.1021/acs.jced.4c0068910.1021/acs.jced.4c00689","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00689https://doi.org/10.1021/acs.jced.4c00689","url":null,"abstract":"<p >The stable phase equilibrium of the reciprocal quaternary system of Na<sup>+</sup>, K<sup>+</sup>//VO<sub>3</sub><sup>–</sup>, Cl<sup>–</sup>–H<sub>2</sub>O at 298.15 K was investigated by an isothermal solution equilibrium method. The equilibrium liquid phase solubility data and physical property data [density (ρ), refractive index (<i>n</i><sub>D</sub>), and pH] were determined, and the composition of the equilibrium solid phase was verified by X-ray diffraction. The phase diagram and physical property–composition diagrams were constructed based on the equilibrium solubility data and physical property data. The phase diagram contains three invariant points, seven isothermal univariant curves, and five crystalline phase regions. The study found that this quaternary system belongs to a complex system with the presence of the double salts. By comparing the experimental results with literature data, it was confirmed that at 298.15 K, the chemical formulas of the complex salt which formed by the quaternary system Na<sup>+</sup>, K<sup>+</sup>//VO<sub>3</sub><sup>–</sup>, Cl<sup>–</sup>–H<sub>2</sub>O were consistent with the complex salt chemical formula (Na<sub>2<i>m</i></sub>K<sub><i>n</i></sub>(VO<sub>3</sub>)<sub>2<i>m</i>+<i>n</i></sub>) proposed by the Druzynski group, thus verifying the reliability of this experiment. The results of this study will provide new experimental data for the thermodynamics of vanadium–water systems.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 4","pages":"1727–1736 1727–1736"},"PeriodicalIF":2.0,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806802","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}
Hemayat Shekaari, Mohammed Taghi Zafarani-Moattar*, Shima Ghasemzadeh, Elaheh Janbezar, Soheila Asadollahi, Behrang Golmohammadi and Fariba Ghaffari,
{"title":"Partitioning Behavior of Anti-Inflammatory Drugs Using Aqueous Two-Phase Systems Based on Green Betaine Ionic Liquids","authors":"Hemayat Shekaari, Mohammed Taghi Zafarani-Moattar*, Shima Ghasemzadeh, Elaheh Janbezar, Soheila Asadollahi, Behrang Golmohammadi and Fariba Ghaffari, ","doi":"10.1021/acs.jced.4c0065510.1021/acs.jced.4c00655","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00655https://doi.org/10.1021/acs.jced.4c00655","url":null,"abstract":"<p >Anti-inflammatory medications such as salicylic acid and acetaminophen are the most prescribed drugs in the world that could be found in the wastewater. Separation of these drugs from aqueous media has an economic and environmental impact. Recently, there has been considerable interest in utilizing aqueous two-phase systems (ATPSs) containing biocompatible ionic liquids (ILs) for the extraction of various substances due to their low cost and easy formation, while finding green materials to form these systems is challenging. Therefore, in this work, the phase diagram of novel ATPSs composed of two green betaine-based ILs, betaine hexyl ester bromide [BH]Br and betaine octyl ester bromide [BO]Br, and phosphate salts (K<sub>3</sub>PO<sub>4</sub> and K<sub>2</sub>HPO<sub>4</sub>) have been investigated at 298.15 K and atmospheric pressure (≈85 kPa). The experimental binodal data were correlated by using an empirical nonlinear three-parameter expression developed by Merchuk. Then, the Setschenow-type equation and NRTL model were employed to establish correlations for the tie-lines. Finally, in these ATPSs, the partition behavior of acetaminophen and salicylic acid was investigated by measuring the partition coefficient and extraction efficiency. The results showed that the selected drugs were successfully extracted into the IL-rich top phase of the studied ATPSs, with partition coefficients greater than one across different tie-lines.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 4","pages":"1674–1686 1674–1686"},"PeriodicalIF":2.0,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806801","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}
Francisco Javier Verónico-Sánchez, Benjamín Rosales-Guzmán*, Abel Zúñiga-Moreno, Ricardo García-Morales and Octavio Elizalde-Solis*,
{"title":"Solid–Liquid–Gas Phase Equilibrium for Binary Carbon Dioxide + Linear Alkane Systems: Experiments and Modeling","authors":"Francisco Javier Verónico-Sánchez, Benjamín Rosales-Guzmán*, Abel Zúñiga-Moreno, Ricardo García-Morales and Octavio Elizalde-Solis*, ","doi":"10.1021/acs.jced.4c0070310.1021/acs.jced.4c00703","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00703https://doi.org/10.1021/acs.jced.4c00703","url":null,"abstract":"<p >Supercritical fluids are widely used in various applications, and their effectiveness depends on understanding the phase equilibria involved in the processes. The aim of this work is to report the solid–liquid–gas (SLG) phase equilibrium for binary systems comprising carbon dioxide and a linear alkane. In this regard, the pressure–temperature SLG phase equilibrium was measured based on the enhanced first freezing point method from the freezing point of the alkane up to 37.87 MPa. The hydrocarbons studied were octadecane, eicosane, heneicosane, tricosane, tetracosane, hexacosane, dotriacontane, and hexatriacontane, whose freezing point temperatures ranged from 301 to 349.35 K. Relationships between alkane chain length and factors influencing the freezing point were identified. SLG modeling for the CO<sub>2</sub> + alkane systems was performed by the Peng–Robinson and Sanchez–Lacombe equations of state for the available data from octadecane to hexatriacontane. The correlated data agreed with our experimental data with average absolute deviations lower than 0.33%, with the Sanchez–Lacombe equation yielding the lowest deviation. Standard deviations of the parameters were calculated, and their impact on the modeling was discussed.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 4","pages":"1748–1758 1748–1758"},"PeriodicalIF":2.0,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806799","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}
Ruxue Yao, Yang Ge, Jiangtao Song, Fei Yuan*, Yafei Guo and Tianlong Deng*,
{"title":"Phase Equilibria and Phase Diagram of the Quaternary System (Na+, K+, Ca2+//Cl– -H2O) and Its Subsystems at 338.15 K","authors":"Ruxue Yao, Yang Ge, Jiangtao Song, Fei Yuan*, Yafei Guo and Tianlong Deng*, ","doi":"10.1021/acs.jced.4c0066010.1021/acs.jced.4c00660","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00660https://doi.org/10.1021/acs.jced.4c00660","url":null,"abstract":"<p >The Qaidam Basin has potassium- and calcium-rich oil field brine resources at high temperatures. Since the phase diagram is a powerful tool to guide the separation and purification of inorganic chemical engineering for the development of potassium resources in oil field brine, the quaternary oil field brine system (Na<sup>+</sup>, K<sup>+</sup>, Ca<sup>2+</sup>//Cl<sup>–</sup> -H<sub>2</sub>O) and its two subsystems ((Na<sup>+</sup>, Ca<sup>2+</sup>//Cl<sup>–</sup> -H<sub>2</sub>O) and (K<sup>+</sup>, Ca<sup>2+</sup>, //Cl<sup>–</sup> -H<sub>2</sub>O)) at 338.15 K were reported for the first time by the isothermal dissolution equilibrium method. The compositions of the equilibrium solid phases were analyzed and identified by combined chemical analyzing and X-ray diffraction. The quaternary system has four crystallized regions corresponding to NaCl, KCl, KCl·CaCl<sub>2</sub>, and CaCl<sub>2</sub>·2H<sub>2</sub>O at 338.15 K, and the incongruent double salt KCl·CaCl<sub>2</sub> occurred at 338.15 K. The study facilitates the enrichment of thermodynamic data and exploits brine-based potassium resources.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 4","pages":"1687–1692 1687–1692"},"PeriodicalIF":2.0,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806794","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}
Meiling Zhang, Qinqin Zhang*, Hua Xin and Zhigang Zhang*,
{"title":"Separation of Cyclohexane and Isopropanol Azeotropic System by Liquid–Liquid Extraction Using Imidazolium-Based Ionic Liquids with Different Anions and Mechanism Analysis","authors":"Meiling Zhang, Qinqin Zhang*, Hua Xin and Zhigang Zhang*, ","doi":"10.1021/acs.jced.4c0067610.1021/acs.jced.4c00676","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00676https://doi.org/10.1021/acs.jced.4c00676","url":null,"abstract":"<p >Cyclohexane (CYH) and isopropyl alcohol (IPA) are both excellent solvents and raw materials for industrial production. Mixtures of IPA and CYH are generated during the production of rapeseed oil. Since the two form an azeotrope at atmospheric pressure, they cannot be separated by simple distillation. Liquid–liquid extraction is an energy-saving and environmentally friendly azeotrope separation method. Ionic liquids (ILs) are ideal extractants to replace conventional extractants due to their designability and negligible vapor pressure. Three ILs, 1-ethyl-3-methylimidazolium trifluoroacetate ([EMIM][TFA]), 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][DEP]), and 1-ethyl-3-methylimidazolium dicyanamide ([EMIM][DCA]), were selected as the extractants to separate the mixture of IPA and CYH. The liquid–liquid equilibrium (LLE) data of the IPA + CYH + ILs systems were determined at 303.15 K and atmospheric pressure. The partition coefficient (β) and selectivity coefficient (S) were calculated to evaluate the extraction effect of the ILs. Othmer–Tobias, Bachman, and Hand equations were used to check the consistency of the experimental data. The experimental LLE data were correlated by the NRTL model in Aspen Plus V11 software. Finally, the separation mechanism of the three ILs was investigated by interaction energy analysis, σ-profile analysis, and RDG analysis.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 4","pages":"1693–1704 1693–1704"},"PeriodicalIF":2.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806792","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}
Wenyu Li, Kexin Ren, Hongyu He, Zhao Lei, Yuhang Chen, Maogang He and Ying Zhang*,
{"title":"Speed of Sound Measurements in Cyclopentane at Temperatures from (349 to 526) K and Pressures up to 10.0 MPa","authors":"Wenyu Li, Kexin Ren, Hongyu He, Zhao Lei, Yuhang Chen, Maogang He and Ying Zhang*, ","doi":"10.1021/acs.jced.4c0070010.1021/acs.jced.4c00700","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00700https://doi.org/10.1021/acs.jced.4c00700","url":null,"abstract":"<p >Cyclopentane is an excellent working fluid in high-temperature organic Rankine cycle (ORC) systems. Currently, experimental measurements of the speed of sound in cyclopentane at temperatures above 353 K are not available in the literature. In this study, the speed of sound in cyclopentane is measured by the Rayleigh–Brillouin scattering method. Using the existing experimental equipment, the data are measured along six isobaric lines from 2.0 to 10.0 MPa at a temperature range of 349.40 to 525.97 K. The expanded relative uncertainty of the speed of sound measured in this experiment can be estimated to be 0.86% with the confidence level of 0.95 (coverage factor <i>k</i> = 2). The average absolute relative deviation (AARD) between our experimental data and calculated values with the equation of state (EOS) proposed as mentioned in this paper in the liquid-phase region is 0.99%, which confirms the effectiveness of the experimental results and the accuracy of the EOS. Furthermore, the data on the speed of sound from experimental results and the literature for cyclopentane are also fitted into a correlation formula related to the temperature and pressure, facilitating engineering applications.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 4","pages":"1583–1589 1583–1589"},"PeriodicalIF":2.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806793","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":"Solid–Liquid Phase Equilibria of Quaternary System Na+, K+, Rb+//SO42––H2O at T = 298.2 and 323.2 K","authors":"Zhangfa Yu, Ying Zeng*, Hongbo Sun, Longgang Li, Wanghai He, Yu Chen and Xudong Yu, ","doi":"10.1021/acs.jced.4c0069610.1021/acs.jced.4c00696","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00696https://doi.org/10.1021/acs.jced.4c00696","url":null,"abstract":"<p >To explore the crystallization behavior of rubidium under conditions of multi-ion coexistence in the sulfate system and the influence of temperature changes, the solid–liquid equilibria of the quaternary system Na<sup>+</sup>, K<sup>+</sup>, and Rb<sup>+</sup>//SO<sub>4</sub><sup>2–</sup>–H<sub>2</sub>O at 298.2 and 323.2 K was studied using the isothermal dissolution equilibrium method. The results are as follows: the quaternary system Na<sup>+</sup>, K<sup>+</sup>, Rb<sup>+</sup>//SO<sub>4</sub><sup>2–</sup>–H<sub>2</sub>O is a complex system at both 298.2 and 323.2 K, with the formation of the solid solution [(K, Rb)<sub>2</sub>SO<sub>4</sub>] and the double salt Na<sub>2</sub>SO<sub>4</sub>·3K<sub>2</sub>SO<sub>4</sub>, where the crystal phase region of the double salt Na<sub>2</sub>SO<sub>4</sub>·3K<sub>2</sub>SO<sub>4</sub> is consistently the largest. Comparing these two phase diagrams at 298.2 and 323.2 K, it was found that the precipitation form of Na<sub>2</sub>SO<sub>4</sub> changes from Na<sub>2</sub>SO<sub>4</sub>·10H<sub>2</sub>O at 298.2 K to Na<sub>2</sub>SO<sub>4</sub> at 323.2 K. As the temperature increases, the phase regions of the double salt Na<sub>2</sub>SO<sub>4</sub>·3K<sub>2</sub>SO<sub>4</sub> and the solid solution [(K, Rb)<sub>2</sub>SO<sub>4</sub>] expand, while the precipitation phase regions of the single salts K<sub>2</sub>SO<sub>4</sub> and Rb<sub>2</sub>SO<sub>4</sub> decrease relatively. Therefore, this change can be utilized to separate rubidium and potassium sulfates through cooling crystallization in a sulfate system containing sodium, potassium, and magnesium.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 4","pages":"1737–1747 1737–1747"},"PeriodicalIF":2.0,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809905","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":"Solid–liquid Phase Equilibria and Volumetric Properties of Alkali Borates at 308.2, 323.2, and 348.2 K for Boron-Rich Brine","authors":"Ling-Xuan Wang, Shi-Hua Sang*, Hong-Pei Xie, Yu-Qiu Cen and Xiao-Feng Guo, ","doi":"10.1021/acs.jced.4c0060710.1021/acs.jced.4c00607","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00607https://doi.org/10.1021/acs.jced.4c00607","url":null,"abstract":"<p >The Zabuye Salt Lake of the Tibet Plateau in China is rich in lithium and boron resources. To optimize the comprehensive utilization of salt lake brine, the solid–liquid phase equilibria of the ternary system Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub>–Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>–H<sub>2</sub>O were determined at 308.2, 323.2, and 348.2 K using isothermal dissolution equilibrium method. The phase diagrams of the ternary system Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub>–Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>–H<sub>2</sub>O all contained one invariant point, two solubility curves, and two solid-phase crystallization regions without any solid solutions or complex salts. At 308.2 and 323.2 K, the corresponding equilibrium solid phases were Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub>·3H<sub>2</sub>O and Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>·10H<sub>2</sub>O, while at 348.2 K, they were Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub>·3H<sub>2</sub>O and Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>·5H<sub>2</sub>O. The solution density increases with higher Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub> and Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub> content, peaking at the invariant point. The unreported Pitzer model parameters (β<sub>MX</sub><sup>(0)</sup>, β<sub>MX</sub><sup>(1)</sup>, <i>C</i><sub>MX</sub><sup>ϕ</sup>, θ<sub>Li<sup>+</sup>,Na<sup>+</sup></sub>, Ψ<sub>Li<sup>+</sup>,Na<sup>+</sup>,B<sub>4</sub>O<sub>5</sub>(OH)<sub>4</sub><sup>2–</sup></sub>) and solubility products <i>K</i><sub>sp</sub> were obtained to model the phase equilibria. The unreported volume parameters (β<sup>(0),V</sup>, β<sup>(1),V</sup>, <i>C</i><sup>V</sup>, θ<sub>Li<sup>+</sup>,Na<sup>+</sup></sub><sup>V</sup>, Ψ<sub>Li<sup>+</sup>,Na<sup>+</sup>,B<sub>4</sub>O<sub>5</sub>(OH)<sub>4</sub><sup>2–</sup></sub><sup>V</sup>) were obtained to further study the thermodynamic volume properties in borate solution, and the related density, excess molar volume, and apparent molar volume were modeled in detail. This work is conducive to the comprehensive utilization of boron-rich salt lakes.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 4","pages":"1714–1726 1714–1726"},"PeriodicalIF":2.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809901","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}
Zihong Liu, Haiyuan Yao, Yan Li, Linhe Wang, Jiguang Wang, Yu Liu, Yongchen Song and Lunxiang Zhang*,
{"title":"Analysis of the Effect of Pipeline Inclination on Hydrate Growth Mechanisms","authors":"Zihong Liu, Haiyuan Yao, Yan Li, Linhe Wang, Jiguang Wang, Yu Liu, Yongchen Song and Lunxiang Zhang*, ","doi":"10.1021/acs.jced.4c0051610.1021/acs.jced.4c00516","DOIUrl":"https://doi.org/10.1021/acs.jced.4c00516https://doi.org/10.1021/acs.jced.4c00516","url":null,"abstract":"<p >Hydrate clogging has historically posed significant challenges to the exploitation of deep-sea oil and gas reserves. The complexity of the pipeline-laying environment, characterized by an intricate seabed topography, often results in sloping pipelines. In such configurations, gas–liquid two-phase flow can lead to segment plug flow, which accelerates hydrate formation and jeopardizes the safety of natural gas transmission pipelines. To enhance the safety of transportation systems, it is essential to investigate the influence of inclination angles on hydrate growth, thereby mitigating potential flow blockage risks. This study employs a high-pressure visual-flow pipeline system to systematically examine the effects of varying pipeline inclination angles (0, 5, 10, and 15°) on the hydrate generation rate. Natural gas solubility was predicted under hydrate formation conditions for a better understanding of gas-hydrate interactions and phase-transition behaviors, to optimize the generation conditions, and to assess the thermodynamic stability of hydrates. The findings reveal that the inclination angle significantly affects the gas phase behavior, alters fluid flow patterns, enhances gas–liquid mass transfer, and consequently accelerates hydrate generation. Furthermore, this study proposes the utilization of mixed slurry density as a proactive early warning indicator for monitoring hydrate formation.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 5","pages":"2077–2087 2077–2087"},"PeriodicalIF":2.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917066","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}