International Journal of Thermophysics最新文献

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Enhanced Thermophysical Properties of 40:60 % Ethylene Glycol and Water Mixture Based MgO + Fe3O4 Hybrid Nanofluids: An Experimental and ANN Predictions 基于40:60 %乙二醇和水的MgO + Fe3O4混合纳米流体的增强热物理性质:实验和人工神经网络预测
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-11 DOI: 10.1007/s10765-026-03817-4
L. S. Sundar, Sérgio M. O. Tavares, Antonio C. M. Sousa
{"title":"Enhanced Thermophysical Properties of 40:60 % Ethylene Glycol and Water Mixture Based MgO + Fe3O4 Hybrid Nanofluids: An Experimental and ANN Predictions","authors":"L. S. Sundar,&nbsp;Sérgio M. O. Tavares,&nbsp;Antonio C. M. Sousa","doi":"10.1007/s10765-026-03817-4","DOIUrl":"10.1007/s10765-026-03817-4","url":null,"abstract":"<div><p>The growing demand for efficient heat transfer and energy conversion systems require advanced working fluids with superior thermal transport properties. In this work, MgO, and Fe<sub>3</sub>O<sub>4</sub> nanoparticles were synthesized by using chemical coprecipitation method. Then, 40:60 % ethylene glycol and water mixture based MgO + Fe<sub>3</sub>O<sub>4</sub> hybrid nanofluids were produced by the two-step method. Three different compositions like 1:2, 1:1, and 2:1 of MgO and Fe<sub>3</sub>O<sub>4</sub> were used in this study. The hybrid nanofluids of 0.2–1.0 vol % were prepared, and thermal conductivity, viscosity, density, and specific heat were measured over temperatures ranging from 20 °C to 60 °C. Sodium dodecylbenzene sulfonate surfactant was used to enhance the stability of the hybrid nanofluids. Transmission electron microscopy, and X-ray diffraction techniques were used for the morphological characterization of the nanoparticles. Results show that thermal conductivity increases with increase of nanoparticles concentration as well as temperatures, whereas the viscosity decreases with temperature, but increases with nanoparticle concentration. Moreover, the density increases with nanoparticles concentration but decreased with temperatures, and the specific heat decreases with increase of nanoparticles, but increases with temperature. The same trend is observed for the three nanoparticles composition. At 1.0 vol % and 60 °C, thermal conductivity improved by 22.09 %, 25.12 %, and 29.07 % relative to base fluid, whereas, at 1.0 %, and 20 °C the viscosity improved by 51.3 %, 53.9 %, and 56.8 %, relative to base fluid at nanoparticles composition of 1:2, 1:1, and 2:1 in the base fluid. The useful empirical correlations were developed for all the prepared hybrid nanofluids for thermal conductivity, viscosity, density, and specific heat, which demonstrates the high predictive accuracy, with <i>R</i><sup>2</sup> values between 0.942 and 0.993. Artificial Neural Network (ANN)- Levenberg–Marquardt (LM) algorithm were used to train the experimental datasets to model nonlinear interactions between temperature, concentration, and thermophysical properties. Among all the datasets, the particle composition of 1:2 based hybrid nanofluids yielded the highest accuracy coupled with the lowest error values of the studied properties, e.g. thermal conductivity, MSE = 2.5036e<sup>−5</sup>, <i>R</i> = 0.99768; viscosity, MSE = 0.0035, <i>R</i> = 0.99925; density, MSE = 9.8186, <i>R</i> = 0.99142; specific heat, MSE = 28.941, <i>R</i> = 0.99783, respectively. Overall, the combined experimental and intelligent-modelling framework provides robust predictive capability for optimizing MgO + Fe<sub>3</sub>O<sub>4</sub> hybrid nanofluids.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature Dependence of Diglycolamine + Water Surface Tension: A Combined Experimental and Density Gradient Theory Study 二乙醇胺+水表面张力的温度依赖性:实验和密度梯度理论的结合研究
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-11 DOI: 10.1007/s10765-026-03822-7
Eduardo I. Concepción, Ariel Hernández
{"title":"Temperature Dependence of Diglycolamine + Water Surface Tension: A Combined Experimental and Density Gradient Theory Study","authors":"Eduardo I. Concepción,&nbsp;Ariel Hernández","doi":"10.1007/s10765-026-03822-7","DOIUrl":"10.1007/s10765-026-03822-7","url":null,"abstract":"<div><p>Chemical absorption using aqueous alkanolamine solutions remains the benchmark technology for post-combustion <span>(text {CO}_2)</span> capture, and diglycolamine (DGA) has emerged as an attractive solvent due to its high <span>(text {CO}_2)</span> loading capacity and favorable absorption kinetics. Accurate knowledge of surface tension is essential for the design of absorber–stripper units, yet the surface tension of DGA + water mixtures has, until now, only been reported in the literature at a single temperature (303.15 K), limiting the ability to model this system under other industrially conditions. In this work, the surface tension of DGA + water mixtures was experimentally measured over the entire composition range at four temperatures, <span>(T = 293.15)</span> K to 323.15 K, at atmospheric pressure. To the best of our knowledge, this constitutes the first systematic multi-temperature data set for this binary system. Surface tension decreases with increasing temperature and increases with DGA content; the surface tension deviation is negative across all compositions and temperatures, indicating preferential accumulation of DGA at the liquid surface. The experimental surface tension data were modeled with Density Gradient Theory (DGT) + Peng–Robinson equation of state (PR EoS) model, with the binary interaction parameter <span>(k_{ij})</span> regressed at each temperature, achieving an overall deviation of <span>(0.67,%)</span>. Furthermore, it was found that the binary mixture is not azeotropic and DGA accumulates at the interface in certain mixture compositions. This experimental and modeling study provides a more complete thermophysical characterization of DGA + water, relevant to the design of <span>(text {CO}_2)</span> capture processes.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature Dependence of Diglycolamine + Water Surface Tension: A Combined Experimental and Density Gradient Theory Study 二乙醇胺+水表面张力的温度依赖性:实验和密度梯度理论的结合研究
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-11 DOI: 10.1007/s10765-026-03822-7
Eduardo I. Concepción, Ariel Hernández
{"title":"Temperature Dependence of Diglycolamine + Water Surface Tension: A Combined Experimental and Density Gradient Theory Study","authors":"Eduardo I. Concepción,&nbsp;Ariel Hernández","doi":"10.1007/s10765-026-03822-7","DOIUrl":"10.1007/s10765-026-03822-7","url":null,"abstract":"<div><p>Chemical absorption using aqueous alkanolamine solutions remains the benchmark technology for post-combustion <span>(text {CO}_2)</span> capture, and diglycolamine (DGA) has emerged as an attractive solvent due to its high <span>(text {CO}_2)</span> loading capacity and favorable absorption kinetics. Accurate knowledge of surface tension is essential for the design of absorber–stripper units, yet the surface tension of DGA + water mixtures has, until now, only been reported in the literature at a single temperature (303.15 K), limiting the ability to model this system under other industrially conditions. In this work, the surface tension of DGA + water mixtures was experimentally measured over the entire composition range at four temperatures, <span>(T = 293.15)</span> K to 323.15 K, at atmospheric pressure. To the best of our knowledge, this constitutes the first systematic multi-temperature data set for this binary system. Surface tension decreases with increasing temperature and increases with DGA content; the surface tension deviation is negative across all compositions and temperatures, indicating preferential accumulation of DGA at the liquid surface. The experimental surface tension data were modeled with Density Gradient Theory (DGT) + Peng–Robinson equation of state (PR EoS) model, with the binary interaction parameter <span>(k_{ij})</span> regressed at each temperature, achieving an overall deviation of <span>(0.67,%)</span>. Furthermore, it was found that the binary mixture is not azeotropic and DGA accumulates at the interface in certain mixture compositions. This experimental and modeling study provides a more complete thermophysical characterization of DGA + water, relevant to the design of <span>(text {CO}_2)</span> capture processes.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental and Predictive Modeling Study of Liquid–Liquid Equilibria for Water + Toluene + (2-Methylpyridine, 2-Methylpyrazine, and Acetophenone) Ternary Systems Using Group Contribution and COSMO-Based Methods 基于基团贡献和cosmos方法的水+甲苯+(2-甲基吡啶,2-甲基吡嗪和苯乙酮)三元体系液-液平衡的实验和预测模型研究
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-08 DOI: 10.1007/s10765-026-03812-9
Ehsan Asadi, Agung Ari Wibowo, Muhammad Ossama, Petri Uusi-Kyyny, Juha-Pekka Pokki, Ville Alopaeus
{"title":"Experimental and Predictive Modeling Study of Liquid–Liquid Equilibria for Water + Toluene + (2-Methylpyridine, 2-Methylpyrazine, and Acetophenone) Ternary Systems Using Group Contribution and COSMO-Based Methods","authors":"Ehsan Asadi,&nbsp;Agung Ari Wibowo,&nbsp;Muhammad Ossama,&nbsp;Petri Uusi-Kyyny,&nbsp;Juha-Pekka Pokki,&nbsp;Ville Alopaeus","doi":"10.1007/s10765-026-03812-9","DOIUrl":"10.1007/s10765-026-03812-9","url":null,"abstract":"<div><p>2-Methylpyridine and 2-methylpyrazine form azeotropes with water, limiting the applicability of conventional distillation for their separation from aqueous mixtures. In addition, LLE data for acetophenone-containing systems remain scarce despite the broad industrial relevance of acetophenone. In this study, the LLE data were acquired for ternary systems of water + toluene + 2-methylpyridine, water + toluene + 2-methylpyrazine, and water + toluene + acetophenone at 298.15 and 313.15 K. Measured LLE data were successfully correlated by the NRTL model, and regressed binary interaction parameters were validated by topological analysis of the dimensionless molar Gibbs energy of mixing. The obtained LLE data were also utilized to evaluate the predictive capability of two classes of models: group-contribution methods (GCMs) and quantum-chemistry-based models. The studied GCMs included original UNIFAC, UNIFAC-LL, and modified UNIFAC (Dortmund), whereas the COSMO-based models comprised COSMO-SAC and COSMO-RS at the TZVP and TZVPD-FINE theory levels. Overall, all studied predictive models provided qualitatively acceptable predictions of the LLE behaviour. Among them, UNIFAC-LL showed the best overall predictive capability, whereas COSMO-SAC displayed the weakest performance. For COSMO-RS, the TZVPD-FINE level provided more accurate predictions of the experimental data than the TZVP level. UNIFAC performed better than modified UNIFAC (Dortmund) for the water + toluene + 2-methylpyridine system. In contrast, modified UNIFAC (Dortmund) yielded more accurate predictions than UNIFAC in the other two studied ternary systems.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-026-03812-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental and Predictive Modeling Study of Liquid–Liquid Equilibria for Water + Toluene + (2-Methylpyridine, 2-Methylpyrazine, and Acetophenone) Ternary Systems Using Group Contribution and COSMO-Based Methods 基于基团贡献和cosmos方法的水+甲苯+(2-甲基吡啶,2-甲基吡嗪和苯乙酮)三元体系液-液平衡的实验和预测模型研究
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-08 DOI: 10.1007/s10765-026-03812-9
Ehsan Asadi, Agung Ari Wibowo, Muhammad Ossama, Petri Uusi-Kyyny, Juha-Pekka Pokki, Ville Alopaeus
{"title":"Experimental and Predictive Modeling Study of Liquid–Liquid Equilibria for Water + Toluene + (2-Methylpyridine, 2-Methylpyrazine, and Acetophenone) Ternary Systems Using Group Contribution and COSMO-Based Methods","authors":"Ehsan Asadi,&nbsp;Agung Ari Wibowo,&nbsp;Muhammad Ossama,&nbsp;Petri Uusi-Kyyny,&nbsp;Juha-Pekka Pokki,&nbsp;Ville Alopaeus","doi":"10.1007/s10765-026-03812-9","DOIUrl":"10.1007/s10765-026-03812-9","url":null,"abstract":"<div><p>2-Methylpyridine and 2-methylpyrazine form azeotropes with water, limiting the applicability of conventional distillation for their separation from aqueous mixtures. In addition, LLE data for acetophenone-containing systems remain scarce despite the broad industrial relevance of acetophenone. In this study, the LLE data were acquired for ternary systems of water + toluene + 2-methylpyridine, water + toluene + 2-methylpyrazine, and water + toluene + acetophenone at 298.15 and 313.15 K. Measured LLE data were successfully correlated by the NRTL model, and regressed binary interaction parameters were validated by topological analysis of the dimensionless molar Gibbs energy of mixing. The obtained LLE data were also utilized to evaluate the predictive capability of two classes of models: group-contribution methods (GCMs) and quantum-chemistry-based models. The studied GCMs included original UNIFAC, UNIFAC-LL, and modified UNIFAC (Dortmund), whereas the COSMO-based models comprised COSMO-SAC and COSMO-RS at the TZVP and TZVPD-FINE theory levels. Overall, all studied predictive models provided qualitatively acceptable predictions of the LLE behaviour. Among them, UNIFAC-LL showed the best overall predictive capability, whereas COSMO-SAC displayed the weakest performance. For COSMO-RS, the TZVPD-FINE level provided more accurate predictions of the experimental data than the TZVP level. UNIFAC performed better than modified UNIFAC (Dortmund) for the water + toluene + 2-methylpyridine system. In contrast, modified UNIFAC (Dortmund) yielded more accurate predictions than UNIFAC in the other two studied ternary systems.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-026-03812-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination and Correlation of the Solubility of 2,4,6-Trinitro-3-Bromoanisole in Ethyl Acetate + Cyclohexane Binary Solvent Mixtures from 278.15 to 318.15 K 2,4,6-三硝基-3-溴苯甲醚在278.15 ~ 318.15 K乙酸乙酯+环己烷二元溶剂混合物中的溶解度测定及相关性
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-08 DOI: 10.1007/s10765-026-03818-3
Guannan Zhao, Yujie Feng, Guanchao Lan, Shangbiao Feng, Yunlu Li, Jianlong Wang, Yucun Liu
{"title":"Determination and Correlation of the Solubility of 2,4,6-Trinitro-3-Bromoanisole in Ethyl Acetate + Cyclohexane Binary Solvent Mixtures from 278.15 to 318.15 K","authors":"Guannan Zhao,&nbsp;Yujie Feng,&nbsp;Guanchao Lan,&nbsp;Shangbiao Feng,&nbsp;Yunlu Li,&nbsp;Jianlong Wang,&nbsp;Yucun Liu","doi":"10.1007/s10765-026-03818-3","DOIUrl":"10.1007/s10765-026-03818-3","url":null,"abstract":"<div><p>2,4,6-Trinitro-3-bromoanisole (TNBA) is a low-sensitivity melt-cast explosive carrier with higher energetic performance than TNT and has potential use as an alternative melt-cast component. The solid–liquid equilibrium solubility of TNBA in nine ethyl acetate + cyclohexane binary mixtures was measured by a laser dynamic method at 278.15 to 318.15 K under atmospheric pressure. At a fixed solvent composition, the mole fraction solubility increased with temperature; at a fixed temperature, it increased with the mole fraction of ethyl acetate. TNBA was only sparingly soluble in cyclohexane, suggesting that cyclohexane may be used as an antisolvent for TNBA crystallization. The experimental data were correlated with the modified Apelblat, Yaws, Buchowski–Książczak λh, and Jouyban–Acree models. The modified Apelblat and Yaws equations gave the most accurate correlations, with overall ARD values below 0.006 and RMSD values below 1.0 × 10<sup>–3</sup>. The Jouyban–Acree model also described the temperature–composition dependence well, with R<sup>2</sup> = 0.9998 and RMSD = 0.4050 × 10<sup>–3</sup>. Thermodynamic analysis showed that TNBA dissolution is endothermic, with a favorable entropy contribution, while the enthalpic contribution is dominant (%ξH &gt; 64 %). These results can support solvent selection and antisolvent crystallization design for TNBA.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination and Correlation of the Solubility of 2,4,6-Trinitro-3-Bromoanisole in Ethyl Acetate + Cyclohexane Binary Solvent Mixtures from 278.15 to 318.15 K 2,4,6-三硝基-3-溴苯甲醚在278.15 ~ 318.15 K乙酸乙酯+环己烷二元溶剂混合物中的溶解度测定及相关性
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-08 DOI: 10.1007/s10765-026-03818-3
Guannan Zhao, Yujie Feng, Guanchao Lan, Shangbiao Feng, Yunlu Li, Jianlong Wang, Yucun Liu
{"title":"Determination and Correlation of the Solubility of 2,4,6-Trinitro-3-Bromoanisole in Ethyl Acetate + Cyclohexane Binary Solvent Mixtures from 278.15 to 318.15 K","authors":"Guannan Zhao,&nbsp;Yujie Feng,&nbsp;Guanchao Lan,&nbsp;Shangbiao Feng,&nbsp;Yunlu Li,&nbsp;Jianlong Wang,&nbsp;Yucun Liu","doi":"10.1007/s10765-026-03818-3","DOIUrl":"10.1007/s10765-026-03818-3","url":null,"abstract":"<div><p>2,4,6-Trinitro-3-bromoanisole (TNBA) is a low-sensitivity melt-cast explosive carrier with higher energetic performance than TNT and has potential use as an alternative melt-cast component. The solid–liquid equilibrium solubility of TNBA in nine ethyl acetate + cyclohexane binary mixtures was measured by a laser dynamic method at 278.15 to 318.15 K under atmospheric pressure. At a fixed solvent composition, the mole fraction solubility increased with temperature; at a fixed temperature, it increased with the mole fraction of ethyl acetate. TNBA was only sparingly soluble in cyclohexane, suggesting that cyclohexane may be used as an antisolvent for TNBA crystallization. The experimental data were correlated with the modified Apelblat, Yaws, Buchowski–Książczak λh, and Jouyban–Acree models. The modified Apelblat and Yaws equations gave the most accurate correlations, with overall ARD values below 0.006 and RMSD values below 1.0 × 10<sup>–3</sup>. The Jouyban–Acree model also described the temperature–composition dependence well, with R<sup>2</sup> = 0.9998 and RMSD = 0.4050 × 10<sup>–3</sup>. Thermodynamic analysis showed that TNBA dissolution is endothermic, with a favorable entropy contribution, while the enthalpic contribution is dominant (%ξH &gt; 64 %). These results can support solvent selection and antisolvent crystallization design for TNBA.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermophysical Properties and Barker–Henderson Perturbation Modeling of 2-(Dimethylamino)ethanol + 1-Alkanol (C5–C10) Mixtures 2-(二甲氨基)乙醇+ 1-烷醇(C5-C10)混合物的热物理性质和Barker-Henderson微扰模型
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-04 DOI: 10.1007/s10765-026-03813-8
Chengze Wu, Sai Zhang, Aymen Bourezgui, Ahmad Bilal Ahmadullah, Mohammad Almasi, Mustafa Bayram
{"title":"Thermophysical Properties and Barker–Henderson Perturbation Modeling of 2-(Dimethylamino)ethanol + 1-Alkanol (C5–C10) Mixtures","authors":"Chengze Wu,&nbsp;Sai Zhang,&nbsp;Aymen Bourezgui,&nbsp;Ahmad Bilal Ahmadullah,&nbsp;Mohammad Almasi,&nbsp;Mustafa Bayram","doi":"10.1007/s10765-026-03813-8","DOIUrl":"10.1007/s10765-026-03813-8","url":null,"abstract":"<div><p>Densities and viscosities of binary mixtures comprising 2-(dimethylamino)ethanol (DMAE) and a homologous series of 1-alkanols (1-pentanol to 1-decanol) were investigated to elucidate their molecular interactions and non-ideal thermophysical behavior. The derived properties, including excess molar volumes (<i>V</i><sup><i>E</i></sup>) and viscosity deviations (Δ<i>η</i>), exhibit positive and negative deviations from ideality, respectively. The magnitudes of both <i>V</i><sup><i>E</i></sup> and Δ<i>η</i> increase systematically with the elongation of the alkyl chain, indicating that the disruption of the alcohol’s self-associated hydrogen-bonded networks and steric hindrance dominate over specific cross-interactions. Furthermore, the Barker–Henderson (BH) perturbation theory was successfully applied to model the volumetric behavior of these complex mixtures. The BH framework demonstrated reasonable accuracy in predicting mixture densities, yielding average absolute deviations (AAD) ranging from 0.033 % to 0.088 %, with maximum absolute deviations not exceeding 1.227 kg/m<sup>3</sup>. The optimized binary interaction parameter (<i>k</i><sub>12</sub>) increased progressively from 0.02 to 0.09 as the carbon chain lengthened, mathematically capturing the growing structural asymmetry and non-ideality of the systems. These findings confirm that the BH perturbation theory is a highly robust and reliable tool for correlating the thermodynamic properties of associating fluid mixtures, providing valuable insights for chemical process design and thermodynamic modeling.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal and Drying Performance of a Double Pass Solar Air Heater Assisted by Graphene and Hexagonal Boron Nitride-Doped Eutectic Phase Change Material 石墨烯和六方氮化硼共晶相变材料辅助双通道太阳能空气加热器的热干燥性能
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-04 DOI: 10.1007/s10765-026-03820-9
Nergiz Ulker, Hüsamettin Bulut, Naciye Unver, Gokhan Demircan
{"title":"Thermal and Drying Performance of a Double Pass Solar Air Heater Assisted by Graphene and Hexagonal Boron Nitride-Doped Eutectic Phase Change Material","authors":"Nergiz Ulker,&nbsp;Hüsamettin Bulut,&nbsp;Naciye Unver,&nbsp;Gokhan Demircan","doi":"10.1007/s10765-026-03820-9","DOIUrl":"10.1007/s10765-026-03820-9","url":null,"abstract":"<div><p>Solar dryers are challenged to maintain a homogeneous drying air temperature because cloud cover and rapid fluctuations in solar radiation disrupt heat supply, reducing efficiency and process reliability. Integrating phase change materials (PCMs) provides thermal energy storage that reduces these variations and limits temperature drops during low solar radiation periods. In this work, a double pass solar air heater (DPSAH) drying system was developed and tested under real outdoor conditions to achieve more stable and effective drying of agricultural products. An eco-friendly eutectic PCM doped with hexagonal boron nitride (hBN) and graphene (GN) nanoparticles was incorporated into the DPSAH and connected to a drying cabinet to promote uniform drying. Field experiments were performed on Urfa pepper in Şanlıurfa, Türkiye, a hot climate region locally. Experiments were performed at inlet air velocities of 3 m·s<sup>−1</sup>, 6 m·s<sup>−1</sup>, and 9 m·s<sup>−1</sup> using a two-step charging-discharging process. At each air velocity, four DPSAH dryers were compared against open sun drying. The results showed that GN-doped PCM significantly improved the drying performance. At an inlet air velocity of 6 m·s<sup>−1</sup>, the PCM-GN integrated DPSAH (DG) configuration delivered the highest performance, achieving a useful heat gain of 462.6 W and an average thermal efficiency of 83.4 %. In addition, the lowest moisture and water activity, as well as the best color preservation and highest antioxidant values, were obtained for the DG configuration at an inlet air velocity of 6 m·s<sup>−1</sup>. Results confirmed that improved heat transfer in nanoparticle-doped PCM directly improved overall system performance significantly.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction: Measurement and Thermodynamic Modeling of 2,4,6-Trinitrotoluene Solubility in Pyridine + Ethanol Mixed Solvents 修正:2,4,6-三硝基甲苯在吡啶+乙醇混合溶剂中的溶解度的测量和热力学模型
IF 3.6 4区 工程技术
International Journal of Thermophysics Pub Date : 2026-08-04 DOI: 10.1007/s10765-026-03810-x
Bo Wang, Qiang Liu, Cong-chao He, Jing-ye Jia, Jun Chen, Li-zhen Chen, Jian-long Wang
{"title":"Correction: Measurement and Thermodynamic Modeling of 2,4,6-Trinitrotoluene Solubility in Pyridine + Ethanol Mixed Solvents","authors":"Bo Wang,&nbsp;Qiang Liu,&nbsp;Cong-chao He,&nbsp;Jing-ye Jia,&nbsp;Jun Chen,&nbsp;Li-zhen Chen,&nbsp;Jian-long Wang","doi":"10.1007/s10765-026-03810-x","DOIUrl":"10.1007/s10765-026-03810-x","url":null,"abstract":"","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"47 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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