Journal of Supercritical Fluids最新文献_第2页

Numerical study on flow and heat transfer characteristics of supercritical methane in microchannels with airfoil fins

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-17 DOI: 10.1016/j.supflu.2025.106596

Chenchen Zhao , Yue Wang , Liu Yang , Bin Zhao , Qian Li , Weihua Cai

{"title":"Numerical study on flow and heat transfer characteristics of supercritical methane in microchannels with airfoil fins","authors":"Chenchen Zhao , Yue Wang , Liu Yang , Bin Zhao , Qian Li , Weihua Cai","doi":"10.1016/j.supflu.2025.106596","DOIUrl":"10.1016/j.supflu.2025.106596","url":null,"abstract":"<div><div>In order to study the thermal and flow properties of interstage coolers in the liquefaction of methane process, numerical analyses were carried out on methane flow within a printed circuit heat exchanger (PCHE) with airfoil fins. A geometry model was developed in this research to include staggered microchannels with airfoil fins. The SST <em>k-ω</em> turbulence model was utilized in the analysis of how various operating parameters, including inlet flux, outlet pressure and inlet temperature, impact flow and thermal characteristics. It was found that higher inlet temperatures result in improved thermal feature but are also associated with increased resistance. Conversely, higher outlet pressure conditions led to better overall flow and thermal feature. Furthermore, the impact of airfoil fins on flow characteristics was studied, considering factors such as secondary flow intensity and entropy generation. Correlations for Fanning frictional factor and Nusselt number were developed with a margin of error within ± 3.5 %. These research findings are intended to benefit the design and optimization of PCHEs featuring airfoil fins microchannels for applications.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106596"},"PeriodicalIF":3.4,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143677702","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}

引用次数: 0

Techno-economic analysis of amino acids production with subcritical water technology

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-15 DOI: 10.1016/j.supflu.2025.106595

William Gustavo Sganzerla , Barbara Pezzini Moreira , Daniel Lachos-Perez , Giovani L. Zabot , Luiz Eduardo Nochi Castro , Tânia Forster-Carneiro , Maurício Ariel Rostagno

{"title":"Techno-economic analysis of amino acids production with subcritical water technology","authors":"William Gustavo Sganzerla , Barbara Pezzini Moreira , Daniel Lachos-Perez , Giovani L. Zabot , Luiz Eduardo Nochi Castro , Tânia Forster-Carneiro , Maurício Ariel Rostagno","doi":"10.1016/j.supflu.2025.106595","DOIUrl":"10.1016/j.supflu.2025.106595","url":null,"abstract":"<div><div>This study conducted a techno-economic assessment of amino acid production from brewers’ spent grains (BSG) using semi-continuous subcritical water hydrolysis. The process was operated at a pressure of 15 MPa, with a water flow rate of 5 mL/min, a solvent-to-feed ratio of 20 g water/g BSG, and at various temperatures (80 °C to 180 °C). The experimental results demonstrated that the amino acid yield of the single subcritical reactor (10.20 mg/g BSG) was higher compared to the two-sequential reactors (4.72 mg/g BSG). The hydrolysate obtained experimentally was composed mainly of tryptophan (215 µg/mL), valine (64 µg/mL), and aspartic acid (123 µg/mL). The economic analysis revealed that the manufacturing cost of amino acids ranged from 33.66 USD/kg to 49.42 USD/kg. The implementation cost of downstream processing represents the most significant fixed capital investment, as complex unit operations are required to isolate and purify amino acids.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106595"},"PeriodicalIF":3.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642771","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}

引用次数: 0

Thermal and hydraulic performance of half-cone minichannel design for supercritical CO2 PCHE

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-13 DOI: 10.1016/j.supflu.2025.106594

Haisong Zhang , Bo Wang , Xiang Xu , Lin Chen , Tianshu Song , Bingguo Zhu

引用次数: 0

Revealing the catalytic gasification mechanisms of toluene and naphthalene in supercritical water using ReaxFF-MD and DFT methods 利用 ReaxFF-MD 和 DFT 方法揭示超临界水中甲苯和萘的催化气化机理

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-12 DOI: 10.1016/j.supflu.2025.106593

Linhu Li , Gaoyun Wang , Xujun Li , Shi Liu , Wen Cao

{"title":"Revealing the catalytic gasification mechanisms of toluene and naphthalene in supercritical water using ReaxFF-MD and DFT methods","authors":"Linhu Li , Gaoyun Wang , Xujun Li , Shi Liu , Wen Cao","doi":"10.1016/j.supflu.2025.106593","DOIUrl":"10.1016/j.supflu.2025.106593","url":null,"abstract":"<div><div>Supercritical water gasification (SCWG) is a promising method for treating hazardous oily sludge waste from petroleum industry. However, achieving complete gasification under mild conditions remains challenging, particularly for persistent intermediates such as toluene and naphthalene. Herein, molecular dynamics simulations are used to explore the impact of Na<sub>2</sub>CO<sub>3</sub> on target product yields from toluene and naphthalene in SCWG. The findings reveal that Na<sub>2</sub>CO<sub>3</sub> considerably enhances radical yields within the reaction system, especially OH radicals, leading to increased gas production (H<sub>2</sub>, CO, and CO<sub>2</sub>). Molecular dynamics and density functional theory calculations reveal that Na<sub>2</sub>CO<sub>3</sub> accelerates the ring-opening process and reduces the energy barrier of toluene and naphthalene to 7.4379 ± 0.0001 kcal/mol and 53.5887 ± 0.0011 kcal/mol, respectively. This study highlights OH radicals as an effective active substance in SCWG aromatic conversion. Further catalyst optimization and system design are essential for a highly efficient and clean oily sludge treatment.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106593"},"PeriodicalIF":3.4,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619214","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}

引用次数: 0

Energy and exergy analysis of a transcritical CO2 refrigeration system integrated with vapor injection and mechanical subcooling

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-10 DOI: 10.1016/j.supflu.2025.106592

Zeye Zheng, Dewei Lv, Qichao Yang, Guangbin Liu, Yuanyang Zhao, Liansheng Li

{"title":"Energy and exergy analysis of a transcritical CO2 refrigeration system integrated with vapor injection and mechanical subcooling","authors":"Zeye Zheng, Dewei Lv, Qichao Yang, Guangbin Liu, Yuanyang Zhao, Liansheng Li","doi":"10.1016/j.supflu.2025.106592","DOIUrl":"10.1016/j.supflu.2025.106592","url":null,"abstract":"<div><div>Mechanical subcooling is an effective method to improve the transcritical CO<sub>2</sub> refrigeration system. To further improve its performance, a transcritical CO<sub>2</sub> refrigeration system is investigated with vapor injection and mechanical subcooling (MVS) using R152a as an auxiliary circulating refrigerant. A comparative analysis with the basic vapor injection CO<sub>2</sub> refrigeration system (BVS) and the mechanical subcooling CO<sub>2</sub> refrigeration system (MSS) is conducted from the perspective of energy and exergy. The results indicate that there are optimal values for the compressor discharge pressure, subcooling degree, and relative intermediate pressure coefficient, which together can maximize the COP of MVS under various operating conditions. At an evaporation temperature of −15 °C and a gas cooler outlet temperature of 40 °C, MVS has a COP of 1.9, which is 17.8 % and 4.9 % higher compared to the BVS and MSS, respectively. The exergy efficiency is increased by 9.5 % and 6.6 %, respectively.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106592"},"PeriodicalIF":3.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610839","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}

引用次数: 0

Experimental investigation on the stress of supercritical and dense-phase CO2 pipeline system in the venting process 超临界和浓相二氧化碳管道系统在排放过程中的应力实验研究

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-08 DOI: 10.1016/j.supflu.2025.106576

Zhaolan Li , Qihui Hu , Yuxing Li , Buze Yin , Liesibieke Talafubieke , Xuefeng Zhao , Lan Meng , Jianlu Zhu , Wuchang Wang

{"title":"Experimental investigation on the stress of supercritical and dense-phase CO2 pipeline system in the venting process","authors":"Zhaolan Li , Qihui Hu , Yuxing Li , Buze Yin , Liesibieke Talafubieke , Xuefeng Zhao , Lan Meng , Jianlu Zhu , Wuchang Wang","doi":"10.1016/j.supflu.2025.106576","DOIUrl":"10.1016/j.supflu.2025.106576","url":null,"abstract":"<div><div>Releasing supercritical and dense-phase CO<sub>2</sub> from pipelines entails significant phase transitions and swift depressurization. This leads to significant temperature drops and reverse thrust forces, posing risks to pipeline integrity and support structures. This study investigates stress distribution across pipeline sections during vertical and horizontal releases of supercritical and dense-phase CO<sub>2</sub>, aiming to quantify external thrust generated during discharge. Experiments were conducted at pressures ranging from 7.5 MPa to 10.0 MPa and temperatures between 25 °C and 40 °C. Maximum stress distribution across pipeline sections was measured, and a practical formula was developed to estimate external thrust during CO<sub>2</sub> discharge. The effects of impurities like N<sub>2</sub> and CH<sub>4</sub> on pipeline vibrations and stresses were also examined. Results indicate that maximum stress concentration occurs near the initial support point, mainly due to the excessive strength of a singular support structure. During CO<sub>2</sub> release, the pipeline system undergoes significant vibrations, leading to excessive longitudinal and hoop stresses. Impurities such as N<sub>2</sub> and CH<sub>4</sub> further exacerbate flow non-uniformity and vibration intensity. Notably, dense-phase CO<sub>2</sub> discharge generates higher maximum stress under identical conditions than supercritical CO<sub>2</sub> discharge. The reverse thrust formula demonstrates reasonable applicability under supercritical conditions. The findings emphasize the importance of considering phase behavior and impurity effects in pipeline safety assessments.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106576"},"PeriodicalIF":3.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619215","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}

引用次数: 0

Mechanism analysis of convective heat transfer of supercritical CO2 in heated vertical-flow tube

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-06 DOI: 10.1016/j.supflu.2025.106586

Lei Chen , Meng Zhu , Haoran Qing , Lingang Zhou , Can Wang , Jing Zhou , Kai Xu , Jun Xu , Long Jiang , Sheng Su , Song Hu , Jun Xiang

{"title":"Mechanism analysis of convective heat transfer of supercritical CO2 in heated vertical-flow tube","authors":"Lei Chen , Meng Zhu , Haoran Qing , Lingang Zhou , Can Wang , Jing Zhou , Kai Xu , Jun Xu , Long Jiang , Sheng Su , Song Hu , Jun Xiang","doi":"10.1016/j.supflu.2025.106586","DOIUrl":"10.1016/j.supflu.2025.106586","url":null,"abstract":"<div><div>Supercritical carbon dioxide is a promising working fluid for power generation due to its superior heat transfer properties. To investigate its heat transfer behavior under in a vertical tube under operating conditions, an combined experimental and numerical study was conducted. Parameters range from (15−27) MPa of pressure, (763–2774) kg/(m<sup>2</sup>s) of mass flux, (207−424) kW/m<sup>2</sup> of heat flux. Results show that pressure and mass flux effects on heat transfer coefficients are consistent under uniform heating conditions. However, under high heat flux conditions, the non-uniform distribution of fluid density along the flow direction reduces turbulence production, leading to a lower heat transfer coefficient. Moreover, a new heat transfer correlation was proposed. The predictive and experimental values demonstrated a high correlation, with 79.30 % of data points falling within a 10 % error range and 100 % within a 20 % error range.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106586"},"PeriodicalIF":3.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619213","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}

引用次数: 0

Phase behavior of carbon dioxide/dioctyl phthalate and trioctyl trimellitate systems

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-06 DOI: 10.1016/j.supflu.2025.106589

Hiroaki Matsukawa, Katsuto Otake

{"title":"Phase behavior of carbon dioxide/dioctyl phthalate and trioctyl trimellitate systems","authors":"Hiroaki Matsukawa, Katsuto Otake","doi":"10.1016/j.supflu.2025.106589","DOIUrl":"10.1016/j.supflu.2025.106589","url":null,"abstract":"<div><div>Phthalate plasticizers, which are widely used as general-purpose plasticizers for polyvinyl chloride (PVC), have been identified as harmful to human health. This has created a pressing need to separate these substances from PVC products. In addition, the potential contamination of trioctyl trimellitate (TOTM), an alternative to phthalate plasticizers, with dioctyl phthalate (DOP) cannot be overlooked. Supercritical carbon dioxide (scCO<sub>2</sub>) has been proposed as a solvent for extracting and separating these compounds; therefore, understanding the phase behavior of these systems is critical for optimizing the process design. This study investigated the phase behavior of CO<sub>2</sub>/DOP and CO<sub>2</sub>/TOTM binary systems using a synthetic method combined with a laser displacement technique to measure the movement of the piston in a high-pressure vessel. The phase boundaries were determined over temperature and CO<sub>2</sub> mole fraction ranges of (313–373) K and (0.2–0.9), respectively. The vapor–liquid equilibria of the two experimentally obtained binary systems were correlated using the Sanchez-Lacombe equation of state. The one- and two-parameter mixing rules were tested, with better correlation over a wide composition range achieved using the two-parameter mixing rule. The results of this study imply that while separating DOP and TOTM using scCO<sub>2</sub> may be challenging, scCO<sub>2</sub> shows great potential as an extraction solvent for both plasticizers.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106589"},"PeriodicalIF":3.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580098","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}

引用次数: 0

Modeling of supercritical hydrogen thermodynamic properties using cubic and SAFT type equations of state

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-06 DOI: 10.1016/j.supflu.2025.106588

Arash Pakravesh , Amir H. Mohammadi , Dominique Richon

{"title":"Modeling of supercritical hydrogen thermodynamic properties using cubic and SAFT type equations of state","authors":"Arash Pakravesh , Amir H. Mohammadi , Dominique Richon","doi":"10.1016/j.supflu.2025.106588","DOIUrl":"10.1016/j.supflu.2025.106588","url":null,"abstract":"<div><div>Hydrogen, recognized as a future fuel, is considered one of the most sustainable energy sources. Accurate prediction of its thermophysical properties, particularly at high pressures, is essential for the design and development of industrial applications. Equations of state (EoSs), as practical tools for thermodynamic modeling, provide a reliable means of predicting hydrogen's thermodynamic properties. However, due to the variety of available EoSs comparing their performance in predicting the thermodynamic behavior of supercritical hydrogen can help optimize their application in real systems. This study assessed the accuracy of the PR, SRK, Quantum-corrected PR (QPR), three versions of the PρT-SAFT, and five versions of the PC-SAFT EoSs in predicting the thermodynamic properties of supercritical hydrogen under a vast range of pressures (10–2000 MPa) and temperatures (100–1000 K), including volumetric properties, caloric properties, and the Joule-Thomson effect. Additionally, the accuracy of SAFT type EoSs in reproducing hydrogen’s critical point was evaluated, revealing that the rescaled versions of PρT-SAFT EoS yield the most precise predictions of hydrogen's thermodynamic properties. Additionally, a comparison of SAFT and QPR type EoSs for predicting hydrogen's saturated thermodynamic properties shows that QPR performs best. Lastly, the ability of all eleven EoSs to accurately describe the thermodynamic properties of supercritical hydrogen in a limited range of pressures (10–100 MPa) and temperatures (100–400 K), which are more relevant to industrial applications, were investigated and compared with molecular dynamics simulation results. In these regions, the EoSs show promising results, with SRK and PρT-SAFT delivering the best performance.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106588"},"PeriodicalIF":3.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628974","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}

引用次数: 0

Multiscale simulation of polyethylene dissolution and dispersion for flash pressure release spinning solutions

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-06 DOI: 10.1016/j.supflu.2025.106587

Jiacheng Zhu, Jin Wen, Chao Jia, Meifang Zhu

引用次数: 0