Journal of Supercritical Fluids最新文献_第10页

Preparation of ultrathin two-dimensional nanosheet Ni/TiO2-SC catalyst and their catalytic performance in the liquid-phase hydrogenation of maleic anhydride 超薄二维纳米片Ni/TiO2-SC催化剂的制备及其在马来酸酐液相加氢中的催化性能

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-26 DOI: 10.1016/j.supflu.2025.106573

Yin Zhang, Wei Wei, Chengliang Wang, Di Zhang, Haitao Li, Dongjie Zhang, Yue Zhang

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Sustainable extraction of bioactive compounds from Vismia guianensis based on the principles of green chemistry 基于绿色化学原理的桂枝生物活性化合物可持续提取

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-24 DOI: 10.1016/j.supflu.2025.106562

Kriptsan Abdon Poletto Diel , Leandro Martins Siqueira , Pablo Pitol Silveira , Júlia Maier Labes , Mariana Koetz , Lucas Cardoso Marinho , Eduardo Cassel , Rubem Mário Figueiró Vargas , Gilsane Lino von Poser

{"title":"Sustainable extraction of bioactive compounds from Vismia guianensis based on the principles of green chemistry","authors":"Kriptsan Abdon Poletto Diel , Leandro Martins Siqueira , Pablo Pitol Silveira , Júlia Maier Labes , Mariana Koetz , Lucas Cardoso Marinho , Eduardo Cassel , Rubem Mário Figueiró Vargas , Gilsane Lino von Poser","doi":"10.1016/j.supflu.2025.106562","DOIUrl":"10.1016/j.supflu.2025.106562","url":null,"abstract":"<div><div><em>Vismia guianensis</em> (Aubl.) Choisy (Hypericaceae), a medicinal plant prevalent in the Amazon Forest region, presents anthraquinones as the main compounds. This study aims to compare the chemical composition of extracts obtained using organic solvents and supercritical CO<sub>2</sub> (scCO<sub>2</sub>) under varying conditions. Additionally, mathematical models were applied to predict extraction kinetics. The results indicated that the extracts contained vismiaquinone A and physcion, among other minor anthraquinones, with scCO<sub>2</sub> proving to be more efficient in extracting both compounds. Notably, scCO<sub>2</sub> exhibited a higher selectivity for vismiaquinone A, yielding remarkably greater amounts. The mathematical modeling confirmed the consistency between the response surface method and the experimental data. In addition to demonstrating the effectiveness of an environmentally friendly extraction method, this research aims to add value to a medicinal plant widely used in Brazil, yet underexplored for its pharmacological and economic potential.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"221 ","pages":"Article 106562"},"PeriodicalIF":3.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551826","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}

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CO2 trapping mechanism in deep saline aquifers under the control of composite geological factors: A numerical case study in China 复合地质因素控制下深层含盐含水层CO2捕集机制——以中国为例

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-17 DOI: 10.1016/j.supflu.2025.106547

Xiaoyuan Li , Gaofan Yue

{"title":"CO2 trapping mechanism in deep saline aquifers under the control of composite geological factors: A numerical case study in China","authors":"Xiaoyuan Li , Gaofan Yue","doi":"10.1016/j.supflu.2025.106547","DOIUrl":"10.1016/j.supflu.2025.106547","url":null,"abstract":"<div><div>The increasingly intensifying global climatic change necessitates carbon capture and storage. Reservoir physical properties including porosity, permeability, temperature, and pressure directly control the spatial migration, storage forms, and storage capacity of CO<sub>2</sub> in saline aquifers. Based on China’s first CCS demonstration project in saline aquifers, this study constructed a water-CO<sub>2</sub>-thermal-chemical coupling model for long-term CCS in reservoirs. The results indicate that the deep saline aquifers in the Ordos Basin are favorable for CO<sub>2</sub> mineral trapping, with a mineralization storage amount reaching up to 64.02 % of the total injection amount at 1000 years. Temperature is identified as the most significant factor influencing safe CO<sub>2</sub> mineral trapping under CO<sub>2</sub> injection. The study not only provides valuable insights into the mechanisms of CO<sub>2</sub> trapping but also lays a foundation for optimizing the design of ongoing CCS projects and evaluating site suitability for future projects, facilitating progress toward China's carbon neutrality target.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"221 ","pages":"Article 106547"},"PeriodicalIF":3.4,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489035","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}

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Valorization of cocoa bean shell residue from supercritical fluid extraction through hydrothermal carbonization for porous material production 超临界流体萃取可可豆壳渣水热炭化制备多孔材料的研究

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-17 DOI: 10.1016/j.supflu.2025.106550

Ji Sun Lim , Seung Eun Lee , Bonggeun Shong , Young-Kwon Park , Hong-shik Lee

{"title":"Valorization of cocoa bean shell residue from supercritical fluid extraction through hydrothermal carbonization for porous material production","authors":"Ji Sun Lim , Seung Eun Lee , Bonggeun Shong , Young-Kwon Park , Hong-shik Lee","doi":"10.1016/j.supflu.2025.106550","DOIUrl":"10.1016/j.supflu.2025.106550","url":null,"abstract":"<div><div>This study investigated the potential for high-value utilization of cocoa shell (CS) residues derived from supercritical fluid extraction (SFE) by converting them into hydrochar through hydrothermal carbonization (HTC) and activation (A-HTC). Hydrochar produced from residues extracted with water as a co-solvent exhibited the highest carbon content (78.7 %) after HTC and activation, highlighting the critical role of the co-solvent in optimizing dehydrogenation and dehydration reactions. Structural analysis revealed that residues rich in water-soluble components formed smaller pores, whereas lipid-rich residues formed larger pores. Activated hydrochar obtained from water-extracted residues demonstrated the largest surface area (315 m²/g) and pore diameter (7.10 nm), indicating mesoporous properties suitable for adsorption applications. The Van Krevelen diagram confirmed that HTC hydrochar stability improved through condensation and aromatization processes. By integrating SFE with HTC, this study presents a systematic approach for converting by-products into high-value hydrochar, offering a sustainable solution for resource recycling and utilization.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"221 ","pages":"Article 106550"},"PeriodicalIF":3.4,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479863","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}

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Enhanced density modeling of hydrocarbon fuels at near supercritical gas-liquid boundary and high-pressure liquid region using a new volume-translated three-parameter cubic equation of state 基于新的体积转换三参数三次状态方程的近超临界气液边界和高压液体区域碳氢燃料密度模型

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-15 DOI: 10.1016/j.supflu.2025.106548

Jiwan Seo , Jaesung Lee , Sangwoo Lee , Jaeho Lee , Kyu Hong Kim

{"title":"Enhanced density modeling of hydrocarbon fuels at near supercritical gas-liquid boundary and high-pressure liquid region using a new volume-translated three-parameter cubic equation of state","authors":"Jiwan Seo , Jaesung Lee , Sangwoo Lee , Jaeho Lee , Kyu Hong Kim","doi":"10.1016/j.supflu.2025.106548","DOIUrl":"10.1016/j.supflu.2025.106548","url":null,"abstract":"<div><div>Recently, understanding the Equation of State (EoS) has become increasingly critical for high-fidelity numerical simulations of hydrocarbon-fueled cooling channel and internal combustion engine. However, selecting an appropriate EoS that balances a straightforward algorithm with high predictive accuracy for density across various fluids remains challenging. In this work, integrating and applying simple modifications to the Redlich-Kwong-Peng-Robinson (RKPR) EoS, the generalized Redlich-Kwong (gRK) attraction term, and the Volume-Translation (VT) method present to achieve improvements in three key areas: (1) extending EoS applicability from low to high critical compressibility factor, (2) enhancing density prediction near the supercritical gas-liquid boundary, and (3) improving density prediction within the high-pressure liquid region. To evaluate the performance of the newly developed Volume-Translated Redlich-Kwong Peng-Robinson (VTRKPR) EoS, density of fluids (exo-THDCPD, n-decane, n-dodecane) over a wide range of pressures and temperatures is calculated using various EoSs and the NIST database with the SUPERTRAPP and REFPROP programs. Results confirm that the VTRKPR EoS provides superior density predictions compared to other EoSs.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"220 ","pages":"Article 106548"},"PeriodicalIF":3.4,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444283","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}

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Apparent molar volumes of isoprene and limonene in dense-phase CO2 异戊二烯和柠檬烯在浓相CO2中的表观摩尔体积

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-15 DOI: 10.1016/j.supflu.2025.106544

Safeer S. Nanji, Robert A. Marriott

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Supercritical extraction of butter from agroindustrial cocoa residue from the Amazon 从亚马逊地区农业工业可可渣中超临界提取黄油

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-13 DOI: 10.1016/j.supflu.2025.106560

Jean Maurício Leão Pinheiro , Ana Paula de Souza e Silva , Kelly Roberta Pinheiro Pantoja , Marcos Antônio Ribeiro Cardoso , Fernando de Freitas Maues de Azevedo , Leonardo Victor Gomes de Melo , Gabriela Izane de Almeida Campos , Rafael Vitti Mota , Rayssa de Sousa Mouzinho , Raul Nunes de Carvalho Junior

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Observations and analysis of near-critical fuel injection 近临界燃油喷射的观察与分析

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-13 DOI: 10.1016/j.supflu.2025.106549

Z. Alexander , T. Krause , N. Ly , U. Hegde , M. Hicks , M. Ihme

{"title":"Observations and analysis of near-critical fuel injection","authors":"Z. Alexander , T. Krause , N. Ly , U. Hegde , M. Hicks , M. Ihme","doi":"10.1016/j.supflu.2025.106549","DOIUrl":"10.1016/j.supflu.2025.106549","url":null,"abstract":"<div><div>Results from a study of n-heptane jets injected into a nitrogen environment under supercritical pressures with respect to n-heptane are presented. The temperature of the injected jet varies from supercritical to subcritical values (with respect to the n-heptane critical temperature) while the ambient environment is maintained at temperatures above the critical temperature of n-heptane. Three types of jets are observed and described: (1) subcritical, where the liquid/gas interface persists until complete evaporation of the liquid phase (2) supercritical, where there is no sharp interface between the injected jet and the ambient gas, and (3) transcritical, where distinct liquid/gas phase interface exists at injection but disappears before complete evaporation of the liquid. The subcritical and transcritical jets exhibit Rayleigh-Plateau instability where the jet breaks up into droplets. For subcritical jets, the droplets maintain their sharp interface whereas for the transcritical case the droplets transition from evaporative mixing to diffusive mixing with the surrounding fluid. The experiments are conducted under microgravity conditions at the Zero-Gravity Facility at NASA Glenn Research Center to minimize effects of buoyancy. To interpret these observations, the evolution of a transitioning droplet is modeled with a Regularized Interface Method that can describe both subcritical and supercritical processes as well as transcritical dynamics. Model predictions of critical transition are compared with experimental results and show good agreement.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"220 ","pages":"Article 106549"},"PeriodicalIF":3.4,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454911","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}

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Enhanced separation of valuable compounds from Spirulina using supercritical carbon dioxide: Influence of pretreatments and co-solvent addition on composition and bioactivity of extracts 超临界二氧化碳强化螺旋藻中有价化合物的分离：预处理和助溶剂添加对萃取物组成和生物活性的影响

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-10 DOI: 10.1016/j.supflu.2025.106545

Stoja Milovanovic , Agnieszka Grzegorczyk , Łukasz Świątek , Katarzyna Tyśkiewicz , Marcin Konkol , Dusica Stojanovic

{"title":"Enhanced separation of valuable compounds from Spirulina using supercritical carbon dioxide: Influence of pretreatments and co-solvent addition on composition and bioactivity of extracts","authors":"Stoja Milovanovic , Agnieszka Grzegorczyk , Łukasz Świątek , Katarzyna Tyśkiewicz , Marcin Konkol , Dusica Stojanovic","doi":"10.1016/j.supflu.2025.106545","DOIUrl":"10.1016/j.supflu.2025.106545","url":null,"abstract":"<div><div>There is a lack of information on pretreatments that improve the separation of biologically valuable extracts from <em>Spirulina</em> using supercritical carbon dioxide (scCO<sub>2</sub>). Therefore, this study was focused on testing microwave irradiation and rapid gas decompression pretreatments for the recovery of <em>Spirulina</em> extracts that express antioxidant, antimicrobial, and cytotoxic activity. Extractions from native and pretreated microalgae were performed using scCO<sub>2</sub> at 40 MPa and 40 °C, without or with ethanol as a co-solvent. Results revealed that the extraction process was positively influenced to some extent by the application of each pretreatment and co-solvent addition. Specifically, extraction yield was improved up to 8.7-fold, separation of γ-linolenic acid increased from 7.3% to 35.6 %, chlorophyll A content increased from 12.1 to 272.1 mg/g extract, and tocopherol amount rose from 1.3 to 24.7 mg α-TE/g dry biomass. On the other hand, separations performed with co-solvent decreased the content of carotenoids from 100.2 to 35.6 mg/g as well as the antioxidant activity of extracts and their cytotoxicity on human hypopharyngeal squamous cell carcinoma. Moreover, the addition of ethanol to scCO<sub>2</sub> had an adverse effect on the flavonoid content (which ranged from 45.8 to 82.4 mg RE/g) and the antimicrobial activity of extracts against 32 microbial strains. This exploratory study provides guidelines for the design, operation, and intensification of an environmentally friendly separation of added-value <em>Spirulina</em> extracts.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"220 ","pages":"Article 106545"},"PeriodicalIF":3.4,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395138","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}

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Measurement of phase transition, density and viscosity of supercritical carbon dioxide-Fischer-Tropsch wax mixtures 超临界二氧化碳-费托蜡混合物的相变、密度和粘度的测量

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-10 DOI: 10.1016/j.supflu.2025.106546

Andri Swanepoel , Philip W. Labuschagne , Cara E. Schwarz

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