Journal of Supercritical Fluids最新文献_第2页

Hydrolysis kinetics and structure characterization of ball milled bamboo impregnated with various diluted acids 不同稀释酸浸渍球磨竹的水解动力学及结构表征

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-05-13 DOI: 10.1016/j.supflu.2025.106648

Wei Yang , Cong Cong Wang , Lingjun Wang , Li Bao , Fan Yang , Shengji Wu , Lei Che

{"title":"Hydrolysis kinetics and structure characterization of ball milled bamboo impregnated with various diluted acids","authors":"Wei Yang , Cong Cong Wang , Lingjun Wang , Li Bao , Fan Yang , Shengji Wu , Lei Che","doi":"10.1016/j.supflu.2025.106648","DOIUrl":"10.1016/j.supflu.2025.106648","url":null,"abstract":"<div><div>The hydrolysis mechanism of ball milled bamboo impregnated with deionized water (B-ball), H<sub>2</sub>SO<sub>4</sub> (B-H<sub>2</sub>SO<sub>4</sub>), HCl (B-HCl) and CH<sub>3</sub>COOH (B-CH<sub>3</sub>COOH) in subcritical water was investigated in the present study. Various mechanochemical reactions were induced during acid-associated mechanical milling and bamboo with improved solubility, reduced thermal stability and solubility was obtained. Acid-associated mechanical treatment also significantly affected the hydrolysis behavior of bamboo in subcritical water. The hydrolysis kinetics of pretreated bamboo could be well expressed by the Coats-Redfern method. The acid strength dominated the hydrolysis of bamboo during ball milling and subcritical water treatment. H<sub>2</sub>SO<sub>4</sub> and HCl possessed the highest ability to dissociate the glycosidic bond and holocellulose-lignin chemical linkages. The above ability, together with their catalytic effects resulted in the lower activation energies required to initiate the hydrolysis of B-H<sub>2</sub>SO<sub>4</sub> (38.87 kJ mol<sup>−1</sup>) and B-HCl (38.23 kJ mol<sup>−1</sup>) compared with those of raw bamboo (74.34 kJ mol<sup>−1</sup>), B-ball (104.42 kJ mol<sup>−1</sup>) and B-CH<sub>3</sub>COOH (90.65 kJ mol<sup>−1</sup>) in subcritical water. The cleavage of holocellulose-lignin chemical linkages liberated the polycondensation of monomer and hydrolysable oligomers from holocellulose for glucose char and aromatic-linked polymer char production, leading to the increase of solid residue yield at elevated reaction temperature. It also promoted the glycosidic bond cleavage and ring scission reactions during hydrolysis in subcritical water, resulting in the improved yields of carbohydrate, 5-hydroxymethylfurfural and furfural.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"224 ","pages":"Article 106648"},"PeriodicalIF":3.4,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069247","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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A review of corrosion and protection of alloys in supercritical carbon dioxide power cycles: From the perspectives of corrosion simulation, dynamic simulation to experimental research 超临界二氧化碳动力循环中合金腐蚀与防护研究综述：从腐蚀模拟、动态模拟到实验研究的角度

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-05-10 DOI: 10.1016/j.supflu.2025.106647

Zhiyuan Liang, Tingshan Guo, Qinxin Zhao

{"title":"A review of corrosion and protection of alloys in supercritical carbon dioxide power cycles: From the perspectives of corrosion simulation, dynamic simulation to experimental research","authors":"Zhiyuan Liang, Tingshan Guo, Qinxin Zhao","doi":"10.1016/j.supflu.2025.106647","DOIUrl":"10.1016/j.supflu.2025.106647","url":null,"abstract":"<div><div>The carburization and corrosion resistance of heat-resistant materials are crucial for enhancing the safety of supercritical CO<sub>2</sub> renewable energy power system. Addressing the compatibility issues between heat-resistant materials and supercritical CO<sub>2</sub>, this review focuses on material selection, corrosion failure mechanisms, and surface strengthening methods, encompassing both experimental characterization and simulation calculations. The corrosion resistance of heat-resistant materials is predominantly governed by their intrinsic properties, particularly the Cr content. Stress loading aggravates the ion diffusion and carburization rates of heat-resistant materials. Although impurity gases accelerate corrosion rates, temperature remains the primary factor controlling ionic diffusion kinetics. Pre-forming protective oxide layers through surface modification can significantly enhance corrosion resistance. The continuous and dense Cr<sub>2</sub>O<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub> and SiO<sub>2</sub> oxide films hinder the ion diffusion and significantly reduce the carburization and corrosion rates of heat-resistant materials. However, corrosion testing alone provides limited mechanistic insights, whereas computational simulations offer valuable understanding of gas adsorption and initial oxidation behavior in these materials. Machine learning can reduce the influence of test equipment, environment, and operation, improving the systematic and universal applicability of high-temperature corrosion test results. Future research should focus on conducting experiments and simulations of high-temperature corrosion and corrosion fatigue under variable supercritical CO<sub>2</sub> load conditions.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"224 ","pages":"Article 106647"},"PeriodicalIF":3.4,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107320","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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New phase diagrams with anomalous region, supercritical solid-like state, liquid phase boundary, and dwij point 具有异常区、超临界类固态、液相边界和dwij点的新相图

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-05-10 DOI: 10.1016/j.supflu.2025.106644

Vish Prasad , Guo-Xiang Wang , Raad S. Haque , Laura M. Almara

{"title":"New phase diagrams with anomalous region, supercritical solid-like state, liquid phase boundary, and dwij point","authors":"Vish Prasad , Guo-Xiang Wang , Raad S. Haque , Laura M. Almara","doi":"10.1016/j.supflu.2025.106644","DOIUrl":"10.1016/j.supflu.2025.106644","url":null,"abstract":"<div><div>A Gibbs free energy-based thermodynamic analysis for regular fluids reveals the extension of liquid-vapor (L-V) line, beyond the critical point, to a newly discovered “Dwij point” (DP). At DP, this line turns around and goes back to the melt-solid (S-L) boundary, which together with the S-L and L-V lines delimits the region of liquid/supercritical liquid-like (L/SCLL) state. Consequently, a thermodynamic “solid-like” state is identified, which exists between the L/SCLL and melt-solid lines. Moreover, beyond DP only two phases, gas and solid exist, with the transition occurring via supercritical gas-like and solid-like states. These findings, in conjunction with the anomalous region around the critical point lead to historic modifications to the phase diagram. Consequently, the new phase diagrams for nine fluids are presented. Although the extension of supercritical liquid-like/gas-like boundary for hydrogen is similar, variations do exist. These discoveries may reconcile the thermodynamic transitions and dynamic transitions, which occur beyond DP.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"224 ","pages":"Article 106644"},"PeriodicalIF":3.4,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084504","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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On extinction of hydrothermal flames in laminar reactive jets 层流反应射流中热液火焰的熄灭研究

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-05-07 DOI: 10.1016/j.supflu.2025.106642

Peter V. Gordon , Uday G. Hegde , Michael C. Hicks

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Enzymatic ring-opening polymerization of lactones in supercritical carbon dioxide: A review 超临界二氧化碳催化内酯开环聚合研究进展

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-05-05 DOI: 10.1016/j.supflu.2025.106645

Roseny D. Santos , Evertan A. Rebelatto , Diego A. Mayer , J. Vladimir Oliveira

{"title":"Enzymatic ring-opening polymerization of lactones in supercritical carbon dioxide: A review","authors":"Roseny D. Santos , Evertan A. Rebelatto , Diego A. Mayer , J. Vladimir Oliveira","doi":"10.1016/j.supflu.2025.106645","DOIUrl":"10.1016/j.supflu.2025.106645","url":null,"abstract":"<div><div>The polymerization of lactones has revealed the potential of polylactones for preparing biomaterials with attractive properties for biomedical applications. The use of green solvents and biocatalysts are fundamental steps towards the circularity of the synthesis of these polymers. Supercritical carbon dioxide has emerged as a green solvent for a variety of processes due to its hybrid liquid-gas properties, non-toxicity, and reusability. Novozym® 435 is the most widely used enzyme due to its excellent stability under high pressure. However, the high cost of this lipase is one of the limiting factors for its expansion to an industrial scale. The enzymatic polymerization of lactones in supercritical carbon dioxide is a promising technique for the production of high molar mass polyesters, although it presents challenges in becoming a completely green process. Thus, this work aims to provide an overview of the enzymatic polymerization of lactones in supercritical carbon dioxide, including the compilation and discussion of the developed research up to date. This review also presents the main challenges to overcome for the progress of this technology. In the future perspective, searching for cheaper enzymes and the development of an integrated process that allows the reuse of both the enzyme and CO<sub>2</sub> should be part of the research in the coming years. Furthermore, the synthesis of copolyesters employing this biosynthetic route is also a field to be explored, since the easy manipulation of the reaction conditions can offer a wider range of customized polymeric materials.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"224 ","pages":"Article 106645"},"PeriodicalIF":3.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927401","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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Targeting metastatic melanoma: Pumpkin seed extracts as potential antineoplastic agents 靶向转移性黑色素瘤：南瓜籽提取物作为潜在的抗肿瘤药物

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-04-29 DOI: 10.1016/j.supflu.2025.106643

Bruno Antônio Amarante , Eduardo Saccomori , Denise Bilibio , João Paulo Bender , Gilnei Bruno da Silva , Daiane Manica , Margarete Dulce Bagatini , Alessandra Nejar Bruno , Wagner Luiz Priamo

{"title":"Targeting metastatic melanoma: Pumpkin seed extracts as potential antineoplastic agents","authors":"Bruno Antônio Amarante , Eduardo Saccomori , Denise Bilibio , João Paulo Bender , Gilnei Bruno da Silva , Daiane Manica , Margarete Dulce Bagatini , Alessandra Nejar Bruno , Wagner Luiz Priamo","doi":"10.1016/j.supflu.2025.106643","DOIUrl":"10.1016/j.supflu.2025.106643","url":null,"abstract":"<div><div>In this study, the fatty acid composition and antitumor potential of pumpkin seed extracts, obtained through ultrasound-assisted extraction (UAE) and pressurized ethanol extraction (PEE) against melanoma cells was studied. An experimental design was employed to optimize parameters in both methods and gas chromatography identified the extracts based on fatty acids. SK-MEL-28 and A375 melanoma cells were treated with UAE and PEE extracts and assessed for viability (MTT assay, acridine orange staining), redox profile (NOx, PSH, NPSH), and mitochondrial membrane potential (MMP). The highest extraction yields were 48.99 % for UAE and 30.28 % for PEE. Major fatty acids included methyl linoleate (∼ 47 %) and methyl cis-9 oleate (∼ 25 %). Extracts reduced melanoma cell viability, increased NOx, and decreased MMP, particularly with UAE-derived extracts, highlighting the significance of the extraction method. These effects may be linked to altered redox balance, reduced MMP, and tumor cell death.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"223 ","pages":"Article 106643"},"PeriodicalIF":3.4,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918222","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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Extraction of β-carotene and lipids from wet biomass of the oleaginous yeast Rhodosporidium toruloides with supercritical CO2 超临界CO2从产油酵母红孢子虫湿生物质中提取β-胡萝卜素和脂质

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-04-24 DOI: 10.1016/j.supflu.2025.106641

Vanessa Buchweitz, Kilian Jörg, Jelena Pajnik, Mirjana Minceva

{"title":"Extraction of β-carotene and lipids from wet biomass of the oleaginous yeast Rhodosporidium toruloides with supercritical CO2","authors":"Vanessa Buchweitz, Kilian Jörg, Jelena Pajnik, Mirjana Minceva","doi":"10.1016/j.supflu.2025.106641","DOIUrl":"10.1016/j.supflu.2025.106641","url":null,"abstract":"<div><div>The present study investigated supercritical CO<sub>2</sub> extraction (SCE) of β-carotene and lipids from wet biomass of the oleaginous yeast <em>Rhodosporidium toruloides</em> to assess its potential as a green and energy-effective extraction process. The influence of the water content of the biomass on the extraction kinetics was investigated by performing SCE with biomass with different water contents (80.3 wt%, 40 wt%, and 3 wt%). The CO<sub>2</sub> flowrate was set to 0.240 g s<sup>−1</sup>. Despite an initial delay in the extraction process, the extraction yields from wet and dried biomass after 195 min (50 °C and 250 bar) showed no significant difference, confirming that an energy-intensive drying step before extraction can be avoided. The effects of temperature (40 °C - 70 °C) and pressure (200 bar - 400 bar) on extraction kinetics were systematically studied. Ethanol as a co-solvent significantly improved extraction efficiency, increasing β-carotene yield (up to 77 %) and lipid yield (up to 49 %). Yeast intracellular lipids were proven to act as an effective natural co-solvent for β-carotene extraction, as evidenced by the significant improvement in β-carotene recovery by 63 % when 10 wt% sunflower oil was added to the wet biomass as a co-solvent. The fatty acid methyl esters (FAME) analyses showed that the extraction conditions did not influence the FAME composition. The obtained extracts exhibited notable antioxidant activity, with an IC<sub>50</sub> of approximately 2 mg mL<sup>−1</sup>, highlighting the potential of the oleaginous yeast <em>Rhodosporidium toruloides</em> as a valuable source for applications in functional foods and pharmaceutical products.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"223 ","pages":"Article 106641"},"PeriodicalIF":3.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876828","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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Advances in supercritical fluid chromatography for lipid analysis and purification – A review of the past decade 超临界流体色谱法用于脂质分析和纯化的研究进展

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-04-23 DOI: 10.1016/j.supflu.2025.106638

Lou Spanneut , Thibaut Devièse

{"title":"Advances in supercritical fluid chromatography for lipid analysis and purification – A review of the past decade","authors":"Lou Spanneut , Thibaut Devièse","doi":"10.1016/j.supflu.2025.106638","DOIUrl":"10.1016/j.supflu.2025.106638","url":null,"abstract":"<div><div>This review explores the advances in Supercritical Fluid Chromatography (SFC) for the analysis and purification of lipids achieved over the past decade. Lipidomics has become an essential tool in numerous fields such as biology and food science. Compared to liquid and gas chromatography, SFC, which utilizes supercritical CO₂ as a mobile phase, offers faster analysis, reduced solvent use, and improved separation of complex lipidic substances. This review synthesizes findings from over 80 studies, evaluating various stationary phases, retention mechanisms, and optimized conditions for both lipid class and intra-class separations. It provides detailed comparisons of columns for different lipid types, such as fatty acids, glycerolipids, and phospholipids, and explores preparative-scale applications for bioactive lipid purification, including omega-3 fatty acids and sterols. By consolidating this knowledge, this review will serve as a practical guide for chemists to select optimal columns and conditions without extensive testing, thereby streamlining method development and reducing costs.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"223 ","pages":"Article 106638"},"PeriodicalIF":3.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891685","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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Green preparation of lightweight and elastic poly (butylene adipate-co-terephthalate)/thermoplastic polyamide elastomer composite foams 绿色制备轻质弹性聚己二酸丁二酯/热塑性聚酰胺弹性体复合泡沫

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-04-21 DOI: 10.1016/j.supflu.2025.106635

Xuelin Zhang, Peiying Yue, Xiulu Gao, Yichong Chen, Ling Zhao, Dongdong Hu

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Melting point depression of tetrabutylammonium halides in supercritical carbon dioxide 超临界二氧化碳中四丁基卤化铵熔点的降低

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-04-17 DOI: 10.1016/j.supflu.2025.106637

Dóra Arany, Márton Kőrösi

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