Journal of Supercritical Fluids最新文献_第3页

Araçaúna (Psidium myrtoides) flour: Sequential extraction with supercritical carbon dioxide and pressurized fluids Araçaúna（山慈姑）面粉：用超临界二氧化碳和加压流体进行顺序提取

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-11-12 DOI: 10.1016/j.supflu.2024.106457

Yaneth Machaca Monroy , Patrícia Berilli , Sara Fraga , Adilson Sartoratto , Marili Villa Nova Rodrigues , Gerardo Fernández Barbero , Antonio José de Almeida Meirelles , Guilherme José Máximo , Mário Roberto Maróstica Júnior , Klicia Araujo Sampaio

{"title":"Araçaúna (Psidium myrtoides) flour: Sequential extraction with supercritical carbon dioxide and pressurized fluids","authors":"Yaneth Machaca Monroy , Patrícia Berilli , Sara Fraga , Adilson Sartoratto , Marili Villa Nova Rodrigues , Gerardo Fernández Barbero , Antonio José de Almeida Meirelles , Guilherme José Máximo , Mário Roberto Maróstica Júnior , Klicia Araujo Sampaio","doi":"10.1016/j.supflu.2024.106457","DOIUrl":"10.1016/j.supflu.2024.106457","url":null,"abstract":"<div><div>Araçaúna (<em>Psidium myrtoides</em>) is a native fruit from the Brazilian Atlantic Forest. It was studied for the proximate composition of its flour and sequential extraction using supercritical fluid extraction (SFE) in the first stage with CO<sub>2</sub> and pressurized liquid extraction (PLE) with ethanol and water in the second and third stages, respectively, at 50°C and 60°C. The proximate analysis revealed essential information about the flour regarding the content of protein, carbohydrates, lipid, ash and moisture. The sequential extraction at 60°C resulted in high yields (42.22 %). The first stage using SFE captured the volatile fraction, notably 1,4-diethylbenzene, which corresponds to 53.70 % of the total volatile compounds identified in the araçaúna. Comparing the second and third stages, the third stage with water at 50°C produced the highest levels of phenolic compounds (33.06±2.26 mg GAE/g extract), total monomeric anthocyanins (3.91±2.10 mg C3G/g extract), antioxidant activity by ORAC (415.13±13.66 µmol TE/g extract) and FRAP (747.16±18.49 µmol TE/g extract), and cyanidin-3-glucoside as the predominant compound (4.83 % w/w).</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"217 ","pages":"Article 106457"},"PeriodicalIF":3.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700127","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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High-purity κ-carrageenan from Kappaphycus alvarezii algae for aerogel production by supercritical CO2 drying 利用超临界二氧化碳干燥法生产气凝胶的高纯度κ-卡拉胶藻藻胶

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-11-12 DOI: 10.1016/j.supflu.2024.106454

Adenilson Renato Rudke , Cristiano José de Andrade , Sandra Regina Salvador Ferreira

{"title":"High-purity κ-carrageenan from Kappaphycus alvarezii algae for aerogel production by supercritical CO2 drying","authors":"Adenilson Renato Rudke , Cristiano José de Andrade , Sandra Regina Salvador Ferreira","doi":"10.1016/j.supflu.2024.106454","DOIUrl":"10.1016/j.supflu.2024.106454","url":null,"abstract":"<div><div>Carrageenan, a polysaccharide mostly extracted from <em>Kappaphycus alvarezii</em> (KA), is valuable for cosmetic and food uses due to large quantities of κ-carrageenan. High-pressure sequential extractions can recover high-purity carrageenan from KA, adequate for aerogel production. The biopolymer properties such as size, shape, and sulphate groups affect the gel form and aerogel characteristics. In this work, aerogels were obtained by supercritical CO<sub>2</sub> drying, and cryogels by freeze-drying, using high-purity carrageenan, recovered by sequential high-pressure extractions (HP), and commercial carrageenan (CC). The results indicated that HP samples showed higher volumetric shrinkage (96 %), firmness (254 N), and envelope density (0.008 g.cm<sup>−3</sup>) compared to CC samples. Aerogels presented characteristics of pore volume, surface area, and density suggesting supercritical drying as feasible method to produce porous materials. Besides, the aerogels present valuable properties compared to cryogel, including high firmness, useful for applications in packages, scaffolds, or delivery systems, a tendency that must be increasingly explored.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"217 ","pages":"Article 106454"},"PeriodicalIF":3.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142696362","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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Flow mechanism and back gap windage loss of a sCO2 radial inflow turbine with impeller scallops 带扇贝叶轮的 sCO2 径向流入涡轮机的流动机制和背隙风蚀损失

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-11-08 DOI: 10.1016/j.supflu.2024.106453

Zhuobin Zhao , Jianxin Liao , Qinghua Deng , Jun Li , Zhenping Feng

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Supercritical CO2 assisted bioMOF drug encapsulation and functionalization for delivery with a synergetic therapeutic value 超临界二氧化碳辅助生物MOF药物封装和功能化，实现具有协同治疗价值的递送

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-11-05 DOI: 10.1016/j.supflu.2024.106452

Albert Rosado , Luis García-Fernández , María Rosa Aguilar , Rosa Ana Ramírez , Ana M. López-Periago , José A. Ayllón , Concepción Domingo

{"title":"Supercritical CO2 assisted bioMOF drug encapsulation and functionalization for delivery with a synergetic therapeutic value","authors":"Albert Rosado , Luis García-Fernández , María Rosa Aguilar , Rosa Ana Ramírez , Ana M. López-Periago , José A. Ayllón , Concepción Domingo","doi":"10.1016/j.supflu.2024.106452","DOIUrl":"10.1016/j.supflu.2024.106452","url":null,"abstract":"<div><div>Despite the impressive characteristics of biological metal organic frameworks (bioMOFs) for their use as drug delivery systems (DDs), there are still some parameters related to their structural stability and processing routes that have decelerated their realistic application in this field. Both drawbacks are unraveled in this work for the microporous bioMOF CaSyr-1 by using supercritical CO<sub>2</sub> (scCO<sub>2</sub>) to load the bioMOF with the anti-tubercular isoniazid (INH) drug, and functionalize its external surface with a hydrophobic protective layer of stearate (S). The hydrophobicized CaSyr-1(INH)/S vehicle is further coated with a neutral surfactant (PS60) to enhance the wettability of the system. <em>In vitro</em> tests, related to drug carrier biocompatibility and drug release in body simulated fluids, are performed to demonstrate potential prospective of the designed DDs in pharmacy. The synthetized product displayed total biocompatibility even at high concentrations, and the particle size and dissolution rate showed to be adequate for pulmonary administration.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"216 ","pages":"Article 106452"},"PeriodicalIF":3.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660511","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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Supercritical CO2 green solvent extraction of Nepeta crispa: Evaluation of process optimization, chemical analysis, and biological activity 超临界二氧化碳绿色溶剂萃取脆山羊：工艺优化、化学分析和生物活性评估

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-11-04 DOI: 10.1016/j.supflu.2024.106451

Saeid Matinfard , Hamid Tavakolipour , Gholamhossein Sodeifian , Seyed Ali Sajadian , Ramezan Kalvandi

{"title":"Supercritical CO2 green solvent extraction of Nepeta crispa: Evaluation of process optimization, chemical analysis, and biological activity","authors":"Saeid Matinfard , Hamid Tavakolipour , Gholamhossein Sodeifian , Seyed Ali Sajadian , Ramezan Kalvandi","doi":"10.1016/j.supflu.2024.106451","DOIUrl":"10.1016/j.supflu.2024.106451","url":null,"abstract":"<div><div>This research investigates the extraction of compounds from <em>Nepeta crispa</em> (<em>N. crispa</em>), utilizing supercritical carbon dioxide green solvent, for the first time. Using RSM, the study examines the impact of pressure (15–25 MPa), temperature (313–333 K), and co-solvent (0.5–3.5%) on the extraction yield. The antioxidant activity of the essential oil is assessed through Ferric Reducing Antioxidant Power (FRAP) assay, while its antibacterial properties are evaluated against four bacterial strains. The SCFE method achieved a maximum yield of 1.812 % at optimum conditions (P= 25 MPa, T= 313 K and co-solvent= 3.5%). GC-Mass analysis revealed that the primary constituents of <em>N. crispa</em> essential oil which are 1,8-cineol and 4aα,7α,7aα-nepetalactone in both extraction methods. The antioxidant and antibacterial results of <em>N. crispa</em> showed the superiority of SC-CO<sub>2</sub> over hydrodistillation method. These observed antioxidant and antibacterial attributes highlight the plant’s potential suitability for applications within the food and pharmaceutical industries.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"216 ","pages":"Article 106451"},"PeriodicalIF":3.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660691","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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Impact of cold source temperature on transcritical CO2 power cycle: Design point optimization and off-design performance analysis

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-10-31 DOI: 10.1016/j.supflu.2024.106450

Xingyan Bian, Xuan Wang, Xuanang Zhang, Rui Wang, Jingyu Wang, Hua Tian, Gequn Shu

{"title":"Impact of cold source temperature on transcritical CO2 power cycle: Design point optimization and off-design performance analysis","authors":"Xingyan Bian, Xuan Wang, Xuanang Zhang, Rui Wang, Jingyu Wang, Hua Tian, Gequn Shu","doi":"10.1016/j.supflu.2024.106450","DOIUrl":"https://doi.org/10.1016/j.supflu.2024.106450","url":null,"abstract":"The transcritical CO<ce:inf loc=\"post\">2</ce:inf> (T-CO<ce:inf loc=\"post\">2</ce:inf>) power cycle is regarded as one of the most promising alternatives to the steam power cycle in nuclear power plants. However, these plants often operate with transient cold source conditions, leading to deviations from the optimal design point and performance degradation. Therefore, this study examines a double recompression T-CO<ce:inf loc=\"post\">2</ce:inf> power cycle to optimize the design point pump inlet temperature and investigate part-load performance under cold source fluctuations. Results indicate that the lowest design point pump inlet temperature is optimal for low temperature cold sources and high load conditions to maximize thermal efficiency. When the system operates at 80 % load with a cold source temperature of 5 °C, the thermal efficiencies at the design point pump inlet temperature of 15 °C and 25 °C are 58 % and 56.93 %, respectively. In contrast, a moderate design point pump inlet temperature is better suited for accommodating wide fluctuations in operating conditions. A lower cold source temperature helps mitigate the reduction in thermal efficiency caused by load decreases. Furthermore, reducing the split ratio of low-temperature compressor can enhance thermal efficiency as the cold source temperature increases. These findings provide an effective approach to minimizing performance degradation in the T-CO<ce:inf loc=\"post\">2</ce:inf> power cycle under off-design conditions.","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"13 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789994","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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Study on the crosslinking reaction and foaming behavior of silicone rubber in high-pressure fluids 硅橡胶在高压流体中的交联反应和发泡行为研究

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-10-30 DOI: 10.1016/j.supflu.2024.106449

Bo Wang, Wanyu Tang, Zuoze Fan, Ruyun Xu, Guangxian Li, Xia Liao

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Subcritical water hydrolysis of soybean hulls pretreated by steam explosion: High pressure integrated process strategy 经蒸汽爆炸预处理的大豆壳的亚临界水水解：高压综合工艺战略

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Journal of Supercritical Fluids Pub Date : 2024-10-29 DOI: 10.1016/j.supflu.2024.106448

Crisleine P. Draszewski, Bruna C. Witter, Pedro A. Assini, Flávio D. Mayer, Ederson R. Abaide, Fernanda de Castilhos

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An experimental methodology to validate the use of hydroethanolic mixtures as suspending medium / modifier for the supercritical CO2 extraction of suspensions 验证水乙醇混合物作为悬浮介质/改性剂用于超临界二氧化碳萃取悬浮液的实验方法

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-10-28 DOI: 10.1016/j.supflu.2024.106423

Marco Antonio Mamani , José Manuel del Valle , Paulo Aravena , Roberto Canales

{"title":"An experimental methodology to validate the use of hydroethanolic mixtures as suspending medium / modifier for the supercritical CO2 extraction of suspensions","authors":"Marco Antonio Mamani , José Manuel del Valle , Paulo Aravena , Roberto Canales","doi":"10.1016/j.supflu.2024.106423","DOIUrl":"10.1016/j.supflu.2024.106423","url":null,"abstract":"<div><div>We developed a methodology to study the extraction of high-value solutes directly from suspensions of finely disrupted substrates. For that, we modelled the high-pressure phase equilibrium for the ternary (CO<sub>2</sub> + ethanol + water) system using experimental literature data. Different compositions of hydroethanolic mixture and CO<sub>2</sub> were loaded into an extraction vessel set at 30–35 MPa and 40–50 °C during static extraction, and a gaseous mixture with the composition of the CO<sub>2</sub>-rich gaseous phase in the extraction vessel was continuously fed during dynamic extraction. Losses of the fed hydroethanolic mixture occurred mainly during dynamic extraction (10–30 wt%) and were properly distributed to account for actual flows and compositions of experimental streams. Mostly, equilibrium conditions were reached following about 1 h of the 2-h dynamic extraction, and good reproducibility was achieved. In conclusion, equilibrium is reached in which two phases coexist in equilibrium within the extraction vessel: a water-rich liquid phase and a CO<sub>2</sub>-rich gaseous phase.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"216 ","pages":"Article 106423"},"PeriodicalIF":3.4,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660692","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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Effect of supercritical CO2 impregnation of piperine and black pepper extract on properties of poly(l-lactic acid) films 胡椒碱和黑胡椒提取物的超临界二氧化碳浸渍对聚（l-乳酸）薄膜性能的影响

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-10-28 DOI: 10.1016/j.supflu.2024.106441

Gricielle A. Sutil , Kátia S. Andrade , Evertan A. Rebelatto , Marcelo Lanza

{"title":"Effect of supercritical CO2 impregnation of piperine and black pepper extract on properties of poly(l-lactic acid) films","authors":"Gricielle A. Sutil , Kátia S. Andrade , Evertan A. Rebelatto , Marcelo Lanza","doi":"10.1016/j.supflu.2024.106441","DOIUrl":"10.1016/j.supflu.2024.106441","url":null,"abstract":"<div><div>The impregnation of piperine and black pepper extract into poly (L-lactic acid) (PLLA) films using supercritical CO<sub>2</sub> was investigated. Piperine was a model to determine the influence of operating conditions of pressure (10 and 12 MPa) and temperature (40 and 50 °C) on the impregnation yield. The most favorable conditions were obtained at 10 MPa and 50 °C and were used in the incorporation of piperine and black pepper extract into 200 µm films. The addition of 5 and 10 % ethanol as cosolvent was tested during the impregnation processes of black pepper extract and piperine. The impregnated films were characterized on their thermal, mechanical, structural and surface properties. The addition of 5 % cosolvent favored the increase in piperine yield (5.6 %). The impregnation of piperine and extract using co-solvent led to an increase in the crystallinity of the films and significant changes in the mechanical properties. Supercritical technology has shown promise for the impregnation of active agents into PLLA films for potential development in food packaging applications.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"216 ","pages":"Article 106441"},"PeriodicalIF":3.4,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578955","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