Journal of Supercritical Fluids最新文献_第6页

Study of potassium deactivation rule in supercritical water gasification of coal with K2CO3 as catalyst 以 K2CO3 为催化剂的超临界水煤气化过程中钾失活规律研究

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Journal of Supercritical Fluids Pub Date : 2024-08-12 DOI: 10.1016/j.supflu.2024.106375

Chenchen Zhou, Hui Jin, Zhiwei Ge, Liejin Guo

{"title":"Study of potassium deactivation rule in supercritical water gasification of coal with K2CO3 as catalyst","authors":"Chenchen Zhou, Hui Jin, Zhiwei Ge, Liejin Guo","doi":"10.1016/j.supflu.2024.106375","DOIUrl":"10.1016/j.supflu.2024.106375","url":null,"abstract":"<div>K2CO3 has a good catalytic effect in supercritical water gasification (SCWG) of coal. However, researchers have mainly focused on the effects of coal gasification, while the potassium mass transfer process has rarely been studied. Herein, the distribution pattern of potassium during the SCWG of coal and the factors influencing potassium deactivation were experimentally obtained. Through the detection and analysis of the residues after the SCWG of coal, it is found that potassium only exists in the forms of liquid and solid and the potassium in the residue exists in the form of insoluble potassium silica alumina, which does not have a catalytic effect. At a high reaction temperature, the reaction time is longer, and when the silica–aluminum content in coal is higher, the potassium deactivate rate is also higher. The molar contents of potassium and aluminum in the coal gasification residue are linearly correlated, with a ratio of approximately 1:1. Reducing the aluminum content in coal can effectively reduce potassium deactivation. In the SCWG of the Hebi coal, the deactivation rate of potassium reduced from 80.88 % to 17.75 % after acid washing. In the SCWG of the ash-free coal, the carbon gasification efficiency (CE) and potassium content in the liquid were above 95 % after each experiment, there was no deactivation of potassium, and the residual potassium solution remained catalytically effective after the SCWG of the ash-free coal.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"214 ","pages":"Article 106375"},"PeriodicalIF":3.4,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141978449","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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Density and viscosity of orange peel oil saturated with pressurized CO2 加压二氧化碳饱和橙皮油的密度和粘度

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-08-08 DOI: 10.1016/j.supflu.2024.106373

Mariana Fortunatti-Montoya , Pablo E. Hegel , Selva Pereda

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Ultrasound pretreatment combined with supercritical CO2 extraction of Costus spicatus leaf extract 超声波预处理与超临界二氧化碳萃取相结合的木贼叶提取物

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-08-07 DOI: 10.1016/j.supflu.2024.106372

Thaíris Karoline Silva Laurintino , Thuany Naiara Silva Laurintino , Deise Parolo Tramontin , Alexandre Bella Cruz , Debora Wainstein Paiva , Ariovaldo Bolzan , Marintho Bastos Quadri

{"title":"Ultrasound pretreatment combined with supercritical CO2 extraction of Costus spicatus leaf extract","authors":"Thaíris Karoline Silva Laurintino , Thuany Naiara Silva Laurintino , Deise Parolo Tramontin , Alexandre Bella Cruz , Debora Wainstein Paiva , Ariovaldo Bolzan , Marintho Bastos Quadri","doi":"10.1016/j.supflu.2024.106372","DOIUrl":"10.1016/j.supflu.2024.106372","url":null,"abstract":"<div>This work aimed to obtain extracts from Costus spicatus leaves through ultrasonic pretreatment in supercritical CO2 extraction (UAE+SFE). A central composite design was used to evaluate the influence of temperature (36–64 °C), pressure (8–20 MPa), and cosolvent (0–20 %w) in terms of overall yield and chemical composition. Morphology using scanning electron micrograph (SEM), total phenolic content, content of total flavonoid, antioxidant (DPPH and ABTS), and antibacterial activities were evaluated. UAE+SFE showed a more notable overall yield, with 6.97 %. In the SEM, the sample treated with UAE+SFE significantly impacted tissue structures, improving the selectivity of SFE regarding linolenic acid, leading to a maximum composition value of 62.5 % area according to GC-MS. Furthermore, the UAE+SFE extract exhibited strong antimicrobial activity compared to the extract obtained by the SFE technique. Based on the pioneering results, the bioactives obtained are promising and interesting for application in the cosmetic, pharmaceutical, and food industries.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"213 ","pages":"Article 106372"},"PeriodicalIF":3.4,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141915316","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 mild subcritical fluid treatment on meat quality of farmed large yellow croakers 温和亚临界流体处理对养殖大黄鱼肉质的影响

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-08-05 DOI: 10.1016/j.supflu.2024.106370

Wenjie Wang , Danqing Jiang , Xiubiao Chen , Xuxia Zhou , Yuting Ding

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Investigation of supercritical CO2 corrosion behavior of X80 carbon steel in pipelines: An in situ experimental and DFT study 管道中 X80 碳钢的超临界二氧化碳腐蚀行为研究：现场实验和 DFT 研究

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-08-05 DOI: 10.1016/j.supflu.2024.106371

Xiaodan Wang , Pu Yang , Ruidong Li , Guohu Tong , Jukai Chen , Yueshe Wang

{"title":"Investigation of supercritical CO2 corrosion behavior of X80 carbon steel in pipelines: An in situ experimental and DFT study","authors":"Xiaodan Wang , Pu Yang , Ruidong Li , Guohu Tong , Jukai Chen , Yueshe Wang","doi":"10.1016/j.supflu.2024.106371","DOIUrl":"10.1016/j.supflu.2024.106371","url":null,"abstract":"<div>The electrochemical corrosion behavior of X80 carbon steel was investigated in a supercritical CO2 (sCO2) environment at 60 ℃ and 9 MPa, by in-situ experiments and density functional theory (DFT) calculations, revealing the corrosion mechanism. For in situ electrochemical measurements, two novel CO2-rich and H2O-rich cells were developed to replace the traditional three-electrode cell. Electrochemical impedance spectroscopy revealed distinct differences in the corrosion behavior between CO2-rich and H2O-rich environments during the later stages of testing. In H2O-rich environments, as corrosion time increased, the corrosion product layer gradually changed from porous to dense, eventually forming a protective layer. In CO2-rich environments, corrosion occurs mainly in areas where water condenses to form FeCO3. Simultaneously, microscopic calculations provided evidence for the three-step sCO2 hydrolysis mechanism and the formation of FeCO3 products.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"213 ","pages":"Article 106371"},"PeriodicalIF":3.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141915317","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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Solubility of supercritical CO2 in polystyrene 超临界二氧化碳在聚苯乙烯中的溶解度

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-08-03 DOI: 10.1016/j.supflu.2024.106374

Friso G. Versteeg, Guilherme de M.R. Lima, Francesco Picchioni, Pablo Druetta

{"title":"Solubility of supercritical CO2 in polystyrene","authors":"Friso G. Versteeg, Guilherme de M.R. Lima, Francesco Picchioni, Pablo Druetta","doi":"10.1016/j.supflu.2024.106374","DOIUrl":"10.1016/j.supflu.2024.106374","url":null,"abstract":"<div>Expanded polystyrene (ePS) plays an important role in the food packaging industry. However, the foaming process is environmentally unfriendly. A sustainable alternative is dissolving supercritical CO2 (scCO2) in the polystyrene (PS) matrix. Most studies so far were performed at temperatures above the PS glass transition temperature; however, a more general temperature window is desirable. In this work, the solubility of scCO2 in polystyrene was measured at 323 K, 343 K, 363 K and 383 K and pressure up to 130 bar using a magnetic suspension balance (MSB). It was concluded that the solubility of CO2 in PS decreases with temperature and increases with pressure. The Sanchez-Lacombe Equation of State was utilized to estimate the degree of swelling. The model developed was able to derive the experimentally determined solubilities after correction for the swelling. The interaction parameter, k12, turned out to be only a function of temperature. With these results the solubility and swelling of PS in scCO2 can be more accurately assessed for different temperatures and pressures.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"213 ","pages":"Article 106374"},"PeriodicalIF":3.4,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0896844624002092/pdfft?md5=216ec0599b69d6363ae8609ef674a44d&pid=1-s2.0-S0896844624002092-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141915325","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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Optimization of supercritical carbon dioxide pretreatment of Flaveria bidentis leaves prior extraction of sulfated flavonoids with subcritical water 在用亚临界水提取硫酸化黄酮类化合物之前，优化用超临界二氧化碳预处理黄花菜叶的方法

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Journal of Supercritical Fluids Pub Date : 2024-07-26 DOI: 10.1016/j.supflu.2024.106349

Paulina Falletti , María F. Barrera Vázquez , Pedro H. Santos , Luiz G. Gonçalves Rodrigues , Marcelo Lanza , Raquel E. Martini , Laura R. Comini

{"title":"Optimization of supercritical carbon dioxide pretreatment of Flaveria bidentis leaves prior extraction of sulfated flavonoids with subcritical water","authors":"Paulina Falletti , María F. Barrera Vázquez , Pedro H. Santos , Luiz G. Gonçalves Rodrigues , Marcelo Lanza , Raquel E. Martini , Laura R. Comini","doi":"10.1016/j.supflu.2024.106349","DOIUrl":"10.1016/j.supflu.2024.106349","url":null,"abstract":"<div>Flaveria bidentis is an invasive plant containing Sulfated Flavonoids (SFs) with therapeutic potential. The extraction of these compounds would add value to the biomass generated during weeding. This work reports the optimization of the pretreatment of F. bidentis leaves with supercritical CO2 (P-SC-CO2) prior extraction of these compounds using subcritical water extraction. The combined effect of different levels of the three factors on P-SC-CO2, Time, Pressure and Depressurization rate, was investigated with Response Surface Methodology. The optimal pretreatment conditions were as follows: Time = 30 min, Pressure = 30 MPa and Depressurization rate = 2 kg CO2/h. Under these conditions, 72.45 ± 0.99 mg of totals SFs/100 g of leaves was recovered, practically doubling total SFs extraction yield in the absence of pretreatment. In addition, the structural damage caused by P-SC-CO2 on the leaves was detected using Scanning Electron Microscopy.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"213 ","pages":"Article 106349"},"PeriodicalIF":3.4,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141851078","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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Compressed n-propane extraction of umari pulp oil: A rich Amazon source of β-carotene and omega-9 压缩正丙烷萃取乌玛里果肉油：亚马逊河流域β-胡萝卜素和欧米伽-9的丰富来源

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-07-26 DOI: 10.1016/j.supflu.2024.106369

Lucas Cantão Freitas , Manoel Benedito Sousa Cantão , Vanessa Souza Carvalho , Rogério Willian Silva dos Santos , Marcos Lúcio Corazza , Maria Lucia Masson

{"title":"Compressed n-propane extraction of umari pulp oil: A rich Amazon source of β-carotene and omega-9","authors":"Lucas Cantão Freitas , Manoel Benedito Sousa Cantão , Vanessa Souza Carvalho , Rogério Willian Silva dos Santos , Marcos Lúcio Corazza , Maria Lucia Masson","doi":"10.1016/j.supflu.2024.106369","DOIUrl":"10.1016/j.supflu.2024.106369","url":null,"abstract":"<div>Compressed n-propane extraction (CPE) was applied to umari fruit (Poraqueiba sericea Tul.) pulp to obtain an oil rich in high added-value components. CPE was performed at different temperatures and flow rate, which was compared to conventional extraction (Soxhlet). The oils were analyzed for global yields, fatty acid composition, β-carotene content, antioxidant activity, total phenolics content (TPC) total flavonoids (TF), and thermal behavior. The highest extraction yield (29.2 wt%) was obtained with CPE at 80 °C and 3 mL.min−1, being higher than that obtained by Soxhlet. The flow rate variation had a significant effect (p < 0.05) on the oil extraction yield, while the temperature had a negative effect. The umari oil obtained by CPE emerges as a rich source of oleic acid (omega-9) and β-carotene (vitamin A precursor), with potential to be applied in various industrial segments and inserted into the Amazon bioeconomy scenario.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"213 ","pages":"Article 106369"},"PeriodicalIF":3.4,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141849150","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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Decaffeination of yerba mate (Ilex paraguariensis) by pressurized liquid CO2 extraction: A feasible process? 用加压液体二氧化碳萃取法对耶巴马黛茶（Ilex paraguariensis）进行脱咖啡因处理：可行的工艺？

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-07-26 DOI: 10.1016/j.supflu.2024.106368

L.I. Granone , F.A. Sánchez , P. Hegel , S. Pereda

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Concentration of the oxyterpenes linalool and α-terpineol in orange peel oil by supercritical fluid adsorption 利用超临界流体吸附法浓缩橙皮油中的芳樟醇和α-松油醇

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-07-24 DOI: 10.1016/j.supflu.2024.106354

Victor Saldanha Carvalho , Francisco Manuel Barrales , Luiz Henrique Fasolin , Juliane Viganó , Julian Martínez

{"title":"Concentration of the oxyterpenes linalool and α-terpineol in orange peel oil by supercritical fluid adsorption","authors":"Victor Saldanha Carvalho , Francisco Manuel Barrales , Luiz Henrique Fasolin , Juliane Viganó , Julian Martínez","doi":"10.1016/j.supflu.2024.106354","DOIUrl":"10.1016/j.supflu.2024.106354","url":null,"abstract":"<div>The concentration of oxygenated monoterpenes (oxyterpenes) in orange peel oil by supercritical fluid adsorption (SFA) was investigated varying pressure (10–24 MPa) and temperature (40–60 ºC) and using silica aerogels as adsorbent. Dynamic solubility experiments were conducted to obtain the solubility of the monoterpenes in supercritical CO2, revealing that it increases with pressure regardless of temperature. For SFA, 10 MPa and 60 ºC was the most appropriate condition to concentrate oxyterpenes, leading to the lowest solubility of oxyterpenes and highlighting the advantage of lower densities for SFA’s selectivity. Furthermore, this condition yielded the highest concentration factors for oxyterpenes (4.3 for linalool and 6.5 for α-terpineol) within the 80–90 min interval. These findings contribute with valuable insights to SFA processes to concentrate oxyterpenes from orange peel oil, which has the potential to enhance the market value and functionality of this important product from citrus industries.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"213 ","pages":"Article 106354"},"PeriodicalIF":3.4,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141769194","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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