Journal of Supercritical Fluids最新文献_第5页

Multilayer microcellular structures by steam-assisted one-step supercritical CO₂ foaming of PMMA 蒸汽辅助一步超临界CO 2发泡PMMA多层微孔结构

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-08-14 DOI: 10.1016/j.supflu.2025.106746

Aránzazu Redondo , Judith Martín-de León , Michel Simard , Danilo Cantero

{"title":"Multilayer microcellular structures by steam-assisted one-step supercritical CO₂ foaming of PMMA","authors":"Aránzazu Redondo , Judith Martín-de León , Michel Simard , Danilo Cantero","doi":"10.1016/j.supflu.2025.106746","DOIUrl":"10.1016/j.supflu.2025.106746","url":null,"abstract":"<div><div>In this work, we introduce a one-step steam-assisted supercritical CO₂ foaming process to create multilayer PMMA foams with tunable pore structures. The method operates entirely above the polymer’s effective glass transition temperature (125 °C), allowing saturation and foaming to take place simultaneously in a matter of minutes. By adding subcritical water before saturation, the system triggers a steam explosion during depressurization, leading to much faster pressure drops (up to 40 % faster), improved nucleation, and a notable reduction in structural defects. As a result, foams with more uniform cells, finer pore sizes (2.3 µm), and lower densities (91 kg / m<sup>3</sup>; +10 X expansion) are obtained even at moderate pressures. A particularly interesting outcome is the formation of multilayer architectures: polymer pellets with different levels of CO₂ uptake fuse naturally into foams with distinct porosities across layers. This opens new opportunities for designing multifunctional materials, where different layers could be tailored for specific mechanical, thermal, or acoustic roles. The creation of multilayer is mostly attributed by the combination of one-step foaming above the Tg of the polymer together with a pellet sudden ejection from the autoclave while foaming and freezing the structure. Overall, the steam-assisted approach offers a scalable and energy-efficient pathway to produce polymer foams with customized microstructures and properties.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"227 ","pages":"Article 106746"},"PeriodicalIF":4.4,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865053","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

Eco-friendly extraction of Pistacia lentiscus bioactives: Supercritical CO2 technology and artificial neural networks predictions 黄连木生物活性物质的环保提取：超临界CO2技术和人工神经网络预测

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-08-12 DOI: 10.1016/j.supflu.2025.106751

Hamza Bouakline , Imane Ziani , Mohammed Elkabous , Nour Elhouda Daoudi , Alberto Angioni , Alessandro Atzei , Francesco Corrias , Yasser Karzazi , Abdesselam Tahani , Ali El Bachiri

{"title":"Eco-friendly extraction of Pistacia lentiscus bioactives: Supercritical CO2 technology and artificial neural networks predictions","authors":"Hamza Bouakline , Imane Ziani , Mohammed Elkabous , Nour Elhouda Daoudi , Alberto Angioni , Alessandro Atzei , Francesco Corrias , Yasser Karzazi , Abdesselam Tahani , Ali El Bachiri","doi":"10.1016/j.supflu.2025.106751","DOIUrl":"10.1016/j.supflu.2025.106751","url":null,"abstract":"<div><div>In the present study, supercritical CO<sub>2</sub> extraction was used as green extraction techniques to recover extracts from <em>P. lentiscus</em> both fresh and dried leaves. The fresh and dried leaf at different temperature ranging between 30 °C and 70 °C, was analyzed in a various of experiments at extraction temperatures between 35 °C and 55 °C and extraction pressures between 100 bar and 200 bar. The process efficiency was determined basing on the extraction yield, total phenol content, antioxidant and antidiabetic activity using artificial neural network. As a result, the fresh leaves extracted at 100 bar and 35 °C presented the most interest extraction yield (48.11 ± 0.56 %), followed by the dried leaves extract at 200 bar and 55 °C (39.39 ± 1.13 %). Regarding the total phenol content, the important amount was observed at 100 bar, 35 °C and 200 bar, 55 °C for the fresh and dried leaves at 30 °C respectively. Concerning antioxidant activity via DPPH test, the highest observed in fresh leaves was with an IC<sub>50</sub> of 37.13 ± 2.7 mg/mL, whereas for dried leaves, the best IC<sub>50</sub> was 37.18 ± 0.99 mg/mL for leaves dried at 30 °C. Similarly, for antidiabetic activity using α-amylase, the significant IC<sub>50</sub> are observed at low pressure and low temperature in fresh samples. The ANN model has a higher predictive potential with higher correlation coefficients of 0.9810, compared to other models.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"227 ","pages":"Article 106751"},"PeriodicalIF":4.4,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144841890","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

Pressurized liquid extraction for the recovery of alkaloids from cocoa pod husk 从可可豆荚壳中提取生物碱的加压液体萃取法

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-08-06 DOI: 10.1016/j.supflu.2025.106733

Isabela Ferreira Moreno , Ana Carolina de Aguiar , Maurício Ariel Rostagno , Julian Martínez

{"title":"Pressurized liquid extraction for the recovery of alkaloids from cocoa pod husk","authors":"Isabela Ferreira Moreno , Ana Carolina de Aguiar , Maurício Ariel Rostagno , Julian Martínez","doi":"10.1016/j.supflu.2025.106733","DOIUrl":"10.1016/j.supflu.2025.106733","url":null,"abstract":"<div><div>Cocoa pod husk (CPH), which makes up to 76 % of the cocoa fruit mass, is the main waste product of the cocoa chain and holds untapped potential due to its alkaloid content and antioxidant activity. Therefore, this work aimed to explore the sustainable use of CPH by recovering alkaloids by pressurized liquid extraction (PLE), evaluating the effects of temperature, solvent composition, solvent/feed ratio, and their interactions. PLE was performed following an experimental face-centered design that evaluated temperature (80, 100, and 120 °C), solvent mixtures of ethanol in water (50, 75, 100 % ethanol (w:w)) and solvent/feed ratio (3, 6, 9 kg solvent/kg CPH) at a pressure of 10.0 ± 0.5 MPa. Maceration and ultrasound-assisted extraction were performed with the same solvent mixture and solvent/feed ratio of the best PLE condition (120 °C, 50 % EtOH, and 9 kg solvent/kg CPH). The extracts were compared in terms of global yield (X<sub>0</sub>) (3.36–18.00 %, w/w), total reducing capacity (TRC) (0.99–11.62 mg gallic acid equivalent (GAE)/g CPH), alkaloids content (theobromine: 1.1–6.7 mg/g CPH; caffeine: 0.50–1.57 mg/g CPH), ferric reducing antioxidant power (FRAP) (0.01–24.04 mg trolox equivalent (TE)/g CPH), and oxygen radical absorbance capacity (ORAC) (2.68–37.09 mg TE/g CPH), in which PLE stood out compared to conventional extractions. The results demonstrated that temperature, solvent composition and solvent/feed ratio significantly influenced PLE of CPH, highlighting the effectiveness of hydroalcoholic mixtures and high temperatures. To sum up, PLE is a promising strategy for the sustainable valorization and functional food applications of CPH.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"227 ","pages":"Article 106733"},"PeriodicalIF":4.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809798","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

Investigation of phase transitions in the CO2 + bicyclohexyl system: Experimental and modeling study CO2 +双环己基体系相变的研究：实验和模型研究

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-08-05 DOI: 10.1016/j.supflu.2025.106725

Trujillo Vera Willam Paul , Hugo Andersson Dantas Medeiros , Federico Ezequiel Benelli , Martín Cismondi-Duarte , Filipe Xavier Feitosa , Hosiberto Batista de Sant’Ana

{"title":"Investigation of phase transitions in the CO2 + bicyclohexyl system: Experimental and modeling study","authors":"Trujillo Vera Willam Paul , Hugo Andersson Dantas Medeiros , Federico Ezequiel Benelli , Martín Cismondi-Duarte , Filipe Xavier Feitosa , Hosiberto Batista de Sant’Ana","doi":"10.1016/j.supflu.2025.106725","DOIUrl":"10.1016/j.supflu.2025.106725","url":null,"abstract":"<div><div>This study explores the high-pressure phase behavior of the carbon dioxide (CO<sub>2</sub>) + bicyclohexyl binary system over a temperature range of (303.15–373.15) K. Saturation pressures were measured using a constant composition expansion (CCE) method, covering pressures from (2.53–82.54) MPa. A total of 67 phase transitions were identified, including liquid (L) to liquid-vapor (LV), liquid-liquid (LL) to liquid-liquid-vapor (LLV), and vapor (V) to LV transitions, for CO<sub>2</sub> gas content ranging from (19.90–99.02) mol%. Notably, LL immiscibility was observed for mixtures with a global mole composition of (69.99, 80.05, 85.43, 90.03) mol% CO<sub>2</sub> at temperatures up to 323.15 K. These findings provide valuable insights about the CO<sub>2</sub> solubility in naphtenic hydrocarbons, which differs significantly from typical alkanes. The experimental data were modeled using the Peng–Robinson equation of state (PR EOS) with Modified Huron–Vidal non-random two-liquid (MHV-NRTL) mixing rules, agreeing with most conditions. This work contributes to the understanding of asymmetric mixture behavior and supports the development of improved thermodynamic models for industrial use.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"226 ","pages":"Article 106725"},"PeriodicalIF":4.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780076","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

Life cycle assessment of refined sunflower oil production for food industry: Exploring hexane-free alternative using supercritical CO2 for processing pressed cake 食品工业用精制葵花籽油生产的生命周期评价：探索利用超临界CO2加工压榨饼的无己烷替代品

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-08-05 DOI: 10.1016/j.supflu.2025.106735

Christopher Hernandez, Ana Paula Kaucz, Jean-Stéphane Condoret, Jean-Christophe Remigy, Catherine Azzaro-Pantel, Séverine Camy

{"title":"Life cycle assessment of refined sunflower oil production for food industry: Exploring hexane-free alternative using supercritical CO2 for processing pressed cake","authors":"Christopher Hernandez, Ana Paula Kaucz, Jean-Stéphane Condoret, Jean-Christophe Remigy, Catherine Azzaro-Pantel, Séverine Camy","doi":"10.1016/j.supflu.2025.106735","DOIUrl":"https://doi.org/10.1016/j.supflu.2025.106735","url":null,"abstract":"Sunflower oil, valued for its high polyunsaturated fatty acid content and antioxidant properties, is primarily extracted using a two-stage process involving mechanical pre-pressing and hexane extraction. Despite its efficiency, hexane extraction raises significant environmental and health concerns. Supercritical carbon dioxide offers a green alternative with advantages in safety and regulatory compliance. This study conducts a comparative Life Cycle Assessment (LCA) of conventional hexane extraction versus Supercritical Fluid Extraction using carbon dioxide (SFE-CO<ce:inf loc=\"post\">2</ce:inf>), where in the case of SFE-CO<ce:inf loc=\"post\">2</ce:inf> two methods for regeneration of CO<ce:inf loc=\"post\">2</ce:inf> after the extraction step are considered: conventional decompression and a novel membrane separation technique. The LCA, performed using the ReCiPe 2016 methodology and SimaPro software, evaluates environmental impacts across 18 midpoint and 3 endpoint categories. The results show that SFE-CO<ce:inf loc=\"post\">2</ce:inf> with decompression recovery has higher environmental impacts than hexane extraction (due to higher energy consumption) but the use of membrane filtration for CO<ce:inf loc=\"post\">2</ce:inf> regeneration significantly reduces these impacts. Compared to hexane extraction, SFE-CO<ce:inf loc=\"post\">2</ce:inf> with regeneration by membrane achieves a 95 % reduction in environmental impact and a 99.3 % reduction compared to conventional CO<ce:inf loc=\"post\">2</ce:inf> extraction. These results highlight the potential of SFE-CO<ce:inf loc=\"post\">2</ce:inf> using membrane filtration as a sustainable alternative for industrial sunflower oil production, addressing both environmental and health concerns associated with the use of hexane.","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"13 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144900010","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

Cellulose acetate foams fabricated by solvent-assisted foaming via plasticization and enhanced CO2 diffusion 通过增塑化和增强CO2扩散的溶剂辅助发泡法制备醋酸纤维素泡沫

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-08-05 DOI: 10.1016/j.supflu.2025.106734

Dongxu Tian, Junji Hou, Yimu Qiao, Chang Han, Jingbo Chen

引用次数: 0

Synthesis of biodegradable chitosan film loaded with Pseuderanthemum palatiferum leaf extract obtained by supercritical CO2 extraction: Characterization, antibacterial properties, and fruit preservation 超临界CO2萃取白假菊叶提取物生物可降解壳聚糖膜的合成：表征、抗菌性能及果实保鲜

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-08-05 DOI: 10.1016/j.supflu.2025.106736

Do Pham Minh Huong , Dang Huynh Minh Tam , Tran Do Dat , Trinh Lai Loi , Tran Nguyen Cam Nhung , Hoang Minh Nam , Nguyen Huu Hieu

{"title":"Synthesis of biodegradable chitosan film loaded with Pseuderanthemum palatiferum leaf extract obtained by supercritical CO2 extraction: Characterization, antibacterial properties, and fruit preservation","authors":"Do Pham Minh Huong , Dang Huynh Minh Tam , Tran Do Dat , Trinh Lai Loi , Tran Nguyen Cam Nhung , Hoang Minh Nam , Nguyen Huu Hieu","doi":"10.1016/j.supflu.2025.106736","DOIUrl":"10.1016/j.supflu.2025.106736","url":null,"abstract":"<div><div>In this study, the supercritical CO₂ technique was used to obtain polyphenol-rich extracts from the <em>Pseuderanthemum palatiferum</em> (<em>P. palatiferum</em>) leaf. The extraction was conducted at 349 bar and 60 °C for 2 h, using ethanol as a co-solvent. The combination of <em>P. palatiferum</em> leaf extract (PPLE) with chitosan (CS) was investigated to fabricate CS-PPLE films by using the solution-casting method. The effects of different concentration of PPLE (1, 2, and 3 % v/v compared to the weight of CS) on the mechanical, biodegradable, antimicrobial, and food preservation properties of films were evaluated. Characterization of the films was performed via scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) techniques, and Fourier transform infrared spectroscopy (FTIR), revealing the intermolecular interactions between chitosan and the bioactive compounds in the extract. The soil burial tests showed that CS−PPLE films have good biodegradability in soil after 21 days. The antibacterial activity of the material also showed the highest inhibition performance towards <em>Escherichia coli</em>. The <em>P. palatiferum</em> loaded films showed good preservation performance for both persimmon (<em>Diospyros kaki</em>) and sugar apple (<em>Annona squamosa</em>), extending their shelf life to 9 and 5 days at room temperature, respectively, compared to the control films, which preserved them for only 7 and 3 days. All results demonstrated their potential for sustainable material and extending shelf life of fruit, which could be used in food packaging.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"227 ","pages":"Article 106736"},"PeriodicalIF":4.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144779472","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

Subcritical hydrolysis of defatted meal of crambe seed: A strategy for the full use of the matrix 苎麻籽脱脂粕的亚临界水解：充分利用基质的策略

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-07-29 DOI: 10.1016/j.supflu.2025.106729

Djéssica Tatiane Raspe, Lúcio Cardozo-Filho, Camila da Silva

{"title":"Subcritical hydrolysis of defatted meal of crambe seed: A strategy for the full use of the matrix","authors":"Djéssica Tatiane Raspe, Lúcio Cardozo-Filho, Camila da Silva","doi":"10.1016/j.supflu.2025.106729","DOIUrl":"10.1016/j.supflu.2025.106729","url":null,"abstract":"<div><div>This work investigated the subcritical water hydrolysis (SWH) of defatted crambe seed meal to obtain total reducing sugars (RS), fermentable sugars (FS) and platform chemical products (PC). For this purpose, the experiments evaluated the effect of temperature (180, 200 and 220 °C) and pressure (5, 10 and 15 MPa) of the process conducted in semi-continuous mode. The results obtained indicate that the temperature of 180 ºC allowed the obtaining of RS and FS, while the higher PC contents are the result of the increase in this variable. Pressure influenced, in isolation, only the obtaining of FS, requiring synergy with temperature to obtain the other products. The dry hydrolysates presented xylose and glucose as predominant FS, and levulinic acid as PC. The FT-IR data demonstrated that the SWH process is efficient for the conversion of biomass into FS and PC, allowing the production of compounds with higher added value. The characterization of the residual biomass (RB) indicated the solubilization of phytochemicals into the hydrolysate, and the loss of its color suggests degradation due to the occurrence of the Maillard reaction of the residual constituents. Additionally, organic acids were identified by FT-IR and the characterization of RB demonstrated relative bioherbicidal potential, in addition to the possibility of thermochemical conversion for energy production, consolidating the concept of biorefinery to the matrix in question.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"226 ","pages":"Article 106729"},"PeriodicalIF":4.4,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144758074","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

Characteristics and mechanisms of dissolution (mixed Na2SO4-K2SO4, Na2SO4-Na/KCl) and deposition (Na2SO4, K2SO4, KCl, mixed Na2SO4-KCl) of salts in supercritical water 盐在超临界水中溶解（混合Na2SO4-K2SO4、Na2SO4- na /KCl）和沉积（Na2SO4、K2SO4、KCl、混合Na2SO4-KCl）的特性及机理

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-07-29 DOI: 10.1016/j.supflu.2025.106732

Peng Feng , Donghai Xu , Kunkun Song , Gang Yin , Guanyu Jiang , Yang Yang , Yaling He

{"title":"Characteristics and mechanisms of dissolution (mixed Na2SO4-K2SO4, Na2SO4-Na/KCl) and deposition (Na2SO4, K2SO4, KCl, mixed Na2SO4-KCl) of salts in supercritical water","authors":"Peng Feng , Donghai Xu , Kunkun Song , Gang Yin , Guanyu Jiang , Yang Yang , Yaling He","doi":"10.1016/j.supflu.2025.106732","DOIUrl":"10.1016/j.supflu.2025.106732","url":null,"abstract":"<div><div>Supercritical water oxidation efficiently degrades organic waste but faces challenges from salt deposition due to the low solubilities of salts in supercritical water (SCW). This study investigated the characteristics and mechanisms of dissolution and deposition of mixed sulfate and chloride salts in SCW. At low water densities the common ion effect was observed in Na<sub>2</sub>SO<sub>4</sub>/K<sub>2</sub>SO<sub>4</sub> mixtures. Na<sup>+</sup> tended to occupy the junctions between SO<sub>4</sub><sup>2-</sup>, while K<sup>+</sup> tended to occupy the cluster endings. Due to the weaker electrostatic interaction between K<sup>+</sup> (with larger ionic radius) and SO<sub>4</sub><sup>2-</sup>, large and medium-sized clusters were more prone to decomposition in K<sup>+</sup>-rich solutions. K<sub>2</sub>SO<sub>4</sub> induced a “salting-in” effect on Na<sub>2</sub>SO<sub>4</sub>, whereas Na<sub>2</sub>SO<sub>4</sub> exerted a “salting-out” effect on K<sub>2</sub>SO<sub>4</sub> at high water densities. Both sulfates exhibited heterogeneous nucleation, depositing on heated sidewalls as nucleation sites, with Na<sub>2</sub>SO<sub>4</sub> proving more difficult to remove than K<sub>2</sub>SO<sub>4</sub>. In KCl/Na<sub>2</sub>SO<sub>4</sub> mixtures, homogeneously nucleated chloride salts created many preferential nucleation sites for Na<sub>2</sub>SO<sub>4</sub> deposition.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"226 ","pages":"Article 106732"},"PeriodicalIF":4.4,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766703","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

Determination of rate of diffusion of water into liquid carbon dioxide during CO2 storage 二氧化碳储存期间水向液态二氧化碳扩散速率的测定

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-07-28 DOI: 10.1016/j.supflu.2025.106730

Hakduck Kim , Seungtaek Lee , Heechang Lim , Juhun Song

{"title":"Determination of rate of diffusion of water into liquid carbon dioxide during CO2 storage","authors":"Hakduck Kim , Seungtaek Lee , Heechang Lim , Juhun Song","doi":"10.1016/j.supflu.2025.106730","DOIUrl":"10.1016/j.supflu.2025.106730","url":null,"abstract":"<div><div>The disposal of liquid CO2 (LCO2) into the ocean has been recognized as a potential method for mitigating global warming. This approach requires a deep understanding of water solubility and the kinetics of water dissolution into LCO2. Therefore, it is essential to determine both the diffusion rate and the underlying diffusion mechanism of water into LCO2. In this study, the volume change of water dissolved in LCO<sub>2</sub> was visualized using the shadowgraph technique, from which the diffusion rate constant was derived. The diffusion coefficient of water in the LCO<sub>2</sub> system was determined using a steady state dissolution model of a water drop. The diffusion rate of water containing ionic solutes, such as potassium hydroxide (KOH), was further measured at different concentrations. The results showed that the square of the equivalent diameter decreased linearly with time for water without KOH. A linear relationship existed between the diffusion rate constant and water solubility in CO<sub>2</sub>. These findings indicate that the diffusion of water is the most important mechanism for the dissolution of water into LCO<sub>2</sub>. Increasing the ionic solute concentration decelerates water dissolution due to the discernible precipitation of salts such as bicarbonates or carbonates.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"226 ","pages":"Article 106730"},"PeriodicalIF":4.4,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723348","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