Journal of Supercritical Fluids最新文献_第2页

Photocatalytic performance assessment of Fe-N co-doped TiO2/β-cyclodextrin hybrid systems prepared by supercritical antisolvent micronization for organic dyes removal 超临界抗溶剂微粉制备Fe-N共掺杂TiO2/β-环糊精杂化体系光催化脱除有机染料性能评价

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106005

Stefania Mottola , Antonietta Mancuso , Olga Sacco , Iolanda De Marco , Vincenzo Vaiano

{"title":"Photocatalytic performance assessment of Fe-N co-doped TiO2/β-cyclodextrin hybrid systems prepared by supercritical antisolvent micronization for organic dyes removal","authors":"Stefania Mottola , Antonietta Mancuso , Olga Sacco , Iolanda De Marco , Vincenzo Vaiano","doi":"10.1016/j.supflu.2023.106005","DOIUrl":"https://doi.org/10.1016/j.supflu.2023.106005","url":null,"abstract":"<div>This work aims to demonstrate that micronized β-cyclodextrin (β-CD) improves the photocatalytic activity of Fe-N-TiO2. Fe-N-TiO2/β-CD hybrid systems were employed in the photocatalytic removal of Acid Orange7 (AO7) and Methylene Blue (MB). The supercritical antisolvent process (SAS) was used to micronize β-CD at different pressures. The chemical-physical properties of the hybrid photocatalysts were detected through various characterization methods. Wide angle X-ray diffraction patterns evidenced the anatase as the typical TiO2 crystalline phase. FT-IR spectra showed interactions between β-CD and Fe-N-TiO2. The activity of photocatalysts in the degradation of AO7 and MB dyes was analyzed under UV and visible light irradiation. Fe-N-TiO2/β-CD120 photocatalyst led to the total UV light-driven discoloration of the AO7 aqueous solution. Instead, the Fe-N-TiO2/β-CD120 system allowed for achieving an MB discoloration kinetic constant under visible light higher than the AO7 discoloration kinetic constant. Reuse cycle tests proved that the Fe-N-TiO2/β-CD120 sample is a stable photocatalytic material.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"201 ","pages":"Article 106005"},"PeriodicalIF":3.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49905505","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: 1

Controllable cell structures of poly(ether-block-amide) foams via isothermal melt crystallization-foaming in supercritical CO2 超临界CO2等温熔融结晶发泡聚醚块酰胺泡沫的可控制胞体结构

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106030

Chenguang Wang, Menglong Xu, Yichong Chen, Zhimei Xu, Ling Zhao, Dongdong Hu

{"title":"Controllable cell structures of poly(ether-block-amide) foams via isothermal melt crystallization-foaming in supercritical CO2","authors":"Chenguang Wang, Menglong Xu, Yichong Chen, Zhimei Xu, Ling Zhao, Dongdong Hu","doi":"10.1016/j.supflu.2023.106030","DOIUrl":"https://doi.org/10.1016/j.supflu.2023.106030","url":null,"abstract":"<div>A simple isothermal melt crystallization-foaming method was proposed to regulate the crystallinity (Xc) of PEBA to prepare poly(ether-block-amide) (PEBA) foams with uniform or bimodal cell structures by supercritical CO2. PEBA with different Xc values was obtained by controlling the isothermal crystallization temperature (Tiso) and time (tiso). The rheological and DSC results showed that the viscoelasticity and Xc of the samples increased with decreasing Tiso and increasing tiso. PEBA foams with Xc above 1.1% exhibited a distinct bimodal cell structure. The increased crystals acted as heterogeneous nucleation sites to increase the cell density from 6.8 × 106 cells/cm3 to 3.58 × 1010 cells/cm3. The size of large cells decreased from 206.4 µm to 48.0 µm, and the number ratio of small to large cells increased from 2.34 to 65 times. Finally, a mechanism to explain the cell structure variation in PEBA foams was proposed, providing a new strategy for regulating the cell structure of polymeric foams.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"201 ","pages":"Article 106030"},"PeriodicalIF":3.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49885282","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

Insights into oxidation and nitridation of alumina-forming FeCrAl alloy after supercritical water exposure: Effect of pre-corrosion on high-temperature damage behavior 超临界水暴露后铝形成的FeCrAl合金的氧化和氮化:预腐蚀对高温损伤行为的影响

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106007

Guanyu Jiang, Donghai Xu, Huanteng Liu, Bing He, Lu Liu, Yanhui Li, Jianqiao Yang

{"title":"Insights into oxidation and nitridation of alumina-forming FeCrAl alloy after supercritical water exposure: Effect of pre-corrosion on high-temperature damage behavior","authors":"Guanyu Jiang, Donghai Xu, Huanteng Liu, Bing He, Lu Liu, Yanhui Li, Jianqiao Yang","doi":"10.1016/j.supflu.2023.106007","DOIUrl":"https://doi.org/10.1016/j.supflu.2023.106007","url":null,"abstract":"<div>This work investigated the corrosion characteristics of FeCrAl alloy in supercritical water (SCW), and focused on the effect of SCW pre-corrosion on the alloy oxidation and nitridation at 900 °C. FeCrAl alloy formed outer Fe-rich oxides (mainly Fe2O3) and inner Fe-Cr-Al oxides during SCW exposure. SCW pre-corrosion made FeCrAl alloy exhibit different morphologies and phase compositions in the same medium. SCW pre-corrosion promoted the deposition of Ni and Mo elements from the autoclave, filling the gaps in flaky oxides by forming Ni- and/or Mo-rich products in air and N2. Moreover, SCW pre-corrosion avoided the appearance of accelerated nitridation zones in N2. However, pre-corrosion caused the preferential diffusion of N2 and air. Outward-diffused Cr ions during SCW exposure reacted with O impurities in N2 to form Cr2O3 that easily dissociated N2, leading to the development of nitridation towards the alloy interior.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"201 ","pages":"Article 106007"},"PeriodicalIF":3.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49905483","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: 1

Enhancement of biogenic methane production from coal using supercritical CO2 利用超临界CO2提高煤生物甲烷产率

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106023

Xiao Feng , Zizhong Zhang , Hongguang Guo , Zhigang Li , Zaixing Huang , Michael Urynowicz

{"title":"Enhancement of biogenic methane production from coal using supercritical CO2","authors":"Xiao Feng , Zizhong Zhang , Hongguang Guo , Zhigang Li , Zaixing Huang , Michael Urynowicz","doi":"10.1016/j.supflu.2023.106023","DOIUrl":"https://doi.org/10.1016/j.supflu.2023.106023","url":null,"abstract":"<div>Supercritical CO2 (ScCO2) extraction could improve the bioavailability of coal for the enhancement of biogenic methane production. Here, the influence of prolonged ScCO2 extraction on methane yield was investigated since in-situ ScCO2 injection is time-consuming. The results showed that the enhancement of biomethane production from coal was negatively correlated with extraction time and extraction yield. With the extension of ScCO2 extraction time from 0.5 day to 28 days, the methane yield of extracted coals increased by 20.1∼111.4% than that of raw coal. ScCO2 mainly reacted with the organic structures on the surface of coal (such as the C-O and CH2-C<img>O), rarely the skeleton structure. In the prolonged extraction, aromatics were first extracted, then oxygen-containing matters and aliphatics which reduces the methane production of extracted coal but increases the methane generation potential of extractable organic matter. Then, a conceptual model of ScCO2-MECBM was proposed for enhancing methane recovery in-situ.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"201 ","pages":"Article 106023"},"PeriodicalIF":3.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49885281","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

Globe artichoke leaf extracts and production of phytotherapeutic solid lipid particles using high pressure technologies 洋蓟叶提取物及高压技术生产植物治疗性固体脂质颗粒

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106028

Gabriela Marques Bittencourt, Marina dos Reis Simprônio, Isabella Rodrigues Mothé, Giovana Rosa Ferreira, Alessandra Lopes de Oliveira

{"title":"Globe artichoke leaf extracts and production of phytotherapeutic solid lipid particles using high pressure technologies","authors":"Gabriela Marques Bittencourt, Marina dos Reis Simprônio, Isabella Rodrigues Mothé, Giovana Rosa Ferreira, Alessandra Lopes de Oliveira","doi":"10.1016/j.supflu.2023.106028","DOIUrl":"https://doi.org/10.1016/j.supflu.2023.106028","url":null,"abstract":"<div>The ethanolic extract of artichoke leaves is phytotherapic. Impregnation is used to protect the bioactive material and is also a means of controlling the release of the encapsulated substance while masking unwanted taste and/or color. This research describes a study of artichoke leaf extraction by five techniques and tested the formations of solid-lipid microparticles of beeswax and avocado oil loaded with these extracts by PGSS and their particle stability. Pressurized liquid extraction (PLE) using an intermittent process was optimized and presented the highest content of active compounds in the extracts, although the inulin contents (IC) were higher in the extracts obtained by conventional methods. Two different ratios between solid and liquid lipids and the extract (1:2:3 and 1:2:6; w:w:w) were studied. The particles with a major beeswax ratio showed a smaller distribution and average size (74.2 ± 6.2 µm), but no differences were observed in relation to stability. All extraction techniques were able to yield inulin (max. 173.46 ± 1.27 mginulin/gextract), and with PLE only the temperature had a significant effect on the extraction yield under the studied conditions.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"201 ","pages":"Article 106028"},"PeriodicalIF":3.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49885276","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

Solubility of famotidine in supercritical carbon dioxide: Experimental measurement and thermodynamic modeling 法莫替丁在超临界二氧化碳中的溶解度:实验测量和热力学模型

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106031

Nedasadat Saadati Ardestani , Seyed Ali Sajadian , Adrián Rojas , Ratna Surya Alwi , L. Antonio Estévez

{"title":"Solubility of famotidine in supercritical carbon dioxide: Experimental measurement and thermodynamic modeling","authors":"Nedasadat Saadati Ardestani , Seyed Ali Sajadian , Adrián Rojas , Ratna Surya Alwi , L. Antonio Estévez","doi":"10.1016/j.supflu.2023.106031","DOIUrl":"https://doi.org/10.1016/j.supflu.2023.106031","url":null,"abstract":"<div>In the current study, the solubility of famotidine (FAM) in supercritical carbon dioxide (scCO₂) was experimentally determined for the first time. The FAM solubility in scCO₂, expressed as mole fraction, at different temperatures (308 − 338 K) and pressures (12 − 30 MPa) was found to be in the range of 1.40 × 10−6 to 1.11 × 10−4. Due to the low solubility of FAM in scCO₂, the gas anti-solvent and supercritical anti-solvent processes can be a good option to generate the nano/micro size particles of this drug. The experimental solubility data were correlated by the density-based models of Bartle et al., Méndez-Santiago and Teja (MST), Jouyban et al. and Hozhabr et al., by the non-cubic equation of state PC-SAFT, and by the two versions of the Estévez et al. model (ECM-PR and ECM-RK). According to the modeling results, the Estévez et al. model showed the highest accuracy with AARD values of 9.92 (ECM-PR) and 10.70 (ECM-RK). The empirical models also yielded satisfactory outcomes to the correlation of the solubility of FAM in scCO₂.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"201 ","pages":"Article 106031"},"PeriodicalIF":3.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49885277","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: 1

Solvent effects of water on the decarboxylation of o-phthalic acid in supercritical water 水对邻苯二甲酸在超临界水中脱羧反应的溶剂效应

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106032

Anna Esperanza Quizon Legaspi, Yoshito Oshima, Makoto Akizuki

引用次数: 0

Fluid phase equilibria of Brazilian presalt crude oil – CO2 systems at high pressure and high temperature 巴西盐下原油- CO2体系在高压高温下的流体相平衡

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106033

Hugo Andersson Dantas Medeiros , Alanderson Arthu Araújo Alves , Jean Luc Daridon , Hosiberto Batista de Sant’Ana , Filipe Xavier Feitosa

引用次数: 0

Development of a detailed kinetic model for high-pressure ethanol oxidation in gas phase and supercritical water 建立了气相和超临界水中高压乙醇氧化动力学模型

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106025

Guoxing Li , Hao Chen , Yipu Zhang , Hongming Xu , Mingbo Niu , Chuang Yang

{"title":"Development of a detailed kinetic model for high-pressure ethanol oxidation in gas phase and supercritical water","authors":"Guoxing Li , Hao Chen , Yipu Zhang , Hongming Xu , Mingbo Niu , Chuang Yang","doi":"10.1016/j.supflu.2023.106025","DOIUrl":"https://doi.org/10.1016/j.supflu.2023.106025","url":null,"abstract":"<div>The present study aims to develop a detailed chemical kinetic model for high-pressure ethanol oxidation in the gas phase and supercritical water (SCW). Kinetic parameters for key elementary reactions involving HO2 and CH3OO radicals were updated, deriving from a careful analysis of ignition delay data or analogy. The model performance is validated comprehensively by comparison to a wide variety of recent experimental data from both gas-phase and SCW conditions. The model predicted ignition delay times and speciation measurements (15–60 bar) in the gas phase fairly well. Additionally, the model showed satisfactory performance in reproducing the species concentration profiles at SCW conditions. A comparative kinetic analysis was further conducted to investigate the characteristic differences and similarities of ethanol oxidation at the two conditions. The results indicated SCW lowered the onset temperature for ethanol ignition and facilitated the ethanol oxidation rate, but did not introduce additional oxidation pathways.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"201 ","pages":"Article 106025"},"PeriodicalIF":3.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49885275","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

Model of skin friction coefficient in a supercritical CO2 turbine-alternator-compressor unit 超临界CO2汽轮-交流-压缩机组摩擦系数模型

IF 3.9 3区工程技术

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI: 10.1016/j.supflu.2023.106027

Lehao Hu , Qinghua Deng , Zhouyang Liu , Jun Li , Zhenping Feng

{"title":"Model of skin friction coefficient in a supercritical CO2 turbine-alternator-compressor unit","authors":"Lehao Hu , Qinghua Deng , Zhouyang Liu , Jun Li , Zhenping Feng","doi":"10.1016/j.supflu.2023.106027","DOIUrl":"https://doi.org/10.1016/j.supflu.2023.106027","url":null,"abstract":"<div>To accurately predict shaft-type and disk-type windage losses in gaps of supercritical CO2 (sCO2) turbine-alternator-compressor (TAC) units, the factors influencing skin friction coefficients Cf,s and Cf,d are investigated, the flow characteristics are analyzed, and the models of Cf,s and Cf,d are proposed. The results reveal the Cf,s and Cf,d decrease with Reynolds number Re increasing, but rise as pressure ratio π and radius ratio η. The leakage flow rate remains constant for Re < 105 and decreases when Re ≥ 105 as Re increases, but grows with π and η. Furthermore, the influences of Re on flow are minor compared to π, and vorticity growth with η increases flow instability, which makes corresponding Cf,s and Cf,d grow. The maximal relative deviations of 5.24% and 4.87% prove the proposed models are reliable. These conclusions accurately predict windage loss in whole gaps of TAC units, which helps design small sCO2 power devices.</div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"201 ","pages":"Article 106027"},"PeriodicalIF":3.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49905481","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