Journal of Supercritical Fluids
Papers 4939
1 page of 494 pages (4,939 results)
#1Tobias C. Klima (Freiberg University of Mining and Technology)H-Index: 1
#2Andreas Peter (FAU: University of Erlangen-Nuremberg)H-Index: 1
Last.Andreas Braeuer (Freiberg University of Mining and Technology)H-Index: 17
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Abstract How do fuel and air mix, if a liquid fuel is injected into an environment featuring pressure and temperature that exceed the critical pressure and the critical temperature of the fuel? It is subject of current discussion on whether and if so when, the fuel/air-mixture becomes supercritical or not. We here report experimental data comprising three mixture properties that are relevant for the current debate, all spatially and temporally resolved throughout the spray and injection event: T...
#1Yu. D. Ivakin (MSU: Moscow State University)H-Index: 9
#2M. N. Danchevskaya (MSU: Moscow State University)H-Index: 9
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Abstract Fine-crystalline barium titanate was synthesized from a mixture of barium hydroxide monohydrate and titanium dioxide in water vapor medium at 200 °C and 1.55 MPa and subsequently treated in subcritical vapor and supercritical water at 200-400 °C and 1.55-26.3 MPa. Recrystallization of synthesized powder led to an increase in average crystal size and to tetragonal distortion of BaTiO3 structure. Formation of highly tetragonal BaTiO3 was observed after the treatment in supercritical water...
Abstract This work aims to evaluate the effects of temperature and pressure on the extraction yield and chemical composition of the supercritical CO2 (SCCO2) extracts of A. gratissima leaves (EAG) and then to investigate in vivo anti-inflammatory activity of the extracts. The leaves of A. gratissima were extracted with supercritical CO2 at 40, 50 and 60 °C and 15, 17.5 and 20 MPa for 120 min. The anti-inflammatory activity was performed with the EAG obtained at 60 °C and 20 MPa. The anti-inflamm...
#1P. Casademont (UCA: University of Cádiz)H-Index: 2
#2J. Sánchez-Oneto (UCA: University of Cádiz)H-Index: 13
Last.J.R. Portela (UCA: University of Cádiz)H-Index: 18
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Abstract The Supercritical Water Gasification (SCWG) of black liquor (BL) to obtain hydrogen and dispose of organic waste simultaneously has been studied in a continuous reactor employing short residence times. The experiments were conducted at 600–700 °C, with times between 24.5–29.1 s, at 23 MPa and feedstock was diluted to different concentration levels (0.81–2.43 wt.%). Furthermore, different NaOH concentrations (0–1.2 wt.%) were added to maintain a basic medium and avoid the polymerization ...
#1Vikash Chandra Roy (Pukyong National University)
#2Adane Tilahun Getachew (DTU: Technical University of Denmark)
Last.Byung-Soo Chun (Pukyong National University)H-Index: 17
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Abstract In the present study, astaxanthin (ASX)-enriched oil extracted from Tiger shrimp waste, Peneaus monodon, and Japanese Spanish mackerel, Scomberomous niphonius, skin in concurrent extraction by supercritical carbon dioxide and quality properties of the oil was evaluated. The extraction condition was optimized by response surface methodology to obtain the highest ASX content. There was a close agreement between the ASX content predicted by the model (46.08 µg/g oil) and the mean actual ex...
#1Qiang Zou (ZJU: Zhejiang University)
#2Diab Khalafallah (ZJU: Zhejiang University)H-Index: 2
Last.Zhanglian Hong (ZJU: Zhejiang University)H-Index: 29
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ABSTRACT Ni(OH)2 nanosheets (NSs) were grown onto an electrochemically activated carbon cloth (ECC) with a self-supported microstructure by using efficient ethanol assisted supercritical deposition method. Benefited from the structural features of the well-developed porous architecture with effective channels for electrolyte ions diffusion and accessible redox sites, the nano-heterostructure brings a high utilization of electroactive material and thereby good electrochemical performance. The spe...
#1Natália Stevanato (UEM: Universidade Estadual de Maringá)H-Index: 1
#2Isabela Julio Iwassa (UEM: Universidade Estadual de Maringá)H-Index: 1
Last.Camila da Silva (UEM: Universidade Estadual de Maringá)H-Index: 18
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Abstract The extraction of radish seed oil (RSO) with subcritical propane (SP) was investigated. The effects of pressure (6 and 10 MPa) and temperature (303 and 333 K) on the oil yield and chemical composition of the RSO were determined and the results were compared with ultrasound-assisted extraction (UAE) and Soxhlet extractor (SE) using n-hexane. The operating conditions investigated with SP had little influence on the RSO yield; however, the solubility was greatest at 333 K and 10 MPa, which...
Abstract In this study, the efficiency of dimethyl carbonate as a solvent in the pressurized liquid extraction (PLE) of crambe seed oil and also as the acyl acceptor in the transesterification reaction using the mixture obtained, simulating a sequential process, was investigated. In the PLE process, the effect of temperature (140 to 180 °C) on the yield and quality of the oil was evaluated, and the results were compared to data obtained applying Soxhlet extraction. The reaction of the PLE mixtur...
#2Kátia Andressa Santos (UNIOESTE: State University of West Paraná)H-Index: 5
Last.Edson Antonio da SilvaH-Index: 23
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Abstract In this study, extracts of Morus alba leaves were obtained by supercritical CO2 and ultrasound-assisted methods, and the results were compared to those of the conventional Soxhlet extraction. The supercritical extraction resulted in the highest yields of 1.08 and 1.11 wt%, when under the highest pressure conditions investigated (200 bar; 40 and 60 °C, respectively). The ultrasound-assisted n-hexane extraction yielded 0.83 wt% at a temperature of 60 °C, solvent-to-solid ratio of 20 mL g−...
#1Akira Yoko (Tohoku University)H-Index: 5
#2Sho Okabe (Tohoku University)
Last.Tadafumi Adschiri (Tohoku University)H-Index: 49
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Abstract While using the titanium organic complex as a starting material under widely various seed concentrations and temperature conditions, this study examined the reaction kinetics of titanium oxide formation on nickel particles. Homogeneous and heterogeneous nucleation depending on temperature were studied from the perspective of reaction engineering for core–shell type particle design. Homogeneous nucleation and the growth rate were comparable: around 250 °C with 4.8 wt% nickel loading. Het...
Top fields of study
Supercritical fluid
Supercritical carbon dioxide
Organic chemistry