RETRACTED ARTICLE: Supercritical Fluid Extraction of Oils from Pomegranate Seeds

Ahangari, Behdad; Sargolzaei, Javad

doi:10.1007/s11746-011-1789-9

Cited by 2 publications

(1 citation statement)

References 25 publications

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“…Recently, extraction with supercritical fluid due to its low viscosity [9], high permeability, short extraction time [10], a method with very low toxicity and non-flammability [11], no contamination of the product with solvent [12], environment friendly, performing extraction operations at low temperatures (to preserve the properties temperature-sensitive materials) [13] and the easy recovery of the final product have received much attention, which results in high efficiency and profitability. Ahangari et al [14], reported for the first time that graphite can be layered and separated in graphene sheets in the scCO2. Still, considering that only surfactant was added during the experiment and without any help, no solvent was used, and at the end of the experiment, ultrasonic and centrifuge operations were not used, the added surfactant was hardly removed from the final product.…”

Section: Introductionmentioning

confidence: 99%

Investigating The Effect of Various Parameters on The Yield of Graphene Obtained Through Graphite Exfoliation Using CO2 Supercritical Fluid

Saeedi,

Sargolzaei

2023

ETJ

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Conventional methodsof graphene production are time-consuming and expensive.• The parameters affecting the extraction of graphene from graphite were investigated using Supercritical CO2. • Additives used in the synthesis process have the role of deactivating the surface. • The test design was done with "Design Expert" software and then tested in the laboratory.• The software results were in high agreement with the laboratory results, and mono/bilayer graphene was obtained.Due to its high penetration force and low viscosity, the Supercritical carbon dioxide (scCO2) can spread between the graphite layers, overcome van der Waals forces, and transform graphite into multilayer graphene. The results of the test plan with the Design Expert software and also the use of these results in the laboratory showed that the parameters of temperature, pressure, initial amount of graphite, addition of surfactant and solvent auxiliary, the duration of sample placement in the device, the duration of carbon dioxide gas release from the device, and the time and power of ultrasonic and centrifuge operations can accelerate the exfoliation process. The resulting graphene was characterized by TEM, RAMAN, XRD, and AFM techniques. Based on the obtained results, it was found that mono/bilayer graphene was obtained by applying optimum conditions. The results confirmed the formation of mono/bilayer graphene based on the G-Band of 1583 cm -1 in the Raman test, a wavelength of 26.44° in the XRD test, and a thickness of 1.5 nm in the AFM test. With a simple, low-cost approach, this method, without using toxic and expensive chemicals with high profitability, can replace other complex graphene production methods, such as chemical vapor leakage and plasma etching, and be chemically reduced..

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Section: Introductionmentioning

confidence: 99%

Investigating The Effect of Various Parameters on The Yield of Graphene Obtained Through Graphite Exfoliation Using CO2 Supercritical Fluid

Saeedi,

Sargolzaei

2023

ETJ

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Capítulo 9: Caracterización de Biocompuestos en el Aceite de Semillas de Granada Wonderful extraídos mediante Dióxido de Carbono Supercrítico

Cornejo Figueroa,

Cartagena Cutipa,

Alcázar Alay

et al. 2023

Gestión Del Conocimiento. Perspectiva Multidisciplinaria (Libro 60)

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El objetivo principal de este estudio fue extraer y caracterizar los biocompuestos presentes en el aceite de las semillas de Punica granatum, variedad Wonderful, utilizando dióxido de carbono supercrítico (sc-CO2) a una presión constante de 320 bar y un caudal de ~4,05 kg/h. Se exploraron diferentes combinaciones de temperaturas (40, 50 y 60 °C) y tiempos de extracción (200, 250 y 300 minutos), seguidos por análisis mediante cromatografía de gases con detección de ionización de llama y espectrometría de masas. Los resultados indicaron que a 60 °C se logró el mayor rendimiento de aceite (19,54%) durante un período de extracción de 300 minutos, mostrando significancia estadística (p <0,05). Se identificó ácido púnico como el componente predominante, seguido por ácidos esteárico y palmítico, junto con otros ácidos grasos en cantidades menores. Además, se hallaron tocoferoles y esteroles, destacándose la presencia de gamma y beta tocoferol, gamma y beta sitosterol, estigmasterol y alfa tocoferol (vitamina E) como componentes esenciales. El alto contenido de ácido púnico y otros compuestos beneficiosos subraya su potencial aplicabilidad en investigaciones relacionadas con componentes saludables y funcionales, aportando relevancia en el ámbito de la salud y la nutrición.

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RETRACTED ARTICLE: Supercritical Fluid Extraction of Oils from Pomegranate Seeds

Cited by 2 publications

References 25 publications

Investigating The Effect of Various Parameters on The Yield of Graphene Obtained Through Graphite Exfoliation Using CO2 Supercritical Fluid

Investigating The Effect of Various Parameters on The Yield of Graphene Obtained Through Graphite Exfoliation Using CO2 Supercritical Fluid

Capítulo 9: Caracterización de Biocompuestos en el Aceite de Semillas de Granada Wonderful extraídos mediante Dióxido de Carbono Supercrítico

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