Kinetic and Thermodynamics studies for Castor Oil Extraction Using Subcritical Water Technology

Abdelmoez, Wael; Ashour, Eman A.; Naguib, Shahenaz M; Hilal, A. S.; Mahdy, Dalia A. Al; Mahrous, Engy A.; Abdel-Sattar, Essam

doi:10.5650/jos.ess15298

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…As it can be seen in the Figure 1, The kinetics of lipid extraction with time suggested a linear relation till 1.5 hours and then the lipid extraction becomes saturated, suggesting 1.5 hours of extraction time is sufficient. A similar pattern of oil extraction was observed in Castor [15], Jatropha [16,17], Linn [18], Olive [19], Coconut oil [20] and Sterculiasoetida seeds [21]. Similarly, in other microalgae, a similar effect of temperature can be seen [2,14,22].…”

Section: Thermodynamics Parameterssupporting

confidence: 66%

“…Further, with increase in temperature, the mass transfer rates of solvent and lipid increase significantly and thus attributing to increase in lipid with raise in extraction temperature. As it can be seen in the Figure 1 [15], Jatropha [16,17], Linn [18], Olive [19], Coconut oil [20] and Sterculiasoetida seeds [21]. Similarly, in other microalgae, a similar effect of temperature can be seen [2,14,22].…”

Section: Fig 1 Effect Of Temperature On Microalgae Lipid Extraction With Nhexanementioning

confidence: 56%

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Kinetics and thermodynamics of lipids extraction from microalgae using n-hexane

Parida

Biswal

2020

International Journal of Energy Applications and Technologies

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The growth kinetics and bioenergetics of microalgae is well studied; however, the kinetics and thermodynamics of extraction of lipids from microalgae is poorly understood. The present study focuses on the kinetics and thermodynamics of the lipid extraction process from microalgae Chlamydomonas reinhardtii using n-hexanein a Soxhlet extractor. The extraction process was shown to increase lipids extraction with temperature (from 35 to 55 °C). Further, at a given temperature, the percent lipid extraction is linearly increased till 1.5 hours and then remained almost constant. The statistical analysis including parameters like correlation coefficient (R 2), the root mean square (RMS), standard deviation (SD) and standard error of estimation (SEE) were used to establish the relevance of each model. The series of best kinetic models from high to low prominence is pseudo-second order, hyperbolic, Elovich's, parabolic and power model. The enthalpy and entropy of the present system is 266.31 kJ/mol and 0.924 kJ/mol-K, respectively. The Gibb's free energy decreased from-19.053 to-37.412 kJ/mol as the extraction temperature increased. The kinetic and thermodynamics parameters evaluation suggested that the microalgal lipid extraction using n-hexane is efficient and a spontaneous process.

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Section: Thermodynamics Parameterssupporting

confidence: 66%

Section: Fig 1 Effect Of Temperature On Microalgae Lipid Extraction With Nhexanementioning

confidence: 56%

Kinetics and thermodynamics of lipids extraction from microalgae using n-hexane

Parida

Biswal

2020

International Journal of Energy Applications and Technologies

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“…Based on these values, an activation energy below 40 kJ/mol generally indicated a diffusion-controlled process, and higher values represented a chemical reaction process [ 37 ]. In terms of E a, the diffusion-controlled process was governed by the mass transfer or diffusion of the aqueous phase from the solid reactant to the bulk solution.…”

Section: Resultsmentioning

confidence: 99%

Maillard and Hydrolytic Reactions in Subcritical Water Extraction of Bioactive Compounds from Licorice

Fan

Gao

2022

Molecules

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Nowadays, subcritical water extraction (SWE) techniques are extensively investigated worldwide, while the thermal reactions that inevitably occur under subcritical water conditions are rarely studied. In order to investigate the behaviors of the different reactions during SWE of bioactive compounds from licorice, the Maillard reaction process was accessed via their products and the hydrolytic reaction was analyzed according to the kinetic parameters. In addition, the contents of total phenolics and flavonoids in the extracts obtained at the different temperatures were determined and total antioxidant capacities were evaluated by HPLC-ABTS+. The results showed that flavonoids and phenolics from licorice as well as new compounds generated via the Maillard reaction contributed to the antioxidant activity of the extracts. The fluorescence, color and absorbance of the extracts showed that the degree of the Maillard reaction increased with the rise of the extraction temperature. The kinetics of extraction for glycyrrhizic acid showed that it was firstly extracted by diffusion, and then was hydrolyzed into glycyrrhetinic acid 3-O-mono-β-D-glucuronide and glycyrrhetinic acid following a first-order mechanism. These findings could provide deep insights into the SWE process and a new method for producing glycyrrhetinic acid 3-O-mono-β-D-glucuronide and glycyrrhetinic acid.

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“…Examples of these solvent are benzene, hexane, acetone, petroleum ether, ethyl alcohol, etc. [3][4][5][6][7]. The industrial application of solvent extraction method is increasing day by day because of their direct application to a wide range of raw materials with low oil content [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Ocimum basillicum Oil by Solvents Methods

Abed¹,

Kurji²,

Abdulmajeed³

2018

Asian J. Chem.

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The extraction of Basil oil from Iraqi Ocimum basillicum leaves using n-hexane and petroleum ether as organic solvents were studied and compared. The concentration of oil has been determined in a variety of extraction temperatures and agitation speed. The solvent to solid ratio effect has been studied in order to evaluate the concentration of Ocimum basillicum oil. The optimum experimental conditions for the oil extraction were established as follows: n-hexane as organic solvent, 60 °C extraction temperature, 300 rpm agitation speed and 40:1 mL:g amount of solvent to solid ratio.

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Kinetic and Thermodynamics studies for Castor Oil Extraction Using Subcritical Water Technology

Cited by 6 publications

References 19 publications

Kinetics and thermodynamics of lipids extraction from microalgae using n-hexane

Kinetics and thermodynamics of lipids extraction from microalgae using n-hexane

Maillard and Hydrolytic Reactions in Subcritical Water Extraction of Bioactive Compounds from Licorice

Extraction of Ocimum basillicum Oil by Solvents Methods

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