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Extraction modeling, kinetics and thermodynamics of solvent extraction of Irvingia gabonensis kernel oil, for possible industrial application
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  • Chinedu Agu,
  • Matthew Menkiti,
  • Pascal Ohale,
  • Victor Ugonabo
Chinedu Agu
Michael Okpara University of Agriculture
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Matthew Menkiti
Nnamdi Azikiwe University Faculty of Engineering Technology
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Pascal Ohale
Nnamdi Azikiwe University Faculty of Engineering Technology
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Victor Ugonabo
Nnamdi Azikiwe University Faculty of Engineering Technology
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Abstract

Temperature, time and particle size effects on Irvingia gabonensis kernel oil (IGKO) yield, as well as the kinetics and thermodynamics parameters were investigated. Highest oil yield of 68.80 % (by weight) was obtained at 55 °C, 150 min., and 0.5 mm. Evaluated physicochemical properties of IGKO indicated that viscosity, acidity, dielectric strength, flash and pour points were 19.37 mm2s-1, 5.18 mg KOHg-1, 25.83 KV, 285 °C, and 17 °C, respectively, suggesting its feasibility as transformer fluid upon further treatment. Of the pseudo second order (PSO) and hyperbolic kinetic models studied, the former gave better fit to the experimental data. ∆H, ∆S and ∆G values of IGKO extraction at 0.5 mm and 328 K were, 251.81 KJ/mol, 1.08 KJ/mol and -105.49 KJ/mol, respectively, indicating the endothermic, irreversible and spontaneous nature of the process. Kinetic model equations that describe the process were successfully developed for both models based on the process parameters.

Peer review status:ACCEPTED

31 Jan 2020Submitted to Engineering Reports
05 Feb 2020Submission Checks Completed
05 Feb 2020Assigned to Editor
22 Mar 2020Editorial Decision: Revise Major
21 May 20201st Revision Received
22 May 2020Assigned to Editor
22 May 2020Submission Checks Completed
26 May 2020Reviewer(s) Assigned
17 Jul 2020Editorial Decision: Revise Major
14 Sep 20202nd Revision Received
15 Sep 2020Assigned to Editor
15 Sep 2020Submission Checks Completed
18 Sep 2020Editorial Decision: Accept