Modeling of Supercritical Fluid Extraction from Hippophae rhamnoides L. Seeds

Jianzhong Yin, Xianwen Sun, Xinwei Ding, Hanhua Liang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

Modeling of supercritical CO2extraction of Hippophae rhamnoides L. seed oil was studied at 15 to 30 MPa and 30 to 45°C. Four mean Hippophae rhamnoides L. particle sizes raging from 0.4 to 1.0 mm were tested. CO2flow rate ranged between 0.05 and 0.2 m3h-1. A new method that can be used for the simulation of SCFE process was presented. The model was based on differential mass balances along the extraction bed. The equilibrium between the solid and the fluid phase appeared to be the controlling step during the extraction fast period. By a series of transforms and derivatives, the explicit expression of the oil yield, q(z,t), was obtained. It can be used for the SCFE process simulation. In this model, only one adjustable parameter was used: the equilibrium constant between the solvent and the free solute phase, K. A fairly good fitting of the experimental data was obtained by setting K = 10. The Hippophae rhamnoides L. seed oil extraction process was modeled as a desorption process from the seed matter plus a small mass-transfer resistance.
Original languageEnglish
Pages (from-to)4041-4055
Number of pages15
JournalSeparation Science and Technology
Volume38
Issue number16
DOIs
Publication statusPublished - 31 Oct 2003

Keywords

  • Hippophae rhamnoides L. seed
  • Simulation
  • Supercritical fluid extraction

ASJC Scopus subject areas

  • Chemistry(all)
  • Process Chemistry and Technology
  • Chemical Engineering(all)
  • Filtration and Separation

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