Dynamic semi-batch supercritical fluid extraction model based on fundamentally thermodynamic equilibrium properties

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  • Ota Masaki
    Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Graduate School of Engineering, Tohoku University Department of Frontier Science for Advanced Environment, Graduate School of Environmental Studies, Tohoku University
  • Urabe Masato
    Department of Frontier Science for Advanced Environment, Graduate School of Environmental Studies, Tohoku University
  • Nomura Koichiro
    Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Graduate School of Engineering, Tohoku University
  • Hiraga Yuya
    Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Graduate School of Engineering, Tohoku University
  • Watanabe Masaru
    Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Graduate School of Engineering, Tohoku University Department of Frontier Science for Advanced Environment, Graduate School of Environmental Studies, Tohoku University
  • Inomata Hiroshi
    Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Graduate School of Engineering, Tohoku University

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Other Title
  • 熱力学平衡物性に基づく新しい半回分式超臨界抽出モデルの開発
  • ネツリキガク ヘイコウ ブッセイ ニ モトズク アタラシイ ハンカイブンシキ チョウリンカイ チュウシュツ モデル ノ カイハツ

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Abstract

<p>A new dynamic extraction model was developed based on fundamentally thermodynamic equilibrium properties, such as solute solubility in the mobile phase and the solute distribution coefficient between the solid matrix and pseudo-liquid surface in the stationary phase for both supercritical fluid and ambient pressure extractions. In this model, the material balance of solute among the solid matrix, the pseudo-liquid surface and the mobile phase was satisfied at the given time step. The predictive mathematical form was obtained for proving the expression of many types of extraction curves. In addition, this model allows for adsorption isotherm equations instead of the solute distribution coefficient for expression of the extraction curves. In the future, this new model can be widely applied to the semi-batch extractions without kinetic parameters, such as mass transfer and diffusion coefficients, that were usually used in previous models.</p>

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