Fundamentals of supercritical extraction from a solid matrix /
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1991.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Abstract: | In this study, the solid/solute (adsorbent/adsorbate) interactions in supercritical extraction from a solid matrix (spherical pores alumina) are evaluated through determination of adsorption equilibria between dilute supercritical mixtures and the well characterized solid matrix. The adsorption equilibria between various non-volatile solutes dissolved in supercritical carbon dioxide and the solid matrix are measured by employing the dynamic tracer response technique. The partial molar volumes of the solutes at infinite dilution in the supercritical phase are extracted from the isothermal density dependence of the solubilities of these solutes in the supercritical phase. This information, combined with the isothermal density dependence of the adsorption equilibrium constants, enable the determination of the partial molar volumes of the solute at infinite dilution in the solid matrix. In addition to the adsorption equilibria, the transport and hydrodynamic parameters for supercritical extraction from solid matrices are studied, (a) the axial dispersion coefficient at extraction conditions and (b) the mass transfer coefficient, the adsorption rate constant, and the effective diffusivity of the solute at the same condition are determined, using real time fitting of the response curves via Fourier Series Expansion. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Chemical Engineering." |
| Physical Description: | xi, 182 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |