distallation - Seader & Henley, Separation Process...

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f01_1 Seader & Henley, Separation Process Principles 1
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Separation Processes Absorption – Solutes removed from a gas into a liquid • Solutes removed from liquid into gas is called stripping or desorption Distillation – Thermal vapor-liquid separation processes (Ch 11); vapor phase generated from liquid Liquid-liquid extraction – Solute extracted from liquid A into an immiscible liquid B (a solvent) Leaching (extraction) – Solute extracted from a solid into a solvent phase (liquid, dense gas, or supercritical fluid) Membrane processing – Molecules separated using a dense (non -porous film) or porous physical barrier Filtration – Suspended solids separated from a liquid or gas phase using a porous membrane 2
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Methanol more volatile than water P m > P w P m > 1 atm Vapor-liquid equilibria. .. (e.g. ideal , methanol-water system) BP diagram at const P (ideal) dew-point bubble-point x = y (1 component) x-y diagram at const P P (= p m + p w ) diagram at const T 3
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Ethanol more volatile γ e P e > h P h Ethanol less volatile e P e < h P h x = y at 58 o C Low T High T non-ideal , n-hexane-ethanol system) 4
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This note was uploaded on 02/23/2011 for the course CHEE 101 taught by Professor Ce during the Spring '11 term at University of Texas at Austin.

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distallation - Seader &amp; Henley, Separation Process...

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