Adsorption - Adsorption Technology Industrial Adsorbents...

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Adsorption Technology
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Industrial Adsorbents Four basic types of adsorbent Silica Gel Molecular Sieve (Zeolites) Activated Carbon Activated Alumina
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Energy Issues Physical Adsorption van der Waals forces Heat of adsorption ~ heat of condensation Temperature increases – adsorption decreases Chemical Adsorption Chemical bonds Heat of adsorption ~ heat of reaction Temperature increases – adsorption increases
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Equilibrium Concentration in fluid Concentration on solid Langmuir Isotherm
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Equilibrium Concentration in fluid Concentration on solid BET Isotherm
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Langmuir Isotherm Assumptions: All sites identical No interaction between absorbed molecules All adsorption occurs by the same mechanism Single layer of solute forms on surface loading actual V loading V pressure partial P where V P V K V P form linear or P K P K V V = = = + = + = max : 1 1 max max max max Slope = 1/ V max 1 / K V max P/ V P
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Slope = (C-1)/ C V max 1 / C V max P/ V ( P vap -P) P / P vap ( 29 ( 29 pressure vapor
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This note was uploaded on 04/17/2008 for the course CHE 363 taught by Professor Maynard during the Summer '08 term at University of Texas at Austin.

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Adsorption - Adsorption Technology Industrial Adsorbents...

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