Adsorption Dynamics of Organic Compounds and Water Vapor in Activated Carbon Beds
Autor: | W. Scot Appel, John E. Finn, M. Douglas LeVan, Nan Qi |
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Rok vydání: | 2006 |
Předmět: | |
Zdroj: | Industrial & Engineering Chemistry Research. 45:2303-2314 |
ISSN: | 1520-5045 0888-5885 |
Popis: | Breakthrough behavior is investigated for an activated carbon bed fed with constant concentrations of organic vapors and a stepped concentration of water vapor. The organics are present as single components and binary mixtures, with both hydrophobic and hydrophilic organics considered. Experiments are performed using a fully automated fixed-bed apparatus, which enables breakthrough curve studies for gas mixtures over a wide range of concentrations, from much less than 1 ppm up to saturation. The adsorbed-phase mass transfer coefficient of water is found to be a strong function of water loading. The system response is complex, with behaviors for hydrophilic and hydrophobic compounds being quite different. A model incorporating an accurate description of the highly nonideal adsorption equilibria is developed to simulate all of the fixed-bed experiments and gives good agreement in time, trend, extent, and shape of the breakthrough curves. |
Databáze: | OpenAIRE |
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