FIXED-BED TRANSITIONS


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<emphasis role="bold">FIXED-BED TRANSITIONS</emphasis>
<emphasis role="bold">FIXED-BED TRANSITIONS</emphasis>As discussed in “Design Concepts,” a large fraction of adsorption and ion-exchange processes takes place in fixed beds. Two classical methods for analyzing fixed-bed transitions are described here. First, local equilibrium theory is presented. In this, all mass-transfer resistances are ignored to focus on the often dominating role of isotherm shape. Second, results of constant pattern analysis are presented. This gives the maximum breadth to which a mass-transfer zone will spread for various rate mechanisms. It is therefore conservative for design purposes. Both of these methods pertain to behavior in deep beds. For shallow beds, the equat…
Citation
Don W. Green; Robert H. Perry: Perry's Chemical Engineers' Handbook, Eighth Edition. FIXED-BED TRANSITIONS, Chapter (McGraw-Hill Professional, 2008 1997 1984 1973 1963 1950 1941 1934), AccessEngineering Export