Abstract
Separation and purification of gaseous mixtures by adsorption has become a valuable tool in the chemical industry. Gas adsorption operations require information on both equilibrium and kinetics. Analytical equations are available to describe the adsorption of pure gases; mixture equilibria can be predicted by thermodynamic methods. Kinetic data suitable for column design can be expressed in terms of overall mass transfer coefficients. Design of columns for thermal swing adsorption (TSA) or pressure swing adsorption (PSA) processes requires the simultaneous solution of the partial differential equations for the material, energy and momentum balances describing the dynamics of adsorption in columns. Numerical solutions are usually required, but some useful analytical solutions are available for special cases.
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