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Chapter 2 Pressure Swing Adsorption Synopsis Pressure Swing Adsorption (PSA) is an adsorption-based separation process where an adsor- bent preferentially adsorbs one component (or a family of related components) from a feed mixture, thus achieving separation. To understand the design and operation of PSA processes, knowledge of adsorption principles and dynamic behavior of an adsorption column is vital. We first provide a brief background on the adsorption phenomena and its fundamentals. Then we discuss adsorption modeling in a fixed bed which, besides comprising mass, momentum and energy conservation, also involves characterizing adsorption equilibrium behavior and mass transfer resistances affecting adsorption kinetics. Further, we describe the transient cyclic op- eration of a two-bed as well as a multi-bed multi-step PSA processes with examples. Numerical methodologies to simulate PSA processes and obtain solution for the bed model are also dis- cussed, which involve finite volume spatial discretization scheme which is mass conserving, avoids unphysical oscillations, and thus, is essential to simulate PSA bed models. Chapter 2. Pressure Swing Adsorption 11PDF Image | Design and Operation of Pressure Swing Adsorption Processes
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