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The equilibrium constants assume the usual Arrhenius temperature dependencies: where and are the two pre-exponential constants for gas i, and and are the heat of adsorption of gas i on the two sites (or vertical interaction energy). Mathias et al. have demonstrated the accuracy of the DSL model for nitrogen/oxygen mixtures and zeolite 5A.23 LiLSX is similar enough to zeolite 5A to justify using DSL to describe binary equilibrium for this dissertation. 3.3 Adsorption Column Dynamics The ultimate separation efficiency is determined by adsorption equilibrium, which takes infinite time to achieve. Yet processes operate within a finite time frame. Adsorption kinetics determines the approach to equilibrium at any location in a column at a given time. This section reviews how adsorption kinetics affects column dynamics. An abundance of literature exists that provides far greater detail on this subject, specifically ones written by, Yang, Motoyuki, and Ruthven.9, 10, 24 3.3.1 Adsorption Rate An axially dispersed plug flow model is used in PSA modeling as the material balance for each component in a packed adsorption column. 41PDF Image | LIMITS OF SMALL SCALE PRESSURE SWING ADSORPTION
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