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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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18.3.3 Simulated Moving Beds (SMB)

Most adsorption processes remove all adsorbed solutes from a nonadsorbed or weakly adsorbed carrier gas or solvent. Elution chromatography, on the other hand, was developed to separate a number of solutes from each other with all of the products containing the carrier gas or solvent. Simulated moving bed (SMB) technology is a melding of purge or displacement adsorption and chromatographic methods that was developed by UOP in the late 1950s and early 1960s (Broughton and Gerhold, 1961; Broughton et al., 1970). SMBs are currently extensively used for binary separations. Although gas-phase systems have been studied, all current commercial applications are liquid-phase (see Problem 18.A6). Common industrial applications ...

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