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Bypass-Simulated moving bed (BP-SMB) chromatography, a process characterized by the possibility of over-purifying either the raffinate or the extract product followed by blending with the feed, is studied. The BP-SMB provides additional degrees of freedom; the opportunity to increase productivity; increased robustness and operational flexibility compared to obtaining reduced purities directly from the SMB. Based on the local-equilibrium theory analysis, explicit equations to calculate productivity are derived for systems following a linear isotherm. Specific conditions under which the BP-SMB provides significant advantages are elucidated. The effect of column efficiency and feed concentration for systems following non-linear isotherms are studied using numerical simulations. The production of High-fructose corn syrup, an industrial application of BP-SMB, is analysed.

Breakthrough curves of N 2 , O 2 , and Ar on Silver exchanged titanosilicates (Ag-ETS-10) extrudates and granules were measured using a laboratory scale dynamic column breakthrough (DCB) apparatus. In order to investigate the dynamics of the mass transfer, effect of flow rate, temperature and pressure on the composition and temperature curves were studied. In a separate attempt, N 2 breakthrough curves on two columns filled with Ag-ETS-10 extrudates and granules with two different sizes were obtained. Influence of axial-dispersion, macropore, and film resistance within the column was investigated using fundamentals of mass transfer and fluid dynamics which assisted in classifying the dynamics of this separation. The experimental results indicated the rapid mass transfer and the potential for rapid cycles using Ag-ETS-10 for high-purity O 2 production. A fully predictive mathematical model was shown to describe the experimental curves to a high level of precision. Keywords Breakthrough experiment • Oxygen purification • Air separation • Titanosilicates Abbreviations b Parameter in Langmuir isotherm (m 3 mol −1) b 0 Parameter in Langmuir isotherm (m 3 mol −1) c Fluid phase concentration (mol m −3) C pa Specific heat capacity of the adsorbed phase (J mol −1 K −1) C pg Specific heat capacity of the gas phase (J mol −1 K −1) C ps Specific heat capacity of the adsorbent (J kg −1 K −1) C pw Specific heat capacity of the column wall (J kg −1 K −1) d Parameter in dual-site Langmuir isotherm (m 3 mol −1

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