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The performance of molecular sieve adsorption columns: systems with micropore diffusion control

โœ Scribed by D.R. Garg; D.M. Ruthven

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
772 KB
Volume
29
Category
Article
ISSN
0009-2509

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โœฆ Synopsis

Experimental saturation (adsorption) and regeneration (desorption) breakthrough curves are reported for a molecular sieve adsorption column operated isothermally under conditions of micropore diffusion control. For systems with a linear equilibrium isotherm, column performance may be adequately predicted from Rosen's theoretical analysis [9, lo]. The form of the breakthrough curves is very sensitive to quite small deviations from linearity and, for systems which exhibit a favourable Langmuir type of isotherm, regeneration is much slower than saturation under comparable conditions. These effects can be quantitatively accounted for by the non-linear model of Garg and Ruthven[l, 21. Equilibrium constants and diffusivities calculated from the breakthrough curves show satisfactory agreement with the values obtained from gravimetric measurements.

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Theoretical breakthrough curves for saturation and regeneration of a molecular sieve adsorption column are calculated from the solution of the appropriate diffusion equation for the case of micropore diffusion control. It is shown that with increasing non-linearity of the isotherm desorption becomes