Abstract

The influence of particle size and particle size distribution on permeability and hydrodynamic dispersion was studied as the first stage in the development of a numerical model of chromatographic processes. Permeability and hydrodynamic dispersion were measured and models were tested against the data obtained. The influence of the chromatographic column wall was minimized by using a wide column (d = 0.113 m). Nonporous glass beads of different sizes (d p(mean) = 125–250 µm) and size distributions (SD/d p(mean) = 0.06–0.21) were used as packing material. The longitudinal dispersion was measured between Pep numbers 3 and 430 by recording the response of a sodium chloride step input at four radial positions at each of three levels of electrodes inside the column. Permeability was measured at the same time; the Rep numbers lay between 0.004 and 0.6.

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