ADSORPTION EQUILIBRIA OF C-5-C-10 NORMAL-ALKANES IN SILICALITE CRYSTALS

Adsorption isotherms of n-pentane to n-decane were measured gravimetri cally on silicalite crystals at temperatures ranging from 30 to 150 de grees C and at pressures up to 1333 Pa. The virial equation was used t o correlate the experimental data and to calculate the Henry's law con stants and the heats of adsorption at zero loading. The limiting heats of adsorption of hexane and heptane are slightly higher than those re ported in literature. The isotherms of these two compounds also exhibi t an unusual convex region in a certain temperature range. The saturat ion capacities decrease from pentane to decane with a significant drop observed from heptane to octane.