CHROMATOGRAPHIC STUDY OF ALKANES IN SILICALITE - EQUILIBRIUM PROPERTIES

Variations of perturbation chromatography were used to measure Henry's constants and equilibrium isotherms of various gases on silicalite. T hree different adsorbent samples were analyzed (commercial powder and extruded pellets, and laboratory-synthesized crystals), and no discern able differences among the measured parameters were noted. Henry's con stants for the linear alkanes were determined from isobaric and noniso baric chromatography experiments. They were correlated successfully wi th temperature and the number of carbon atoms per adsorbate molecule. Isotherms were measured from concentration pulse or tracer/concentrati on pulse chromatography techniques. The Flory-Huggins version of the v acancy solution model was used to correlate pure gas isotherms and pre dict binary behavior successfully.