Model investigations on the effect of energetic heterogeneity of column packings on the separation process in gas—solid chromatography

✍ Scribed by Roman Leboda

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 965 KB
• Volume: 178
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(00)92495-6

✦ Synopsis

The influence of energetic heterogeneity of adsorbents on their resolution ability, characterized by the separation coefficients, was investigated. Two analytical distribution functions were considered : the exponential function. corresponding to the Freundlich isotherm, and the quasi-gaussian function, corresponding to the Dubinin-Radushkewich isotherm. The numerical studies were concerned with the determination of selectivity coefficients for two consecutively eluted substances. which were characterized by the same analytical form of the energy distribution but by different parameters.

determining the shape of the distribution. The numerical results were compared with those obtained from a homo_geneous surface. In some instances the separation coefficient calculated for a heterogeneous surface is greater than that calculated for a homogeneous surface. characterized by the same value of the average adsorption energy.