Clustering and Melting in Multilayer Equilibrium Adsorption

✍ Scribed by G.F. Cerofolini; L. Meda

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 350 KB
• Volume: 202
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1997.5392

✦ Synopsis

ON THE 60TH ANNIVERSARY OF THE BET EQUATION embodying a set of parameters describing surface energetics An equation is proposed on theoretical grounds for the descripand topography, and (b) the determination of these parametion of isothermal equilibrium adsorption of vapors below their ters by matching experimental data. critical temperature on solid adsorbents. The proposed isotherm The typical probe for real adsorbents is the adsorption of behaves as the Brunauer-Emmett-Teller (BET) equation in the an inert vapor at a temperature T below its critical temperamonolayer region, the Anderson or Brunauer-Skalny-Bodor extenture T c . In this situation most of the adsorption isotherms sion of the BET equation just above the monolayer, and the Frenrun in one of the five types sketched in Fig. 1. These cases kel-Halsey-Hill equation at higher coverage. Given suitable choices follow from an early classification of Brunauer, Deming, of its free parameters, the equation accounts for all isotherms from type I to type V of Brunauer classification.