Kinetic model of adsorption on crystal surfaces

A kinetic theory model describing physisorption and chemisorption of gas particles on a crystal surface is introduced. A single kinetic equation is used to model gas and physisorbed particles interacting with a crystal potential and colliding with phonons. The phonons are assumed to be at equilibriu...

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Veröffentlicht in:Physical review. E 2019-05, Vol.99 (5-1), p.052137-052137, Article 052137
Hauptverfasser: Aoki, Kazuo, Giovangigli, Vincent
Format: Artikel
Sprache:eng
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Zusammenfassung:A kinetic theory model describing physisorption and chemisorption of gas particles on a crystal surface is introduced. A single kinetic equation is used to model gas and physisorbed particles interacting with a crystal potential and colliding with phonons. The phonons are assumed to be at equilibrium and the physisorbate-gas equation is coupled to similar kinetic equations describing chemisorbed particles and crystal atoms on the surface. A kinetic entropy is introduced for the coupled system and the H theorem is established. Using the Chapman-Enskog method with a fluid scaling, the asymptotic structure of the adsorbate is investigated and fluid boundary conditions are derived from the kinetic model.
ISSN:2470-0045
2470-0053
DOI:10.1103/PhysRevE.99.052137