info:eu-repo/semantics/article
Additional constraints in adsorption-desorption kinetics
Date
2009-02Registration in:
Manzi, Sergio Javier; Belardinelli, Rolando Elio; Costanza, Gregorio José; Pereyra, Victor Daniel; Additional constraints in adsorption-desorption kinetics; American Physical Society; Physical Review E: Statistical, Nonlinear and Soft Matter Physics; 79; 2; 2-2009; 1-10; 021103
1539-3755
CONICET Digital
CONICET
Author
Manzi, Sergio Javier
Belardinelli, Rolando Elio
Costanza, Gregorio José
Pereyra, Victor Daniel
Abstract
In this work, the adsorption-desorption kinetic in the framework of the lattice gas model is analyzed. The transition probabilities are written as an expansion of the occupation configurations. Due to that, the detail balance principle determine half of the adsorption Ai and desorption Di coefficients, consequently, different functional relations between them are proposed. Introducing additional constrains, it is demonstrated that when those coefficients are linearly related through a parameter γ, there are values of lateral interaction V, that lead to anomalous behavior in the adsorption isotherms, the sticking coefficient and the thermal programmed desorption spectra. Diagrams for the allowed values of V and γ are also shown. Alternatively, a more reliable formulation for the adsorption desorption kinetic based on the transition state theory is introduced. In such way the equilibrium and non equilibrium observables do not present anomalous or inconsistent behavior.