Analytical Treatment of a Heterogeneous Reaction

J. L. Vicente, A. Maltz and E. E. Mola
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J. L. Vicente: INIFTA, División Química Teórica, Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
A. Maltz: INIFTA, División Química Teórica, Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina
E. E. Mola: INIFTA, División Química Teórica, Sucursal 4, Casilla de Correo 16, (1900) La Plata, Argentina

Surface Review and Letters (SRL), 1998, vol. 05, issue 02, 545-550

Abstract: An analytical method has been used to study the kinetics of a generic heterogeneous catalytic reaction, A + B → AB. This reaction includes the elementary steps of adsorption and desorption of reactants A and B, surface reaction through the Langmuir-Hinshelwood mechanism, and desorption of the product AB. Despite its simplicity, this analytical approach shows some of the general features observed by simulating the present mechanism on a largeN × Nlattice.5–7The rate of reaction depends on the rate of desorption of reactants with a maximum at a value similar to those found by performing heavy simulations. Coverage fluctuations of reactants, as a function of their rate of desorption on a 2 × 2 lattice, have a behavior similar to that found on largeN × Nlattices.

Date: 1998
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DOI: 10.1142/S0218625X9800092X

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