A Monte Carlo simulation for the catalytic oxidation of CO on DLA clusters

Monte Carlo studies of the dynamic behavior of the reduction reaction of NO by CO over a surface of clusters supported on a fractal

A Monte Carlo simulation study is made of the dynamic behavior of the reduction reaction of NO by CO, assuming an experimentally representative mechanism, over a catalytic substrate consisting of clusters of active sites supported on a fractal. Various empirical laws are found for the evolution in time of production over various cyclic graphs or trees that represent the various clusters of catalytic sites on the surface. An analysis is made of the phase diagrams and the production achieved versus concentration of the gas phase at different temperatures.

Brosilow-Ziff model for the CO-NO surface reaction on disordered two- and three-dimensional substrates

The Brosilow-Ziff model, which for a uniform lattice shows superficial poisoning by the "checkerboard mechanism" for simplified Langmuir-Hinshelwood kinetics of the reduction reaction of NO by CO, has been studied in the case of various disordered substrates: two-dimensional (2D) incipient percolation cluster, backbone, and diffusion-limited aggregate (2D) fractals, together with a deterministic fractal and a statistical substrate, both three-dimensional. Some additional effects such as diffusion, nearest-next-neighbor sites, and desorption are also considered. The systems were found to be nonreactive and pseudoreactive in all the cases which showed the checkerboard mechanism. Otherwise, a reactive zone (window) related directly to the geometric structure of the substrate is seen.