Model for the catalytic reduction of NO on a surface with species desorption and impurities that cannot desorb

Autor:	E. J. Hernández, G. M. Buendía
Rok vydání:	2021
Předmět:	Surface (mathematics) Materials science Impurity Desorption Thermodynamics Statistical and Nonlinear Physics Selective catalytic reduction Kinetic Monte Carlo Condensed Matter Physics
Zdroj:	International Journal of Modern Physics B. 36
ISSN:	1793-6578 0217-9792
DOI:	10.1142/s0217979222400021
Popis:	The dynamical behavior of a modified Yaldram–Khan model for the catalytic reduction of NO on a surface is studied by Kinetic Monte Carlo simulations. In this modified model, temperature effects are incorporated as desorption rates of the N and CO species. How the presence of contaminants in the gas phase affects the catalytic process is also analyzed by including impurities that can be adsorbed on the lattice and once there remain inert. When N desorption is included, a reactive window appears that is not present in the original YK model on a square lattice. When CO desorption is added large fluctuations appear in the coverages, the system can take a long time to stabilize, during this period, a long lasting reactive state exists that disappears when the stability is reached. When nondesorbing impurities are added, the discontinuous transition to a CO poisoned phase that presents the original YK model disappears, the coverages become continuous, and a nonreactive steady-state is rapidly reached.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e099ff4d9df6f18c06bf06a07314fd92 https://doi.org/10.1142/s0217979222400021 Zobrazit plný text záznamu