Open AccessKinetic studies of competitive adsorption processes related to automobile catalytic converters
Author(s) -
Francisco Zaera,
Mark T. Paffett
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/562575
Subject(s) - adsorption , monte carlo method , catalysis , transition metal , process (computing) , converters , substrate (aquarium) , metal , kinetic monte carlo , materials science , thermodynamics , process engineering , chemistry , chemical engineering , nanotechnology , computer science , physics , engineering , mathematics , organic chemistry , metallurgy , power (physics) , statistics , oceanography , operating system , geology
This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The goal of this project was to study the microscopic details for the adsorption of CO, NO, and O{sub 2} on transition metal surfaces under conditions resembling those present in automobile catalytic converters. Initial sticking coefficients were measured as a function of temperature on transition metal single crystals by using a method originally developed by King and Wells. These measurements were performed under conditions emulating those typical of competitive adsorption, namely, where the substrate is exposed to a mixture of two or more gases simultaneously, or where one molecule is adsorbed on the surface prior to exposure to the second gas. The experimental results were then analyzed by using Monte Carlo computer simulation algorithm in an attempt to better understand the relevant aspects of the adsorption process