Mechanism and Kinetics Parameters of the Reduction Reaction of NO by CO on Pd/Al2O3 Catalyst

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• 作者：Joaquí ; n Cort&eacute ; s ; Eliana Valencia ; Jorge Herrera ; Paulo Araya
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：May 17, 2007
• 年：2007
• 卷：111
• 期：19
• 页码：7063 - 7070
• 全文大小：338K
• 年卷期：v.111,no.19(May 17, 2007)
• ISSN：1932-7455

文摘

By means of a mechanism similar to that used by Peden and Permana for the reduction reaction of NO byCO on Rh and the analytical solution of its kinetics equations, a set of kinetics parameters that interpret someexperimental results determined at moderate pressures for that reaction on palladium supported on aluminawere established. When using those parameters, the kinetics model, studied through the analytic solution ofthe kinetics equations and Monte Carlo simulations, presents various aspects of interest such as the maximumfound in experiments in the literature for production versus CO concentration or temperature and a changein the sign of reaction order with respect to CO and NO between the high- and low-temperature zones, andit shows the characteristic configurations of the adsorbed phase in the square and hexagonal cases. MonteCarlo simulations at high temperatures on a square lattice show a behavior similar to that of the classicalmodel of Brosilow-Ziff, with a phase poisoned with pairs of superficial nitrogens in a diagonal direction.