A kinetic model of standard selective catalytic reduction of NO by NH3 on two sites
Journal article, 2011
Reduction of NO by NH(3) in the presence of O(2) may occur on single Fe or Cu atoms or dimers incorporated into the inner walls of zeolite. One of the likely schemes of this reaction implies the formation of N(2) and H(2)O through the reaction of gas-phase NO and adsorbed NH(3). The steady-state kinetics corresponding to this scheme was recently analyzed by the author assuming that the reaction runs on single metal atoms. In this work, the author presents a model including two metal atoms. Under the practically important conditions, the kinetics predicted by the one- and two-site models are demonstrated to be similar. In particular, both models allow one to interpret the apparent reaction orders observed experimentally.
ammonia
O(2)
Catalytic sites
N(2)
Kinetics
H(2)O
oxygen
NO
nitric-oxide
NH(3)
n2o decomposition
fe-zsm-5
Surface chemical reactions
Reaction orders
Author
Vladimir Zhdanov
Chalmers, Applied Physics, Chemical Physics
Competence Centre for Catalysis (KCK)
Reaction Kinetics, Mechanisms and Catalysis
1878-5190 (ISSN) 18785204 (eISSN)
Vol. 104 2 267-272Subject Categories
Chemical Sciences
DOI
10.1007/s11144-011-0353-9