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A kinetic model of standard selective catalytic reduction of NO by NH3 on two sites

Vladimir P. Zhdanov (Institutionen för teknisk fysik, Kemisk fysik ; Kompetenscentrum katalys (KCK))
Reaction Kinetics Mechanisms and Catalysis (1878-5190). Vol. 104 (2011), 2, p. 267-272.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Kinetics, Surface chemical reactions, Catalytic sites, Reaction orders, NO, NH(3), O(2), N(2), H(2)O, nitric-oxide, n2o decomposition, ammonia, fe-zsm-5, oxygen

Denna post skapades 2011-12-09. Senast ändrad 2013-02-05.
CPL Pubid: 149876


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kemisk fysik (1900-2015)
Kompetenscentrum katalys (KCK)



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