A kinetic model of the hydrogen assisted selective catalytic reduction of NO with ammonia over Ag/Al2O3
Artikel i vetenskaplig tidskrift, 2013

A global kinetic model which describes H2-assisted NH3-SCR over an Ag/Al2O3 monolith catalyst has been developed. The intention is that the model can be applied for dosing NH3 and H2 to an Ag/Al2O3 catalyst in a real automotive application as well as contribute to an increased understanding of the reaction mechanism for NH3-SCR. Therefore, the model needs to be simple and accurately predict the conversion of NOx. The reduction of NO is described by a global reaction, with a molar stoichiometry between NO, NH3 and H2 of 1:1:2. Further reactions included in the model are the oxidation of NH3 to N2 and NO, oxidation of H2, and the adsorption and desorption of NH3. The model was fitted to the results of an NH3-TPD experiment, an NH3 oxidation experiment, and a series of H2-assisted NH3-SCR steady-state experiments. The model predicts the conversion of NOx well even during transient experiments.

NH3-SCR

H2

Ag/Al2O3

NOx reduction

global kinetic model

Författare

Stefanie Tamm

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Louise Olsson

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Kompetenscentrum katalys (KCK)

Sebastian Fogel

Danmarks Tekniske Universitet (DTU)

Haldor Topsoe

Pär Gabrielsson

Haldor Topsoe

Magnus Skoglundh

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

AICHE Journal

0001-1541 (ISSN) 1547-5905 (eISSN)

Vol. 59 11 4325-4333

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Ämneskategorier

Fysikalisk kemi

Kemiska processer

Fundament

Grundläggande vetenskaper

DOI

10.1002/aic.14170

Mer information

Senast uppdaterat

2018-03-27