Kinetic modeling of selective catalytic reduction of NOx with octane over Ag-Al2O3
Artikel i vetenskaplig tidskrift, 2009

A kinetic model for the selective catalytic reduction of NOx with octane over a Ag-Al2O3 catalyst was developed. Analysis of experimental data indicated that feed concentrations of NO and hydrogen had significant effects on the NOx conversion, indicating that nitrates poisoned the catalytic sites and hydrogen’s role was to reduce nitrate species. As a result nitrate poisoning was a key component of the kinetic model. Also in the model, gas phase n-octane reacted with surface oxygen to form surface hydrocarbon intermediate species that could either reduce surface NO2 species to nitrogen or be fully oxidized. An additional site was included in the model on which various oxidation reactions occurred when the NOx reduction site was fully poisoned by nitrate species. The model also accounted for experimentally observed large temperature increases due to hydrogen oxidation, during hydrogen feed. The model was constructed from transient experimental data, both with and without hydrogen feed and from a range of reactant concentrations and temperatures.

Ag-Al2O3

Kinetic modeling

n-Octane

SCR

NOx reduction

hydrogen effect

Författare

Derek Creaser

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Hannes Kannisto

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Jonas Sjöblom

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Hanna Härelind Ingelsten

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Applied Catalysis B: Environmental

0926-3373 (ISSN) 1873-3883 (eISSN)

Vol. 90 1-2 18-28

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik (2010-2017)

Transport

Energi

Materialvetenskap

Ämneskategorier

Kemiska processer

Kemiteknik

DOI

10.1016/j.apcatb.2009.02.005

Mer information

Senast uppdaterat

2018-11-05