Kinetic modeling of selective catalytic reduction of NOx with octane over Ag-Al2O3
Journal article, 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

Author

Derek Creaser

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Hannes Kannisto

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Jonas Sjöblom

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Hanna Härelind Ingelsten

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Applied Catalysis B: Environmental

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

Vol. 90 1-2 18-28

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Chemical Process Engineering

Chemical Engineering

DOI

10.1016/j.apcatb.2009.02.005

More information

Latest update

11/5/2018