Turbulent operation of diesel oxidation catalysts for improved removal of particulate matter
Journal article, 2012

This paper proposes that a diesel oxidation catalyst (DOC) operating within the fully turbulent flow regime is an efficient means of reducing the contents of particulate matter in the exhaust gases. The suggested mode of operation is in contrast to the fact that the DOCs are typically operated within the laminar flow regime. In the paper, the particle trapping efficiency and pollutant conversion in turbulent ceramic DOCs are calculated using both mass-transfer correlations available in literature and computational fluid dynamics (CFD). It is shown that a turbulent DOC substantially increases the removal of small particulates from the exhaust gases. This indicates the potential of the aftertreatment system to comply with the forthcoming number-based emission legislations on particulate matter. In addition, the turbulent DOC can be used to optimize the overall performance of a combined system consisting of a DOC and a diesel particulate filter.

Chemical reactors

Particulate processes

Emission control



Fluid mechanics


Henrik Ström

Chalmers, Applied Mechanics, Fluid Dynamics

Competence Centre for Catalysis (KCK)

Srdjan Sasic

Chalmers, Applied Mechanics, Fluid Dynamics

Bengt Andersson

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Competence Centre for Catalysis (KCK)

Chemical Engineering Science

0009-2509 (ISSN)

Vol. 69 1 231-239

Driving Forces

Sustainable development

Subject Categories

Chemical Process Engineering

Chemical Engineering

Fluid Mechanics and Acoustics



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