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Turbulent operation of diesel oxidation catalysts for improved removal of particulate matter

Henrik Ström (Institutionen för kemi- och bioteknik, Kemisk reaktionsteknik ; Kompetenscentrum katalys (KCK)) ; Srdjan Sasic (Institutionen för tillämpad mekanik, Strömningslära) ; Bengt Andersson (Institutionen för kemi- och bioteknik, Kemisk reaktionsteknik ; Kompetenscentrum katalys (KCK))
Chemical Engineering Science (0009-2509). Vol. 69 (2012), 1, p. 231-239.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Particulate processes, Chemical reactors, Environment, Turbulence, Emission control, Fluid mechanics



Denna post skapades 2011-10-21. Senast ändrad 2015-05-08.
CPL Pubid: 147592

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Kemisk reaktionsteknik (2005-2014)
Kompetenscentrum katalys (KCK)
Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Hållbar utveckling
Strömningsmekanik
Kemiteknik
Katalys
Molekylära transportprocesser i kemisk processteknik

Chalmers infrastruktur