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Filtration and regeneration modeling for particulate filters with inhomogeneous wall structure

Paper ID Volume ID Publish Year Pages File Format Full-Text
55461 47054 2012 8 PDF Available
Title
Filtration and regeneration modeling for particulate filters with inhomogeneous wall structure
Abstract

A new advanced filtration model for diesel particulate filter (DPF) is presented. The model is able to account for the distribution of soot particle size and different material and filtration properties for non-homogeneous wall structures. The impact of a thin dense layer on top of the inlet channels of a DPF on filtration, pressure drop and passive regeneration is investigated using the model. In agreement with previous literature experimental studies, significant improvement in the filtration efficiency is shown. The increased pressure drop of the empty filter is quickly outbalanced during loading due to less soot accumulation inside the wall. The negative effect of the layer technology on passive regeneration of catalyzed filters is demonstrated by solving the reaction–diffusion equations in the wall.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (290 K)Download as PowerPoint slideHighlights► An advanced DPF filtration model for non-uniform wall structures is presented. ► Depth-filtration efficiency increases with application of a thin layer on top. ► Soot-loaded DPF pressure drop decreases if a thin layer is applied. ► Passive regeneration rates are reduced due to NO2 back-diffusion inhibition.

Keywords
Diesel engine; Exhaust after treatment; Filtration model; Oxidation
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Filtration and regeneration modeling for particulate filters with inhomogeneous wall structure
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 188, Issue 1, 1 July 2012, Pages 24–31
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us