Plachá, Marie;
Isoz, Martin;
Kočí, Petr;
Jones, Matthew P;
Svoboda, Miloš;
Eastwood, David S;
York, Andrew PE;
(2024)
Particle accumulation model in 3D reconstructed wall of a catalytic filter validated with time-resolved X-ray tomography.
Fuel
, 356
, Article 129603. 10.1016/j.fuel.2023.129603.
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Abstract
A transient pore-scale model of particle deposit formation in 3D microstructure of a catalytic filter wall is introduced. It predicts location of particle deposits, dynamics of their growth, transition from deep to cake filtration regime as well as the impact on flow field, pressure drop and filtration efficiency. The model is validated against time-resolved X-ray tomography (XRT) data acquired during a filtration experiment. The validated model is then used in transient simulations of the soot filtration process in several different microstructures using cordierite filter substrate with varied Pd/y-Al₂O₃ catalyst distribution. The sample with the coating solely inside the wall pores provides the lowest initial pressure drop but suffers from low clean filtration efficiency and high pressure drop after the cake is formed. The sample with partial on-wall coating achieves not only a higher filtration efficiency but also a lower pressure drop in long-term operation.
| Type: | Article |
|---|---|
| Title: | Particle accumulation model in 3D reconstructed wall of a catalytic filter validated with time-resolved X-ray tomography |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.fuel.2023.129603 |
| Publisher version: | https://doi.org/10.1016/j.fuel.2023.129603 |
| Language: | English |
| Additional information: | This version is the author-accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Mathematical modelling, CFD, DPF, GPF, Automotive exhaust gas aftertreatment |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10178913 |
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