Progression of soot cake layer properties during the systematic regeneration of diesel particulate filters measured with neutron tomography
Abstract
Although particulate filters (PFs) have been a key component of the emission control system for modern diesel engines, there remain significant questions about the basic regeneration behavior of the filters and how it changes with accumulation of increasing soot layers. This effort describes a systematic deposition and regeneration of particulate matter in 25-mm diameter × 76-mm long wall-flow PFs composed of silicon carbide (SiC) material. The initial soot distributions were analyzed for soot cake thickness using a nondestructive neutron imaging technique. With the PFs intact, it was then possible to sequentially regenerate the samples and reanalyze them, which was performed after nominal 20, 50, and 70 % regenerations. The loaded samples show a relatively uniform distribution of particulate with an increasing soot cake thickness and nearly identical initial density of 70 mg/cm3. Throughout regeneration, the soot cake thickness initially decreases significantly while the density increases to 80–90 mg/cm3. After ~50 % regeneration, the soot cake thickness stays relatively constant, but instead, the density decreases as pores open up in the layer (~35 mg/cm3 at 70 % regeneration). Here, complete regeneration initially occurs at the rear of the PF channels. With this information, a conceptual model of the regeneration is proposed.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Transportation Research Center (NTRC)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1185463
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Emission Control Science & Technology
- Additional Journal Information:
- Journal Volume: 1; Journal Issue: 1; Journal ID: ISSN 2199-3629
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; particulate filter; soot cake properties; neutron imaging; soot oxidation; regeneration
Citation Formats
Toops, Todd J., Pihl, Josh A., Finney, Charles E. A., Gregor, Jens, and Bilheux, Hassina. Progression of soot cake layer properties during the systematic regeneration of diesel particulate filters measured with neutron tomography. United States: N. p., 2015.
Web. doi:10.1007/s40825-014-0008-1.
Toops, Todd J., Pihl, Josh A., Finney, Charles E. A., Gregor, Jens, & Bilheux, Hassina. Progression of soot cake layer properties during the systematic regeneration of diesel particulate filters measured with neutron tomography. United States. https://doi.org/10.1007/s40825-014-0008-1
Toops, Todd J., Pihl, Josh A., Finney, Charles E. A., Gregor, Jens, and Bilheux, Hassina. Fri .
"Progression of soot cake layer properties during the systematic regeneration of diesel particulate filters measured with neutron tomography". United States. https://doi.org/10.1007/s40825-014-0008-1. https://www.osti.gov/servlets/purl/1185463.
@article{osti_1185463,
title = {Progression of soot cake layer properties during the systematic regeneration of diesel particulate filters measured with neutron tomography},
author = {Toops, Todd J. and Pihl, Josh A. and Finney, Charles E. A. and Gregor, Jens and Bilheux, Hassina},
abstractNote = {Although particulate filters (PFs) have been a key component of the emission control system for modern diesel engines, there remain significant questions about the basic regeneration behavior of the filters and how it changes with accumulation of increasing soot layers. This effort describes a systematic deposition and regeneration of particulate matter in 25-mm diameter × 76-mm long wall-flow PFs composed of silicon carbide (SiC) material. The initial soot distributions were analyzed for soot cake thickness using a nondestructive neutron imaging technique. With the PFs intact, it was then possible to sequentially regenerate the samples and reanalyze them, which was performed after nominal 20, 50, and 70 % regenerations. The loaded samples show a relatively uniform distribution of particulate with an increasing soot cake thickness and nearly identical initial density of 70 mg/cm3. Throughout regeneration, the soot cake thickness initially decreases significantly while the density increases to 80–90 mg/cm3. After ~50 % regeneration, the soot cake thickness stays relatively constant, but instead, the density decreases as pores open up in the layer (~35 mg/cm3 at 70 % regeneration). Here, complete regeneration initially occurs at the rear of the PF channels. With this information, a conceptual model of the regeneration is proposed.},
doi = {10.1007/s40825-014-0008-1},
journal = {Emission Control Science & Technology},
number = 1,
volume = 1,
place = {United States},
year = {Fri Jan 16 00:00:00 EST 2015},
month = {Fri Jan 16 00:00:00 EST 2015}
}
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