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Title: Importance of filter’s microstructure in dynamic filtration modeling of gasoline particulate filters (GPFs): Inhomogeneous porosity and pore size distribution

Abstract

The state-of-the-art multiscale modeling of GPFs including channel scale, wall scale, and pore scale is described. The microstructures of two GPFs were experimentally characterized. The pore size distributions of the GPFs were determined by mercury porosimetry. The porosity was measured by X-ray computed tomography (CT) and found to be inhomogeneous across the substrate wall. The significance of pore size distribution with respect to filtration performance was analyzed. The predictions of filtration efficiency were improved by including the pore size distribution in the filtration model. A dynamic heterogeneous multiscale filtration (HMF) model was utilized to simulate particulate filtration on a single channel particulate filter with realistic particulate emissions from a spark-ignition direct-injection (SIDI) gasoline engine. The dynamic evolution of filter’s microstructure and macroscopic filtration characteristics including mass- and number-based filtration efficiencies and pressure drop were predicted and discussed. The microstructure of the GPF substrate including inhomogeneous porosity and pore size distribution is found to significantly influence local particulate deposition inside the substrate and macroscopic filtration performance and is recommended to be resolved in the filtration model to simulate and evaluate the filtration performance of GPFs.

Authors:
ORCiD logo; ; ; ; ORCiD logo; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1438985
Report Number(s):
PNNL-SA-131440
Journal ID: ISSN 1385-8947; 48410; VT0401000
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemical Engineering Journal; Journal Volume: 338; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Gong, Jian, Stewart, Mark L., Zelenyuk, Alla, Strzelec, Andrea, Viswanathan, Sandeep, Rothamer, David A., Foster, David E., and Rutland, Christopher J.. Importance of filter’s microstructure in dynamic filtration modeling of gasoline particulate filters (GPFs): Inhomogeneous porosity and pore size distribution. United States: N. p., 2018. Web. doi:10.1016/j.cej.2018.01.006.
Gong, Jian, Stewart, Mark L., Zelenyuk, Alla, Strzelec, Andrea, Viswanathan, Sandeep, Rothamer, David A., Foster, David E., & Rutland, Christopher J.. Importance of filter’s microstructure in dynamic filtration modeling of gasoline particulate filters (GPFs): Inhomogeneous porosity and pore size distribution. United States. doi:10.1016/j.cej.2018.01.006.
Gong, Jian, Stewart, Mark L., Zelenyuk, Alla, Strzelec, Andrea, Viswanathan, Sandeep, Rothamer, David A., Foster, David E., and Rutland, Christopher J.. Sun . "Importance of filter’s microstructure in dynamic filtration modeling of gasoline particulate filters (GPFs): Inhomogeneous porosity and pore size distribution". United States. doi:10.1016/j.cej.2018.01.006.
@article{osti_1438985,
title = {Importance of filter’s microstructure in dynamic filtration modeling of gasoline particulate filters (GPFs): Inhomogeneous porosity and pore size distribution},
author = {Gong, Jian and Stewart, Mark L. and Zelenyuk, Alla and Strzelec, Andrea and Viswanathan, Sandeep and Rothamer, David A. and Foster, David E. and Rutland, Christopher J.},
abstractNote = {The state-of-the-art multiscale modeling of GPFs including channel scale, wall scale, and pore scale is described. The microstructures of two GPFs were experimentally characterized. The pore size distributions of the GPFs were determined by mercury porosimetry. The porosity was measured by X-ray computed tomography (CT) and found to be inhomogeneous across the substrate wall. The significance of pore size distribution with respect to filtration performance was analyzed. The predictions of filtration efficiency were improved by including the pore size distribution in the filtration model. A dynamic heterogeneous multiscale filtration (HMF) model was utilized to simulate particulate filtration on a single channel particulate filter with realistic particulate emissions from a spark-ignition direct-injection (SIDI) gasoline engine. The dynamic evolution of filter’s microstructure and macroscopic filtration characteristics including mass- and number-based filtration efficiencies and pressure drop were predicted and discussed. The microstructure of the GPF substrate including inhomogeneous porosity and pore size distribution is found to significantly influence local particulate deposition inside the substrate and macroscopic filtration performance and is recommended to be resolved in the filtration model to simulate and evaluate the filtration performance of GPFs.},
doi = {10.1016/j.cej.2018.01.006},
journal = {Chemical Engineering Journal},
number = C,
volume = 338,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2018},
month = {Sun Apr 01 00:00:00 EDT 2018}
}