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Title: Deactivation of three-way catalysts coated within gasoline particulate filters by engine oil-derived chemicals

Abstract

Three-way catalysts (TWC) coated within gasoline particulate filter (GPF) walls (TWC/GPF) were tested in a gasoline direct injection (GDI) engine to investigate the impact of engine oil-derived chemicals on TWC performance and possible deactivation factors. Catalyst performance of the lab-aged TWC/GPFs was retarded with ash loading, especially NOx conversions under 300 °C. Characterization results from the lab-aging condition show that while the disruption of oxygen storage capacity (OSC) materials was found to be minor or negligible, Pd particle growth and weakened Pd–OSC interaction were observed. In comparison, the field-aged TWC/GPF showed more apparent degradation of TWC components due to engine-oil-derived chemicals; the formation of CePO 4 and Ce 2(SO 4) 4 results in decreasing OSC that lowers oxygen release capability, in addition to more noticeable Pd particle growth and weakened Pd–OSC interaction. Different from the lab-aged TWC/GPF, the degree of deactivation in the field-aged TWC/GPF appeared to increase along the direction of the flow path in the order of outlet > mid > inlet, proposing that engine-oil-derived chemicals accelerated TWC deactivation when combined with increased exhaust temperatures.

Authors:
 [1];  [1];  [1];  [1];  [2];  [2];  [3];  [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technologies (VTO); USDOE Office of Science (SC)
OSTI Identifier:
1529982
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Industrial and Engineering Chemistry Research
Additional Journal Information:
Journal Volume: 58; Journal Issue: 25; Journal ID: ISSN 0888-5885
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Seong, Heeje, Choi, Seungmok, Lee, Sungsik, Zaluzec, Nestor J., Toops, Todd, Lance, Michael J., Kim, Daekun, and Nguyen, Ke. Deactivation of three-way catalysts coated within gasoline particulate filters by engine oil-derived chemicals. United States: N. p., 2019. Web. doi:10.1021/acs.iecr.9b00342.
Seong, Heeje, Choi, Seungmok, Lee, Sungsik, Zaluzec, Nestor J., Toops, Todd, Lance, Michael J., Kim, Daekun, & Nguyen, Ke. Deactivation of three-way catalysts coated within gasoline particulate filters by engine oil-derived chemicals. United States. doi:10.1021/acs.iecr.9b00342.
Seong, Heeje, Choi, Seungmok, Lee, Sungsik, Zaluzec, Nestor J., Toops, Todd, Lance, Michael J., Kim, Daekun, and Nguyen, Ke. Mon . "Deactivation of three-way catalysts coated within gasoline particulate filters by engine oil-derived chemicals". United States. doi:10.1021/acs.iecr.9b00342.
@article{osti_1529982,
title = {Deactivation of three-way catalysts coated within gasoline particulate filters by engine oil-derived chemicals},
author = {Seong, Heeje and Choi, Seungmok and Lee, Sungsik and Zaluzec, Nestor J. and Toops, Todd and Lance, Michael J. and Kim, Daekun and Nguyen, Ke},
abstractNote = {Three-way catalysts (TWC) coated within gasoline particulate filter (GPF) walls (TWC/GPF) were tested in a gasoline direct injection (GDI) engine to investigate the impact of engine oil-derived chemicals on TWC performance and possible deactivation factors. Catalyst performance of the lab-aged TWC/GPFs was retarded with ash loading, especially NOx conversions under 300 °C. Characterization results from the lab-aging condition show that while the disruption of oxygen storage capacity (OSC) materials was found to be minor or negligible, Pd particle growth and weakened Pd–OSC interaction were observed. In comparison, the field-aged TWC/GPF showed more apparent degradation of TWC components due to engine-oil-derived chemicals; the formation of CePO4 and Ce2(SO4)4 results in decreasing OSC that lowers oxygen release capability, in addition to more noticeable Pd particle growth and weakened Pd–OSC interaction. Different from the lab-aged TWC/GPF, the degree of deactivation in the field-aged TWC/GPF appeared to increase along the direction of the flow path in the order of outlet > mid > inlet, proposing that engine-oil-derived chemicals accelerated TWC deactivation when combined with increased exhaust temperatures.},
doi = {10.1021/acs.iecr.9b00342},
journal = {Industrial and Engineering Chemistry Research},
number = 25,
volume = 58,
place = {United States},
year = {2019},
month = {6}
}

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This content will become publicly available on June 3, 2020
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