Size-resolved engine exhaust aerosol characteristics in a metal foam particulate filter for GDI light-duty vehicle

The particulate emissions generated from a side-mounted 2.4L gasoline direct injection (GDI) engine were evaluated using a metal foam-type gasoline particulate filter (GPF), placed on the downstream of a three-way catalyst. An ULEV legislation-compliant light-duty vehicle was tested under the new Eu...

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Bibliographic Details
Published in:Journal of aerosol science 2013-03, Vol.57, p.1-13
Main Authors: Choi, Kwanhee, Kim, Juwon, Ko, Ahyun, Myung, Cha-Lee, Park, Simsoo, Lee, Jeongmin
Format: Article
Language:English
Subjects:
Aerosols
Chemistry
Colloidal state and disperse state
Exact sciences and technology
Gasoline direct injection
Gasoline particulate filter
General and physical chemistry
Metal foam
Particle number concentration
Particle size distribution
Particulate matter
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Summary:The particulate emissions generated from a side-mounted 2.4L gasoline direct injection (GDI) engine were evaluated using a metal foam-type gasoline particulate filter (GPF), placed on the downstream of a three-way catalyst. An ULEV legislation-compliant light-duty vehicle was tested under the new European driving cycle (NEDC) and at constant-speed driving conditions. Particle number (PN) concentrations, particulate size distribution and the filtration efficiency of the GPF were evaluated with the condensation particle counter (CPC) and the differential mobility spectrometer (DMS). The PN emissions for the entire NEDC were 1.17E+12N/km for the base GDI vehicle and 4.99E+11N/km for the GPF-equipped GDI vehicle, and the filtration efficiency of the GPF was 57%. In particular, the number of sub-23nm particles formed in the GDI vehicle was substantially reduced, with 97% efficiency. The pressure drop in the metal foam-type GPF was constrained to be below 1.0kPa at a 120km/h vehicle speed, and as a result, the fuel economy and the CO2 emission for the GPF-applied vehicle were equivalent to those for the base vehicle. ► Particulate emissions from a GDI vehicle were evaluated with a metal foam GPF. ► The performance of the GPF was evaluated under the NEDC. ► PN were 1.17E+12N/km for the base vehicle, 4.99E+11N/km for the GPF-equipped case. ► The filtration efficiency of the GPF was 57% for the NEDC. ► Pressure drop in the GPF was 1.0kPa at 120km/h vehicle speed condition.
ISSN:0021-8502
1879-1964
DOI:10.1016/j.jaerosci.2012.11.002