title: Characterization of particulate matter from diesel passenger cars tested on chassis dynamometers.
abstract: Emission characterization of particle number as well as particle mass from three diesel passenger cars equipped with diesel particulate filter (DPF), diesel oxidation catalyst (DOC) and exhaust gas recirculation (EGR) under the vehicle driving cycles and regulatory cycle. Total particle number emissions (PNEs) decreased gradually during speed-up of vehicle from 17.3 to 97.3km/hr. As the average vehicle speed increases, the size-segregated peak of particle number concentration shifts to smaller size ranges of particles. The correlation analysis with various particulate components such as particle number concentration (PNC), ultrafine particle number concentration (UFPNC) and particulate matter (PM) mass was conducted to compare gaseous compounds (CO, CO2, HC and NOx). The UFPNC and PM were not only emitted highly in Seoul during severe traffic jam conditions, but also have good correlation with hydrocarbons and NOxinfluencing high potential on secondary aerosol generation. The effect of the dilution temperature on total PNC under the New European Driving Cycle (NEDC), was slightly higher than the dilution ratio. In addition, the nuclei mode (DP: ≤13nm) was confirmed to be more sensitive to the dilution temperature rather than other particle size ranges. Comparison with particle composition between vehicle speed cycles and regulatory cycle showed that sulfate was slightly increased at regulatory cycle, while other components were relatively similar. During cold start test, semivolatile nucleation particles were increased due to effect of cold environment. Research on particle formation dependent on dilution conditions of diesel passenger cars under the NEDC is important to verify impact on vehicular traffic and secondary aerosol formation in Seoul.
authors.affiliation: Transportation Pollution Research Center, National Institute of Environmental Research, Incheon, Republic of Korea. Electronic address: actual77@korea.kr.
authors.forename: Sungwoon
authors.initials: S
authors.lastname: Jung
authors.affiliation: Division of Global Environment Research, National Institute of Environmental Research, Incheon, Republic of Korea.
authors.forename: Jaehyun
authors.initials: J
authors.lastname: Lim
authors.affiliation: Transportation Pollution Research Center, National Institute of Environmental Research, Incheon, Republic of Korea.
authors.forename: Sangil
authors.initials: S
authors.lastname: Kwon
authors.affiliation: Compliance & Defects Investigation Office, Korea Automobile Testing & Research Institute, Hwasung, Republic of Korea.
authors.forename: Sangwoo
authors.initials: S
authors.lastname: Jeon
authors.affiliation: Transportation Pollution Research Center, National Institute of Environmental Research, Incheon, Republic of Korea.
authors.forename: Jeongsoo
authors.initials: J
authors.lastname: Kim
authors.affiliation: Transportation Pollution Research Center, National Institute of Environmental Research, Incheon, Republic of Korea.
authors.forename: Jongtae
authors.initials: J
authors.lastname: Lee
authors.affiliation: Transportation Pollution Research Center, National Institute of Environmental Research, Incheon, Republic of Korea.
authors.forename: Sunmoon
authors.initials: S
authors.lastname: Kim
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D004784:Environmental Monitoring; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D001335:Vehicle Emissions
keywords: Correlation analysis; Diesel passenger cars; Particle number concentration; Particle number emissions; Ultrafine particle number concentration