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http://dx.doi.org/10.15435/JILASSKR.2018.23.4.175

Emission Characteristics of Hazardous Air Pollutants from Diesel Heavy Duty Buses for Euro 5 according to After-treatment Systems  

Hong, Heekyoung (국립환경과학원 교통환경연구소)
Mun, Sunhee (국립환경과학원 교통환경연구소)
Chung, Taekho (국립환경과학원 교통환경연구소)
Kim, Sunmoon (국립환경과학원 교통환경연구소)
Seo, Seokjun (국립환경과학원 교통환경연구소)
Kim, Jounghwa (국립환경과학원 교통환경연구소)
Jung, Sungwoon (국립환경과학원 교통환경연구소)
Hong, Youdeog (국립환경과학원 교통환경연구소)
Publication Information
Journal of ILASS-Korea / v.23, no.4, 2018 , pp. 175-184 More about this Journal
Abstract
Emission characteristics of regulated (NOx, PM, CO, NMHC) and unregulated (VOCs, aldehydes, PAHs) air pollutants were investigated for diesel heavy duty buses equipped with different after-treatment systems (DPF+EGR and SCR) under urban driving cycle. The combustion temperature and the working temperature of SCR catalysts were important to make impact on NOx emissions, whereas PM emissions were low. The alkane groups dominated NMVOCs emissions, making 42.6~59.4% of sum of the NMVOCs emissions. Especially, alkane emissions of DPF+EGR-equipped vehicle included DOC had 14.9~15.5% higher than those of SCR-equipped vehicle due to low efficiency of oxidation catalyst. In the case of individual NMVOCs, n-nonane and propylene emissions highly occupied for DPF+EGR and SCR, respectively. Formaldehyde emissions among aldehydes were the highest and PAHs emissions were hardly detected except naphthalene and phenanthrene. The NMHC speciation has been shown to be the highest of the formaldehyde ranged 20.8~21.5%. The results of this study will be contributed to establish Korean HAPs emission inventory for automobile source.
Keywords
Emission characteristics; VOCs; Aldehydes; PAHs; Diesel heavy duty buses; HAPs;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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