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홍희경,문선희,서석준,김정화,정성운,정택호,홍유덕,성기재,김선문,Hong, Heekyoung,Mun, Sunhee,Seo, Seokjun,Kim, Jounghwa,Jung, Sungwoon,Chung, Taekho,Hong, Youdeog,Sung, Kijae,Kim, Sunmoon 한국액체미립화학회 2018 한국액체미립화학회지 Vol.23 No.2
Emission characteristics of regulated pollutants (CO, NOx, HC and PM) and hazardous air pollutants (HAPs) from diesel heavy duty trucks equipped with EGR+pDPF and SCR for Euro 5 emission standards were investigated using a chassis dynamometer. In the case of regulated pollutants, diesel heavy duty trucks with EGR+pDPF emitted 79% less CO than those with SCR. Also, those with the SCR emitted 36% less NOx than those with the EGR+pDPF. The results of VOCs have show that alkanes emissions for heavy duty trucks with the EGR+pDPF and the SCR have been higher than alkenes, cycloalkanes and aromatics. In the case of individual VOCs, the highest of propene emissions for 11.3~16.1% occupied. For aromatics group, benzene emissions are the highest percentage for 4.4~15.5%. In the future, the results of present study will provide basic data to set up HAPs emissions inventory for mobile source.
포스터 전시회 : 규제기준에 따른 경유 중형트럭의 미량유해물질 배출특성 연구
홍희경 ( Heekyoung Hong ),정성운 ( Sungwoon Jung ),손지환 ( Jihwan Son ),이상은 ( Sangeun Lee ),문선희 ( Sunhee Moon ),성기재 ( Kijae Sung ),김정수 ( Jeongsoo Kim ),김정화 ( Jounghwa Kim ) 한국액체미립화학회 2015 한국액체미립화학회 학술강연회 논문집 Vol.2015 No.-
As pollutants have been diversified with the acceleration and enhancement of industrial development, an interest in the criteria air contaminants including nitrogen dioxide, sulfur dioxide and dust emitted from heating and industrial facilities, and vehicles has recently been expanded to hazardous air pollutants (HAPs). Although only trace amount of HAPs are released in vehicle exhaust emissions, they have toxic, carcinogenic, bio-accumulative, persisting and diffusing characteristics, and the direct and long-term exposure to them may lead to adverse effects in humans, animals and plants. Particularly, diesel vehicles emit more pollutants if they are lager and become battered. While the number of registered medium-duty trucks is relatively low compared to the overall registered vehicles, their ratio has been steadily increasing. This study was designed to investigate the emission characteristics of unregulated pollutants (Aldehyde and VOCs) as well as regulated pollutants (CO, HC, NOx and PM) from diesel medium-duty trucks. The emission characteristics of unregulated and regulated pollutants were assessed based on regulation standards (EURO 4 and EURO 5) and intake weight (2.5 ton and 5 ton). The results show that unregulated and regulated pollutants remained almost unchanged at higher speeds but decreased at below 23.5 km/h. Reduction in unregulated and regulated pollutants was noticeable in vehicles of recent regulation standards and light intake weight. The analysis of aldehyde using UPLC showed that formaldehyde and acetaldehyde of aldehyde were most dominant. The GC/MS analysis showed that benzene, toluene, ethylbenzene and xylene of VOCs were over 80% followed by toluene, xylene, ethylbenzene and benzene. The results of present study will be contributed to set up HAPs inventory.
RV차량 및 소형승합차량의 휘발성유기화합물 배출특성 연구
문선희,홍희경,김선문,서석준,정성운,정택호,홍유덕,김정화,Mun, Sunhee,Hong, Heekyoung,Kim, Sunmoon,Seo, Seokjun,Jung, Sungwoon,Chung, Taekho,Hong, Youdeog,Kim, Jounghwa 한국액체미립화학회 2018 한국액체미립화학회지 Vol.23 No.2
Volatile organic compounds (VOCs) are well known as ozone precursors from photochemical reactions and contribute to the formation of photochemical smog which pose health hazards. Also, some of these compounds directly affect the human health due to their toxicity such as benzene. In this study, NMVOCs composition in exhaust gas from recreational vehicle (RV) and (MPV) were characterized using a chassis dynamometer. The results for NMVOCs have reported that alkanes emission was higher than alkenes, aromatics and cycloalkanes due to reactive of diesel oxidation catalysts. The NMVOCs composition according to carbon number was highly distributed between C3 and C6~C8. During the engine cold start condition, NMVOCs emission was higher compared to the engine hot start condition due to the increased catalytic activity. The NMVOCs emission with DPF increased compared to that without DPF. The results of this study will be provide to calculate VOCs emissions from mobile source.
포스터 전시회 : 연료첨가제 주입 전,후 승용차의 규제물질 배출현황
정성운 ( Sungwoon Jung ),손지환 ( Jihwan Son ),홍희경 ( Heekyoung Hong ),성기재 ( Kijae Sung ),김정수 ( Jeongsoo Kim ),김정화 ( Jounghwa Kim ) 한국액체미립화학회 2015 한국액체미립화학회 학술강연회 논문집 Vol.2015 No.-
This study was designed to investigate characterization of regulated pollutants (CO, HC, NOx and PM) emitted from 134 diesel and gasoline passenger cars based on emission standards according to fuel additives. The experiments using chassis dynamometer were conducted under NEDC and CVS-75 modes. Comparison for fuel additive management and test between Korea, USA, EU and Japan, Korea was more strict than others. For with/without fuel additives according to diesel emission standards, NOx of EURO 4 and EURO 5 showed a relatively similar tendency. In the case of PM reduction rate, EURO 5 was over 20% decreased than EURO 4. In the case of standard deviation/average ratio for gasoline vehicles, variation interval was big for LEV 23.3 ~ 58% and ULEV 31.6 ~ 56.4%. Following the imposition of stricter regulations (EURO 5 and ULEV), difference rate for standard deviation was big. Especially, in the case of diesel vehicles, difference rate for NOx 68% and PM 48% was the biggest. The results of present study will contribute to set up emission standards for Korean fuel additives.
가짜휘발유, 경유사용에 따른 유해대기오염물질 특성 조사
문선희(Sunshee Mun),임윤성(Yunsung Lim),이종태(Jongtae Lee),김선문(Sunmoon Kim),홍희경(Heekyoung Hong),김정수(Jungsoo Kim) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Recently, oil price are skyrocketing every day and an adulterations in the vehicle fuel have refused to yield at a gas station. From these reason, a serious air pollution problems and a harmful effect to human have been caused by the noxious emission gas. In this paper, the hazardous air pollutants characteristics in the gasoline and diesel vehicles according to adulterations of vehicle fuels were carried out in the CVS-75 and NEDC mode. It is revealed that the NOx and CO emission in the adulterations of vehicle fuels was increased but the fuel efficiency was decreased. In the hazardous air pollutants characteristics, the VOCs emissions in the adulterations of vehicle fuels showed higher level than these in the gasoline and diesel fuels.