Gyutae Park

Physicochemical Characteristics of Particulate Matter Emissions of Different Vehicles` Fuel Types

The physicochemical characteristics of particulate matter emissions from various vehicle’s fuel types were studied at the facility of Transport Pollution Research Center (TPRC), National Institute of Environmental Research (NIER), Korea. Three different types of fuels such as gasoline, liquefied petroleum gas (LPG) and diesel were tested on the NIER driving mode and the constant speed modes (30, 70, and 110 km/h). Chemical composition of submicron particles from vehicle emissions was measured by the High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS) during running cycles. Organics were dominant chemical species of particulate matter emissions for all three different vehicles’ fuel types. Moreover, regardless of fuel types, emission rate of organics and inorganics decreased as the average speed of vehicle increased. The portion of fully oxidized fragment families of CxHyOz accounted for over 98% of organic aerosol (OA) in LPG and diesel vehicles, while the relatively high fraction of CxHy in OA was observed in gasoline vehicle.

Spacial Distribution of PM1.0 Major Compounds from Long Range Transport at the Baegryungdo Super Site: Relationship between PSCF and Cluster Analysis

The spacial potential source contribution function (PSCF) method was utilized by considering topography and height of back trajectories based on the measurement of organic typo matter (OM), NO3-, SO4, and NH4 + at the Baegryungdo Super Site (37°57′N, 124°37′E, 135 m a.s.l. (above sea level)) for three selected periods (i.e., January~ April, May~August, and September~December) in 2013. The PSCF were calculated on the contributions of transboundary transport to the hourly mean concentrations using a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS). The cluster analysis using back trajectories was performed to identify the major airflows to the sampling site. The upper atmosphere in the Tianjin area of China and the lower atmosphere in the western coast area of Korea can be the major source of trans-boundary pollution to the sampling site during January~April resulted from PSCF. The area in Lianyungang-city and Liaoning-sheng, China can be responsibile for the nitrogen related secondary compounds during May~August, and Shandong Peninsula in China is the major source area during September~December. In addition, relationships between the cluster analysis of back trajectories and PSCF were investigated for the statistically significance level for the source areas.

Evaluation on Emission Characteristics of Trace Hazardous Material from Motorcycle Exhaust by EURO III

Recently, the researches for air pollutant control technologies have been performing in Korea, while considering an one of the latest main topics as problems on air pollutant control. However, it is difficult to investigate emission amount of air pollutant by passenger cars, because of lack of the domestic information about mobile source; the number of research institutes are less in the whole. Especially, the informations on registered numbers and emissions of motorcycles are less. Thus, in this study, the analysis that is based on experimental results was conducted for finding out source profiling and emission characteristics on motorcycles exhaust. For these experiments, the domestic motorcycles were chosen and evaluated by EURO III standard. From the result, controlled pollutants (CO, HC, NOx) were met to EURO III, but low displacement motorcycles showed a higher incomplete combustion reaction than that of 250 cc motorcycles. Additionally, uncontrolled pollutants (BTEX and 1,3-butadiene) were decreased with increasing a displacement of motorcycles. However, the emission trend of aldehydes was not followed that of those; the formaldehyde ratio increased upto approximately 33%, with increasing a displacement of motorcycles. In the future, it would be used to support the CAPSS as basic data of Korea.

The Characteristics of Spray and Exhaust Emissions Environmental Assessment of Adulteration and Convention Diesel

Abstract Adulterations fuel have been using in the vehicle in these days. Because gasoline, diesel prices are rising every day. sopeople find more cheap price fuel. Adulterations fuel caused a serious air pollution problems. Adulteration fuel were madefrom waste engine oil, waste paint. According to Government regulations permit to be used recycle fuel(adulteration fuel)only in industrial boiler. Unburned fuel pollutants are effected to human health. In this paper, the hazardous air pollutantscharacteristics in the diesel vehicles according to adulterations of vehicle fuels were carried out in the NEDC test mode inchassis dynamometer. It is revealed that the all of the regulation pollutants (THC, NOx, CO and PM) emission in the adul-terations of vehicle fuels was increased also the green house gas, CO 2 was increased. In the hazardous air pollutants char-acteristics, the VOCs(Volitile Organic Compounds) BTEX(Benzene, Toluene, Ethylbenzene, Xylene) emissions in the adulterationsof vehicle fuels showed higher level than these in the diesel fuels.