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정근우(Keunwoo Chung),김영운(Young-wun Kim),황도혁(Do-Hyeuk Hwang),홍인석(In Seok Hong),김재현(Jae-Hyun Kim),강명구(Myung-Goo Kang) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
경유의 세탄가를 향상시켜 주는 새로운 구조의 세탄가향상제를 화학적으로 합성하고 이들의 유도 세탄가 측정을 통하여 경유연료의 세탄가 향상 효과를 기존 사용 첨가제인 2-EHN과 비교하였다. 새로이 합성한 후보물질들은 22-28%의 산소함량을 갖는 산소계 화합물로서 백색 고체 또는 무색의 오일형태로 얻어졌으며 경유에 대해 우수한 용해성을 나타내었다. 베이스 경유에 동일한 함량을 첨가하였을 때 기존 사용 첨가제인 2-EHN 대비 2배 이상의 매우 우수한 세탄가 향상효과를 나타냄을 확인할 수 있었으며 또 기존 첨가제에 혼합하여 사용하는 경우에도 세탄가가 크게 향상되는 효과를 나타내었다.
임영관(Young-Kwan Lim),원기요(Ki-Yoe Won),강병석(Byung-Seok Kang),박소휘(So-Hwi Park),박장민(Jang-Min Park),강대혁(Dea-Hyuk Kang) 한국트라이볼로지학회 2020 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.36 No.6
It rains heavily, such as long rain and typhoons, during a typical rainy season in Korea. In this season, several fuel contamination accidents by water and vehicular problems caused by water contaminated fuel occur. Many research groups have studied the effects of water contaminated fuel on vehicles and environment. However the characteristics of water contaminated fuel have not been studied. In this study, we prepared diesel samples with a constant ratio of water (0~30 volume %) using an emulsifier. Then, we analyzed these diesel samples for their representative fuel properties. In the analytical results, diesel with 30% water showed an increase in fuel properties such as density (823→883 ㎏/㎥), kinematic viscosity (2.601→6.345 ㎟/s), flash point (47→56℃), pour point (-22→2℃), CFPP (cold filter plugging point) (-17→20℃) and copper corrosion number (1a→2a). The low temperature characteristics, such as low pour point and CFPP, blocks the fuel filter in the cold season. In addition, water contaminated diesel decreases lubricity (190→410 ㎛) under high frequency reciprocating rig (HFRR) and derived cetane number (54.81→34.25). The low lubricity of fuel causes vehicle problem such as pump and injector damage owing to severe friction. In addition, the low cetane diesel fuel increases exhaust gases such as NOx and particulate matters (PM) owing to incomplete combustion. This study can be used to identify the problems caused by water contamination to vehicle and fuel facilities.