• 한국산학기술학회논문지
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• 제10권6호
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• pp.1292-1297
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• 2009

본 연구에서는 고체 연료첨가제 제조기준 설정을 위해 연료에 첨가제 주입 시 발생될 수 있는 악영향을 고려하여 용해도, 용해속도 및 회분에 대한 실험을 실시하였다. 그 결과 용해도는 대상연료에 첨가제를 주입하기 전의 무게에 비하여 첨가제 주입 후 여과되는 무게가 증가하였으며, 여과필터의 Pore size가 증가함에 따라 여과되는 첨가제의 무게는 감소하는 것으로 나타났다. 용해속도 실험결과 상온에서 휘발유 1L에 1g의 첨가제를 용해시켰을 때, 2시간 이내에 모두 녹아 가장 빠른 용해속도를 보였고, 영하 $20^{\circ}C$의 경유에서는 72시간이 지나도록 변화가 거의 없었다. 회분 실험에서는 첨가제를 녹인 휘발유가 첨가제를 녹이지 않은 휘발유에 비해 28배 많은 양의 회분이 발생하였으며, 이로 인해 대부분의 회분은 첨가제로부터 생성된다는 것을 알 수 있었다.

• Environmental Analysis Health and Toxicology
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• 제21권2호
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• pp.93-102
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• 2006

Methyl tert-butyl ether (MTBE), an octane booster that is added to the reformulated gasoline, has been a widespread contaminant in aquatic ecosystem. MTBE is a recalcitrant pollutant having low biodegradability. Due to its higher water solubility and low octanol-water partition coefficient, it can be rapidly transported to the surrounding water environment. Also, MTBE is a known animal carcinogen, and is classified as a possible human carcinogen by U. S. Environmental Protection Agency. The adverse effect of MTBE to aquatic biota was widely reported. In Korea, the recent detection of MTBE in groundwater near gasoline filling stations has drawn concern to public health and ecosystem. To address this concern, the effect of MTBE to human health and ecosystem was discussed in this review. Also, ecotoxicity data of MTBE for fish, invertebrates, and algae were extensively compared to estimate the hazard concentration 5($HC_5$) of MTBE as a screening level.

• 한국산업보건학회지
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• 제25권2호
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• pp.156-165
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• 2015

Objectives: The purpose of this study was to investigate the possible effects of a gasoline vapor recovery system on personal exposure levels of gasoline vapor constituents including benzene, toluene, ethyl benzene, xylene(BTEX), and methyl tert-butyl ether(MTBE) among gas station workers in a metropolitan area. Methods: Thirty-one gas station workers at ten gas stations in a metropolitan area were selected as subjects for this study. Test method PV2028 as recommended in the OSHA process was used for sampling and analysis. Results: The personal exposure levels of benzene, toluene, ethyl benzene, xylene, MTBE and gasoline vapor in the gas station workers were $0.0018{\pm}0.0069ppm$, $0.0077{\pm}0.0137ppm$, $0.0002{\pm}0.0008ppm$, $0.0016{\pm}0.0084ppm$, $0.2619{\pm}0.3340ppm$, and $1.4940{\pm}1.7984ppm$, respectively. After adjustment for refueling frequency and volume, personal exposure levelswere higher in the gas stations where gasoline vapor recovery systems(Stage II) were not installed, but the results were not statistically significant. Gasoline vapor concentrations showed a positive correlation to the level of MTBE, a gasoline additive. Conclusions: Vapor recovery systems(Stage II) were effective not only in reducing emissions of air pollutants, but also in reducing exposure to hazardous substances among gas station workers. In addition, acorrelation between gasoline vapors and MTBE concentration was confirmed.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2003년도 총회 및 춘계학술발표회
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• pp.176-179
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• 2003

Fuel oxygenates, such as Methyl tertiary Butyl Ether (MTBE) is additive in gasoline used to reduce air pollution. Gasoline components and fuel additives can leak form underground storage tanks. MTBE is far more water soluble than gasoline hydrocarbons like BTEX then it travels at essentially the same velocity as groundwater. MTBE in drinking water causes taste and odor problems. Therefore, the purpose of the this study is to examine the ability of ground rubber to sorb MTBE form water. The study consisted of running both batch and column tests to determine the sorption capacity and the flow through utilization efficiency of ground rubber. The result of Column test indicate that ground tire rubber has on the 36% utilization rate. Finally, it is clear that ground rubber present an attractive and relatively inexpensive sorption medium for a MTBE. The Author thought that to determine the economic costs of ground rubber utilization, the cost to sorb a given mass of contaminant by ground rubber will have to be compared to currently accepted sorption media.

• 한국화재소방학회논문지
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• 제20권1호
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• pp.1-5
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• 2006

가연성 물질의 자연발화는 화재예방을 위한 중요한 인자가 된다. Gasoline과 Cenox의 최저발화온도는 시료량 $100{\mu}l$서 각각 $340.5^{\circ}C,\;368.5^{\circ}C$를 구하였다. 또한 순간발화온도는 발화되는 시간이 1.0 sec가 되는 온도인 $416^{\circ}C,\;427^{\circ}C$를 구하였다. 혼합물질에 대한 시료량과 최저발화온도는 Cenox 60 v/v% 이하 첨가시 최저발화온도의 변화는 적게 나타났으나, 80 v/v% 이상에서는 높게 나타났다. 따라서 가솔린 엔진의 연료로 사용시 Gasoline과 Cenox의 혼합비가 대단히 중요한 인자가 될 것으로 사료된다.

• Tribology and Lubricants
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• 제28권4호
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• pp.178-183
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• 2012

The fuel system of a vehicle is a very important compotent, as it provides the firing resources to the combustion chamber of the engine. However, improper operation of the system can generate bad condition or start-off during engine revolution. This study analyzed several examples of failure that had originated in the field. In the first example, the driver operated a vehicle containing both gasoline and LPG in the fuel tank, but the gasoline fuel remained unused for a few months. Therefore the fuel pump was clogged because of gasoline congelation. The second example, dealt with fuel leakage that occurred from the slightly torn O-ring connecting the fuel lines. The third example, pertained to engine damage and power-down owing to the usage of proor-quality fuel and ingredient. Therefore, it is necessary to take adequate measures to prevent the failure of the fuel system of vehicle.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2006년도 춘계학술대회 논문집
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• pp.100-101
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• 2006

• 대한지하수환경학회지
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• 제5권1호
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• pp.37-43
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• 1998

회분식 실험을 통해 가솔린의 용해거동을 살펴보았다. 먼저 가솔린 중 상평형에 이르기까지 개별성분들의 용해 kinetics를 살펴보았으며 평형에 도달한 후 각각의 용해도를 Raoult의 법칙을 이용하여 설명하고자 하였다. 또한 서로 다른 정도로 휘발시켜 가솔린의 조성을 변화시킨 후 개별성분들과 TPH의 용해도를 측정하여 비교하였다. 정적인 상태에서 가솔린의 개별성분들의 용해 kinetics는 일정한 양상을 보였으나 다만 첨가제로 사용된 MTBE의 경우 다른 성분들에 비해 평형도달시간이 길었다. 가솔린과 물의 상평형 상태에서 가솔린 개별성분들의 분배계수는 각각의 단일물질 용해도와 log-log선형관계를 보였으나 가솔린을 이상용액으로 간주해서 Raoult의 법칙을 적용했을 경우보다는 약간 낮은 경향을 보였다. 가솔린에있는 개별물질들의 농도는 휘발정도가 증가함에 따라 증가하다가 감소하는 경향을 보였는데 물로의 용해도 변화도 이와 거의 일치하는 양상을 보였다. 휘발정도가 증가할수록 용출농도는 초기에 급격히 감소하다가 이후 점근적으로 감소하는 경향을 보였으며 BTEX등 독성이 높은 지하수오염 규제물질들의 용출농도는 더욱더 빠르게 감소하였다. 이러한 결과를 가솔린 누출로 인한 지하수 오염의 시나리오에 적용해 볼 때 휘발에 의한 가솔린 제거는 지하수 오염의 잠재성과 오염된 지하수의 독성을 효과적으로 저감시키며 그 정도는 가솔린 절대량의 제거효율보다도 훨씬 크다는 것을 알 수 있다.

• 한국환경과학회지
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• 제25권6호
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• pp.757-766
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• 2016

MTBE and other gasoline additives contained in gasoline are known to be a refractory substance resistant to biodegradation. As a method of removing these substances, a research of method using native microbes of polluted soil was progressed and among these, bio-degradation possibility under aerobic condition was evaluated. All of the experiments were progressed based on batch experiment of lab scale and analyzed by GC-FID using HS-SPME technique. The result of bio-degradation experiment based on MTBE and other additives(ETBE, TAME) was observed below 1 mg/L, which initial concentration were 100 mg/L for each method. And through production of by-product and CO2, partial mineralization was confirmed. Degradation velocity of each additive was promptly represented in the order of TBA>ETBE>MTBE>TAME. Through this study, bio-degradation possibility of native microbes of oil polluted soil, MTBE and other gasoline additives was confirmed and it was considered that the result could be used for basic experiment data in removing oil pollutants of soil.

• 한국수소및신에너지학회논문집
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• 제30권5호
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• pp.428-435
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• 2019

A comparative evaluation of engine cleanliness was performed on the transport gasoline blended with bio- alcohols, and this study was considered to achieve the aim of greenhouse gas reduction in Korea. In particular, the fuel blended with bio-ethanol and bio-butanol showed the best engine cleaning performance both on combustion chamber deposits and intake valve deposits. The deposit control gasoline additive was effective to remove intake valve deposits. In contrast, the amount of combustion chamber deposits were tend to increase even though fuels blended with bio-alcohols were used. In overall, fuels blended with bio-alcohols, compared to fossil fuels, still showed outstanding performance in terms of engine cleanliness.