• Title/Summary/Keyword: Low sulfur fuel

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COMBINED EFFECTS OF BD20, LOW SULFUR DIESEL FUEL AND DIESEL OXIDATION CATALYST IN A HD DIESEL ENGINE

  • Baik, D.S.
    • International Journal of Automotive Technology
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    • v.7 no.6
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    • pp.653-658
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    • 2006
  • The enormous increase in the use of fossil energy sources throughout the world has caused severe air pollution and a depletion of energy. Besides, it seems very difficult to comply with the upcoming stringent emission standards in vehicles. In order to develop low emission engines, research on better qualified fuels as alternative fuels to secure high engine performance becomes a more important issue than ever. Since sulfur contained in diesel fuel is transformed in sulfate-laden particulate matters when a catalyst is applied, it is necessary to provide low sulfur fuels before any Pt-based oxidation catalysts are applied. But the excessive reduction of sulfur levels may cause the lubricity of fuel and engine performance to degrade. In this aspect, biodiesel fuel derived from rice bran is applied to compensate viscosity lost in the desulfurization treatment. This research is focused on the performance of an 11,000cc diesel engine and the emission characteristics by the introduction of ULSD(Ultra Low Sulfur Diesel), BD20(Diesel 80%+Biodiesel 20%) and a diesel oxidation catalyst, where BD20 is used to improve the lubricity of fuel in fuel injection systems as fuel additives or alternative fuels.

The Effect of Biodiesel and Ultra Low Sulfur Diesel Fuels on Emissions in 11,000 cc Heavy-Duty Diesel Engine

  • Baik, Doo-Sung;Han, Young-Chool
    • Journal of Mechanical Science and Technology
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    • v.19 no.3
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    • pp.870-876
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    • 2005
  • It seems very difficult to comply with upcoming stringent emission standards in vehicles. To develop low emission engines, better quality of automotive fuels must be achieved. Since sulfur contents in diesel fuels are transformed to sulfate-laden particulate matters as a catalyst is applied, it is necessary to provide low sulfur fuels before any Pt-based oxidation catalysts are applied. In general, flash point, distillation $90\%$ and cetane index are improved but viscosity can be worse in the process of desulfurization of diesel fuel. Excessive reduction of sulfur may cause to degrade viscosity of fuels and engine performance in fuel injection systems. This research focused on the performance of an 11,000 cc diesel engine and emission characteristics by the introduction of ULSD, bio-diesel and a diesel oxidation catalyst, where the bio-diesel was used to improve viscosity of fuels in fuel injection systems as fuel additives or alternative fuels.

EMISSION CHARACTERISTICS IN ULTRA LOW SULFUR DIESEL

  • Oh, S.-K.;Baik, D.-S.;Han, Y.C.
    • International Journal of Automotive Technology
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    • v.4 no.2
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    • pp.95-100
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    • 2003
  • Automobile industry has been developed rapidly as a key manufacturing industry in Korea. Meanwhile, air pollution is getting worse noticeably than ever. In the diesel emission, PM (Particulate Matter) and NOx (Nitrogen Oxides) have been exhausted with a great amount and the corresponding emission regulations are getting stringent. In order to develop low emission engines, it is necessary to research on better qualified fuels. Sulfur contained in fuel is transformed to sulfur compound by DOC (Diesel Oxidation Catalyst) and then it causes to the increase of sulfate-laden PM on the surface of catalyst. In this research, ULSD (Ultra Low Sulfur Diesel) is used as a fuel and some experimental results are investigated. ULSD can reduce not only PM but also gas materials because cetane value, flash point, distillation 90%, pour point and viscosity are improved in the process of desulfurization. However, excessively reduced sulfur may cause to decease lubricity of fuel and engine performance in fuel injection system. Therefore, it requires only modest adjusted amount of sulfur can improve engine performance and DOC, as well as decrease of emission.

Lubricating Characteristics of Diesel Fuel (경유의 윤활특성)

  • 신성철;강익중
    • Tribology and Lubricants
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    • v.16 no.5
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    • pp.332-340
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    • 2000
  • The reduction of sulfur content in the diesel fuel has caused the poor lubricity of diesel fuel in the distributor type injection pumps of diesel engines that use the diesel for lubrication of their moving parts. To investigate the reason for poor lubricity of low sulfur diesel fuels, the wear scar diameters by HFRR (High Frequency Reciprocating Rig) were measured on the diesel fuels from Korean markets and the results were compared with their physical and chemical properties. Also, the lubricity change and the improvement effects on lubricity additives for the ultra low sulfur diesel fuel, were made experimentally, that will be regulated to a maximum of 0.005 wt% from about 2005 were evaluated. As a result, a good correlation was found between the wear scar diameter and the polyaromatic compound which includes heterocyclic compound in the diesel fuel. It was also found that the content of polyaromatic compound including heterocyclic compound was affected by the amount of desulfurization treatment fraction. And the lubricity additives with ester base were more effective than that with acid base on the ultra low sulfur diesel fuel. Therefore, it is suggested that the factors affecting the lubricity stated above should be taken into account to improve the lubricity property of the diesel fuel in the refining process.

Effectiveness of Dispersants for Very-Low-Sulfur Fuel Oil (저유황유(VLSFO)의 유처리제 효용성 연구)

  • Kim, Deuksan;Seo, Jeong Mog;Ahn, Suhyun;Lee, Heejin
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.27 no.1
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    • pp.113-118
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    • 2021
  • The International Maritime Organization (IMO) has confirmed a global limit of 0.5 % for sulfur in fuel oil used on board ships with effect from January 1, 2020. Among various alternatives to respond to these regulations on sulfur content in fuel oil, such as LNG ships, SOx scrubbers, and very-low-sulfur fuel oil (VLSFO). VLSFO is preferred owing to its low investment costs. As more ships are expected to use VLSFO, VLSFO spills are expected to increase. In particular, when the seawater temperature is below the pour point of VLSFO, VLSFO solidifies when it is spilled, which makes controlling spills difficult. In this study, six types of VLSFO produced in Korea and one type of high-sulfur fuel oil (MF380) were compared in terms of the dispersibility of dispersants according to the seawater temperature conditions. The results confirmed that the six type of VLSFO did not satisfy the domestic standards for dispersant rate (60 % or more for 0.5 min, 20 % or more for 10 min). Morever, the dispersant rate of the six types of VLSFO was low compared with that of the high-sulfur fuel oil. The results of this study are expected to be used to set the direction of dispersant control in the case of VLSFO spills.

Emission Characteristics in The Application of ULSD, Biodiesel and DOC in Heavy Duty Diesel Engine (대형 디젤기관에서 초저유황경유, 바이오디젤 및 디젤산화촉매 적용시의 배기가스 특성)

  • Baik, Doo-Sung;Park, Man-Jae
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.28 no.1
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    • pp.52-58
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    • 2004
  • To develop a low emission engine, it is necessary to obtain some better quality of automotive fuels. Sulfur in fuel is transformed to sulfate-laden PM as DOC is applied. Therefore, it necessary to provide low sulfur fuels before DOC is applied. According to the specification of test fuels, flash point, distillation 90%, cetane index are improved but viscosity is decreased in the process of desulfurization. Excessively reduced sulfur may cause to decrease lubricity of fuel and engine performance in fuel injection system. Therefore, this research was emphasized how the application of Bio-diesel affects on the emission characteristics and engine performance under the circumstance of ULSD and DOC.

An Experimental Study on Emission Reduction by Low Sulfur Diesel Fuel in Diesel Oxidation Catalyst of Heavy Duty Diesel Engine (대형디젤기관의 디젤산화촉매장치에서 저유황 경유에 의한 배출가스 저감에 관한 실험적 연구)

  • 요용석;강호인;한영출
    • Transactions of the Korean Society of Automotive Engineers
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    • v.6 no.3
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    • pp.138-142
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    • 1998
  • Among aftertreatment devices which reduce exhaust gas of diesel engine, diesel oxidation catalyst(DOC) with high reduction efficiency for gaseous matter and particulate matter is now being studied actively. In this study, an experiment was conducted to analyze the effects of low sulfur diesel fuel in heavy duty diesel engine equipped with DOC. We tested to estimate change of engine performance for the low and high sulfur diesel fuels in a 11,000cc diesel engine equipped with DOC. We conducted test to estimate the reduction efficiency of exhaust gas in D-13 mode of heavy duty diesel regulation mode and in smoke opacity mode for two samples of high sulfur content (0.2%) and low sulfur content(0.05%)

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A Study on the Optimization of Fuel Allocation for the Management of Sulfur Dioxide Pollution (亞黃酸가스 汚染度 管理를 위한 燃料配分의 最適化에 관한 硏究)

  • 安徹;金丁勖
    • Journal of Korean Society for Atmospheric Environment
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    • v.2 no.1
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    • pp.103-110
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    • 1986
  • Since sulfur dioxide is released from the oxidation of sulfur in fuel, the level of $SO_2$ in industrial areas can be effectively managed by optimizing the allocation of fuels: the fuel should be allocated to each industries so as to achieve the air quality goal in the area with minimum fuel cost. The solution for this can be by solved using linear programming technique incorporated with the Gaussian dispersion equation. When this method was applied in Ulsan Industrial Complex, 39.3% of fuel expense could be saved compared with the present uniform fuel policy. With this method, bituminous coal generally was allocated to big emission sources such as power plants or to industries sparsely located in remote areas, and LPG or low-sulfur oils to small or medium-size sources in dense indurstrial aras. However, the particulates emission will increase with this policy, because it maximizes the use of coal within the limit to achieve the air quality goal in the area.

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A Study on Hazardous Air Pollutant Emissions From Diesel Engines Utilizing DME Fuel (DME를 이용한 경유자동차의 유해대기오염물질 발생 특성 연구)

  • Lim, Yun-Sung;Seo, Choong-Youl;Kwack, Soon-Chul;Lee, Jong-Tae;Park, Jung-Min;Kang, Dae-Il;Kim, Jong-Choon;Lee, Young-Jae;Pyo, Young-Duk;Lim, Yui-Soon;Dong, Jong-In
    • Journal of Korean Society for Atmospheric Environment
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    • v.22 no.1
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    • pp.53-61
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    • 2006
  • Recently, lots of researchers have been attracted to develop various alternative fuels and to use renewable fuels in order to solve the exhaust emission problems. DME (Dimethylether) is synthetic fuel, and can be produced from natural gas, coal and biomass. The emission is clean because it contains little sulfur and aromatic components In this study, the fuel was tested to investigate the applicability as an alternative fuel for diesel. This study was carried out by comparing the exhaust emissions and performance of diesel engine with DME, ULSD (ultra low sulfur diesel), LSD (low sulfur diesel) respectively. In order to measure regulated emissions, CO, $NO_{3}$, HC from vehicle different fuel types were used on chassis dynamometer CVS (constant volume sampler)-75 mode and EPA TO-I1A method was chosen for aldehydes analysis.

A Experimental Study on Exhaust Gas Reduction by Pt Loading in Oxidation Catalyst of Diesel Engine (디젤기관의 산화촉매에서 Pt 로딩량에 따른 배출가스 저감에 관한 실험적 연구)

  • 오용석
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.8 no.4
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    • pp.13-18
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    • 1999
  • Recently among after-treatment devices which have high possibility of utility diesel oxidation catalyst(DOC) is concerned over the world. DOC oxidizes pollutants by means of activate-reaction during by-passing in the catalyst in doing so conversion efficiency of PM, CO and HC is high and this device does not have an effect on engine performance because back pressure is not nearly increased, But as a small amount of sulfur content in fuel is oxidized it makes sulfate which is absorbed on the surface of catalyst. So in this study the experiment is carried out by means of using ordinary fuel(0.1wt%) and low sulfur fuel(0.05wt%) with DOC and the emission gas of diesel engine is measured.

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