• Title, Summary, Keyword: diesel gas

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Discrimination of Gasoline and Diesel Fuels Using Oxide Semiconductor Gas Sensors

  • Moon, Young Kook;Shin, Min Sung;Jo, Young-Moo;Lim, Kyeorei;Lee, Jong-Heun
    • Journal of Sensor Science and Technology
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    • v.27 no.4
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    • pp.221-226
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    • 2018
  • Misfueling accidents significantly damage the engines of both gasoline and diesel vehicles, and should be avoided by rapid and accurate fuel discrimination. Gasoline fuel contains bioethanol. Thus, the detection of ethanol vapor produced by gasoline can be used to distinguish between gasoline and diesel. In the present study, Pt-doped $SnO_2$ hollow nanospheres, Mg-doped $In_2O_3$ hollow microspheres, and Pt-doped ZnO nanostructures have been used as gas sensors to discriminate between gasoline and diesel fuels. All three sensors are able to detect and discriminate between gases evaporating from gasoline and diesel. Among the sensors, the Mg-doped $In_2O_3$ hollow microspheres show a significant gas response (resistance ratio = 4.97) quickly (~3 s) after exposure to gasoline-evaporated gas at $225^{\circ}C$, but did not show any substantial response to diesel-evaporated gas. This demonstrates that gasoline and diesel fuels can be discriminated using small and cost-effective oxide semiconductor gas sensors.

Effects of the Amount of Natural Gas in Fuel Blends on the Exhaust Gas of the Diesel Engines (혼합연료의 천연가스량이 디젤기관의 배기가스에 미치는 영향)

  • 박명호;김성준
    • Transactions of the Korean Society of Automotive Engineers
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    • v.5 no.5
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    • pp.67-72
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    • 1997
  • The purpose of this study os to investigate how the natural gas in fuel blend influences the polutant emission of diesel engine. Four stroke cycle single cylinder engine is used for this experiment and four kind of fuel blends were made. Fuel blends show four different torque ratios between diesel oil and natural gas, which are 4 : 0. 3 : 1, 2 : 2 and 1 : 3. The constituents of exhaust gases of engine are analyzed for every fuel blend. The experimental results say that the mixing of natural gas into diesel fuel is an very effective way to reduce the amount of soot in the exhaust gas.

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Application of wasted soybean oil non-esterified on turbo-charged diesel engines with common rail fuel injection system (커먼레일 연료 분사 방식 과급 디젤기관에서 비에스테르화 폐식용유의 적용)

  • Jung, Suk-Ho;Kim, Kyong-Hyon;Lee, Han-Seong;Koh, Dae-Kwon
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.49 no.1
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    • pp.51-57
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    • 2013
  • A demand for bio-diesel oil increases as one of solution for exhaustion of fossil fuel and reduction of $CO_2$ emission, and research on bio-diesel is being carried out. Bio-diesel oil is mainly esterified from vegetable oil with methanol in order to use for fuel on diesel engine and has demerit that costs are increased as compared with directly using like non-esterified one. Bio-diesel oil within 3% mixed with gas oil is used at present, proportion of bio-diesel oil will be increase by 5% in future. We judged that wasted soybean oil non-esterified could be used on diesel engine with an electronic fuel injection according to previous researches with a mechanical fuel injection. A performance test using only gas oil, gas oil with esterified bio-diesel oil 5% and wasted soybean oil non-esterified 5% on diesel engine with the electronic fuel injection were carried out. It is noticed that gas oil with wasted soybean oil non-esterified 5% has more similar characteristics to gas oil than gas oil with esterified bio-diesel oil 5%.

Development of Economic Prediction Model for Internal Combustion Engine by Dual Fuel Generation (내연기관엔진의 가스혼소발전 경제성 예측모델 개발)

  • HUR, KWANG-BEOM;JANG, HYUCK-JUN;LEE, HYEONG-WON
    • Transactions of the Korean hydrogen and new energy society
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    • v.31 no.4
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    • pp.380-386
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    • 2020
  • This paper represents an analysis of the economic impact of firing natural gas/diesel and natural gas/by-product oil mixtures in diesel engine power plants. The objects of analysis is a power plant with electricity generation capacity (300 kW). Using performance data of original diesel engines, the fuel consumption characteristics of the duel fuel engines were simulated. Then, economic assessment was carried out using the performance data and the net present value method. A special focus was given to the evaluation of fuel cost saving when firing natural gas/diesel and natural gas/by-product oil mixtures instead of the pure diesel firing case. Analyses were performed by assuming fuel price changes in the market as well as by using current prices. The analysis results showed that co-firing of natural gas/diesel and natural gas/by-product oil would provide considerable fuel cost saving, leading to meaningful economic benefits.

Development of Conversion Technology of a Decrepit Diesel Vehicle to the Dedicated Natural Gas Vehicle (노후 디젤차량으로부터 전소 천연가스자동차로의 개조 기술 개발)

  • Ryu, Kyung-Hyun;Kim, Bong-Kyu
    • Transactions of the Korean Society of Automotive Engineers
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    • v.14 no.6
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    • pp.73-81
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    • 2006
  • A commercial diesel engine was converted into a dedicated natural gas engine to reduce the exhaust emissions in a retrofit of a diesel-fueled vehicle. The cylinder head and piston were remodeled into engine parts suited for a spark ignition engine using natural gas. The remodeling of the combustion chamber changed the compression ratio from 21.5 to 10.5. A multi-point port injection(MPI) system for a dedicated natural gas engine was also adopted to increase the engine power and torque through improved volumetric efficiency, to allow a rapid engine response to changes in throttle position, and to control the precise equivalence ratio during cold-start and engine warm-up. The performance and exhaust emissions of the retrofitted natural gas engine after remodeling a diesel engine are investigated. The emissions of the retrofitted natural gas engine were low enough to satisfy the limits for a transitional low emission vehicle(TLEV) in Korea. We concluded that a diesel engine can be effectively converted into a dedicated natural gas engine without any deterioration in engine performance or exhaust emissions.

A study on power improvement emission characteristics of marine diesel engine with response power 200HP turbocharger (대응출력 200마력 과급기에 의한 디젤기관의 출력향상 및 배출특성에 관한 연구)

  • Lee, Chi-Woo
    • Journal of Advanced Marine Engineering and Technology
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    • v.38 no.1
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    • pp.23-30
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    • 2014
  • To improve efficiency of diesel engine which requests high output recently and is used all kinds of industrial areas, this thesis experimented dynamic characteristics and exhaust gas characteristics of diesel engine installed by supercharger of correspondent output 200HP and natural inhalation diesel engine through the dynamometer and exhaust gas analyzer in same condition. As the result of experiment with natural inhalation diesel engine and diesel engine installed by supercharger, there were a few differences of output, but dynamic characteristics at high speed showed increased output and efficiency of the engine installed by supercharger. On the contrary, in exhaust gas characteristics, the model installed by supercharger showed increased exhaust gas such as $NO_X$, $O_2$, etc, but added value of exhaust gas is low if considering $CO_2$ reduction and efficiency of dynamic characteristic's increase. Based on the results, diesel engine installed by supercharger is expected to show higher economic feasibility than natural inhalation diesel than natural inhalation engine from an angle of efficiency. Keywords: 200hp class Turbocharger, Exhaust Gas, Engine Performance, Marine Diesel Engine.

Research of Natural Gas/Diesel Dual Fuel Vehicle (CRDI시스템을 갖는 천연가스/디젤 혼소차량의 개발에 대한 연구)

  • Lee, Sang-Min;Lim, Ock-Taeck
    • Transactions of the Korean Society of Automotive Engineers
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    • v.20 no.5
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    • pp.13-18
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    • 2012
  • This research is about the exhaust gas and driving performance test which are for CNG-Diesel dual fuel engine. The CNG-Diesel dual fuel engine converted from 2500cc diesel has two steps of injection systems; small amount of diesel is injected to mixture CNG in cylinder to ignite before CNG is injected into each intake manifold to form mixture. The amounts of output power and emission in duel fuel consumption were measured by engine dynamometer and exhaust gas analyzer. Over 90% of diesel consumption reduction, similar driving performance to current diesel engine and reduced emission on $CO_2$ and PM, respectively, were indicated through the measurements. The two steps of system were applied to vehicle to investigate exhaust gas characteristics and driving performance via NEDC mode and real driving test. Additional oxidation catalyst was applied to reduce emission on the test vehicle and the NEDC mode test showed the reduction of Co, $CO_2$, Pm and THC.

An Experimental study on Analysis of Hydrocarbon of Exhaust gas Using Oxygenated Fuels by Gas Chromatography in Diesel Engine (디젤기관의 배기 배출물 중 가스 크로마토그래피를 이용한 탄화수소분석에 관한 실험적 연구)

  • Choi, S.H.;Oh, Y.T.
    • Journal of Power System Engineering
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    • v.4 no.3
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    • pp.12-18
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    • 2000
  • Recently, our world is faced with very serious and hard problems related to the air pollution due to the exhaust emissions of the diesel engine. So, lots of researchers have studied to reduce the exhaust emissions with various methods of diesel engine that influenced the environment strong. In this paper, the quantities of the low and high hydrocarbon among the exhaust emissions in diesel engine have been investigated by the quantitative analysis of the hydrocarbon $C_1{\sim}C_6$ using the gas chromatography. This study carried out by comparing the chromatogram with diesel fuel and three kinds of mixed fuels. One is the diesel fuel blended DGM(diethylene glycol dimethyl ether) 5%. Another is the diesel fuel blended DEE(diethyl ether) 25% and DMC(dimethyl carbonate) 10%. The results of this study show that the hydrocarbon $C_1{\sim}C_6$ among the exhaust emissions of the mixed fuels are exhausted lower than those of the diesel fuel at the all load and speed.

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A Study on Performance and Exhaust Emission with Bio-Diesel and ULSD at Heavy-Duty Diesel Engine (대형디젤기관에서 바이오디젤과 초저유황경유 사용에 의한 성능 및 배출가스에 미치는 영향에 관한 연구)

  • 박만재
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.12 no.6
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    • pp.97-103
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    • 2003
  • Currently, due to serious increase of pollution scones, lots of technology has been involved to reduce exhaust gas in diesel engine. But the amounts of exhaust gas can not be decreased somehow due to the increase of diesel vehicles. Moreover, emission standards of each counties are being stringent in advanced countries such as USA and Europe. In the near future, sulfur contents in fuel must be essentially reduced f3r health and environment because sulfur can basically reduce exhaust gas. Therefore, when will be applied to Bio-diesel and ULSD, they could reduce sulfur contents of fuel without aftertreatment and might conform the influence of engine performance, emission, smoke and fuel consumption.

The Experimental Study on Emission Reduction by Oxygenate Additive in D.I. Diesel Engine (직접분사식 디젤기관에서 함산소계 첨가에 의한 배출가스 저감에 관한 실험적 연구)

  • 최승훈;오영택
    • Transactions of the Korean Society of Automotive Engineers
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    • v.10 no.4
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    • pp.33-42
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    • 2002
  • Recently, our world is faced with very serious and hard problems related to the air pollution due to the exhaust emissions of the diesel engine. In this paper, the effect of oxygen component in fuel on the exhaust emissions has been investigated fur direct injection diesel engine. It was tested to estimate change of engine performance and exhaust emission characteristics for the commercial diesel fuel and oxygenate blended fuel which has three kinds of mixed ratio. And, it was tried to analyze not only total hydrocarbon but individual hydrocarbon components from Cl to C6 in exhaust gas using gas chromatography to seek the reason far remarkable reduction of smoke emission. This study was carried out by comparing the chromatogram with diesel fuel and diesel feel blended DGM(diethylene glycol dimethyl ether) 5%. The results of this study show that individual hydrocarbon(C1∼C6) as well as total hydrocarbon of oxygenated fuel is reduced remarkably than that of diesel fuel.