• Title/Summary/Keyword: Emission Regulation

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Estimating On-road NOx Emissions of Euro 6 Light-duty Diesel Vehicles (Euro6 소형 경유자동차의 실제 도로 주행 NOx 배출량 평가)

  • Park, Yeon-Jae;Park, Junhong;Lee, Jai-Young
    • Journal of ILASS-Korea
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    • v.21 no.4
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    • pp.207-213
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    • 2016
  • To protect air pollution of urban area from motor vehicles, emission limits for diesel vehicles have been dramatically lowered in short period. But recent studies have shown that on-road NOx emissions of light-duty diesel vehicles are considerably higher than the values measured with laboratory test procedures used for emission certification. To tackle with this issue, Ministry of Environment have a plan to introduce EU RDE-LDV (Real-driving Emission-Light-duty Vehicle) regulation. In this study, 4 Euro 6 diesel vehicles have been tested with the new test procedures published by EU to estimate on-road NOx emissions using PEMS (Portable Emission Measurement System). The results have shown that the requirements of EU RDE-LDV could be met in driving condition of metropolitan area for constitution of test routes and validity of test results. In analysing with Moving Averaging Window method the completeness and normality of test data were validated with the requirement. On-road NOx emissions were quite deviated as test vehicles and higher than the new limit of on-road NOx emission enforced from Sept. 2017, which means that RDE-LDV can effectively reduce NOx emission of diesel vehicles in real driving conditions of Korea.

Regulation of Ethylene Emission in Tomato (Lycopersicon esculentum Mill.) and Red Pepper (Capsicum annuum L.) Inoculated with ACC Deaminase Producing Methylobacterium spp.

  • Yim, Woo-Jong;Woo, Sung-Man;Kim, Ki-Yoon;Sa, Tong-Min
    • Korean Journal of Soil Science and Fertilizer
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    • v.45 no.1
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    • pp.37-42
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    • 2012
  • Improvement of plant growth by Methylotrophic bacteria can be influenced through alterations in growth modulating enzymes or hormones, especially by decreasing ethylene levels enzymatically by 1-aminocyclopropane-1-carboxylate (ACC) deaminase or by production of indole-3-acetic acid (IAA). In this study, the effect of seven strains of Methylobacterium on seedling ethylene emission of tomato and red pepper plants was evaluated under greenhouse condition. Ethylene emission was lowest in Methylobacterium oryzae CBMB20 inoculated tomato plants and CBMB110 inoculated red pepper plants at 47 days after sowing (DAS). However, at 58 DAS all inoculated plants showed almost similar pattern of ethylene emission. Methylobacterium inoculated tomato and red pepper plants showed significantly less ethylene emission compared to control. Our results demonstrated that Methylobacterium spp. inoculation promotes plant growth due to the reduction of ethylene emission and therefore can be potentially used in sustainable agriculture production systems.

NOx Emission Characteristic according to Aging of EGR Cooler in Non-Road Diesel Engine (EGR 적용 비도로 엔진의 쿨러 열화에 따른 질소산화물 배출특성)

  • Lee, Kyoung-Bok;Oh, Kwang-Chul
    • Journal of Power System Engineering
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    • v.20 no.5
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    • pp.37-45
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    • 2016
  • Exhaust gas recirculation has the advantage of being low-cost and easy to control of NOx emission. Therefore, it is most generally used to reduce NOx emission according to strengthen regulation. In the case of a non-road engine, such as the agricultural engine, since it mainly operate a middle or high-load state, NOx emission is decreased in accordance with the mapping range of the EGR rate, but results in an increase in the particulate matter which is caused to deposit and fouling problem of the EGR system. This problem has become an important issue for maintaining the performance of the engine, as well as emission performance. This study had examined the effects of cooler aging on the performance of heat transfer efficiency and NOx emission in non-road diesel engine. As a result of the EGR cooler aging during 200 hours engine operation, the cooling performance decreased about 25% compared with that of fresh cooler and the NOx emission increased about 14.6% on NRSC(non-road steady cycle) and 20% on NRTC(non-road transient cycle) compared with that of fresh cooler respectively.

A Study on the Reduction of Diesel-Engine Emissions (디젤엔진 배기가스의 저감에 관한 연구)

  • Hur, Youn-Bok;Chung, Soon-Suk;Kim, Kwang-Soo
    • Proceedings of the Safety Management and Science Conference
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    • 2012.11a
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    • pp.245-252
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    • 2012
  • Internal engine is the main power source of vehicle and is the main source of air pollution. To satisfy this getting rigorous emission regulation, it must be solved simultaneously the dilemma of reducing emission gas and increasing heat efficiency. Diesel engine is preferred compare with gasoline engine in aspect of energy consumption but it must be solved reducing the containing of NOx, CO and HC. In this study 1. Looking for alternative of performance improvement of Exhaust Gas Recirculation(EGR) which is emission gas reduction system, 2. Reducing malfunction of controlling emission gas 3. Made possible precision control.

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An Experimental Study on Exhaust Gas Reduction of Diesel Oxidation Catalyst by CVS-75 Mode in Light Duty Diesel Engine (小型디젤機關에서 CVS-75 모드에 따른 디젤 酸化觸媒裝置의 排出가스 低減에 關한 實驗的 硏究)

  • 한영출;김종춘;오용석
    • Journal of Korean Society for Atmospheric Environment
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    • v.15 no.4
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    • pp.457-461
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    • 1999
  • Recently, increasing usage of diesel vehicle, many countries try to reduce the pollutant materials by emission regulation standard. Particularly, in our country, the supplement ratio of diesel vehicle is high, and air pollution by particulate matter(PM) is very serious. So, in theoretical study wer analyzed the formation principle of gaseous emission and PM, the characteristics of CVS-75 mode. In experimental study, we tested exhaust gas reduction of emission and PM, the characteristics of CVS-75 mode. In experimental study, we tested exhaust gas reduction of disel oxidation catalyst(DOC) by CVS-75 mode in light duty diesel vehicle. In case of an automobiletest with the 2,956cc diesel engine which DOC was equipped, CVS-75 mode which is similar to driving conditions on the road was chosen as the restrictive mode of light duty diesel automobile in our country. According to the Pt, the reduction rate of exhaust emission was estimated with using 0.1% high sulfur fuel and 0.05% low sulfur fuel.

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An Experimental Study on Determination of Capacity of Catalysts in 2 -Catalyst System (2-촉매 시스템에서의 촉매 용량 결정에 대한 실험적 연구)

  • Ko, Kwang-Ho
    • Journal of the Korean Society of Industry Convergence
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    • v.6 no.1
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    • pp.11-15
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    • 2003
  • There are various method for the LEV(Low Emission Vehicle) regulation, but 2-catalyst system using one catalyst near exhaust manifold and another catalyst underfloor, is the most popular. This system uses the proven catalyst technology and doesn't use energy. But it is difficult to determine capacity of the two catalysts. So an optimization method to determine the capacity has been proposed by other researcher. It uses the fact that emission decreases with capacity increasing, but the decreasing ratio slows down in high capacity range. It means that the emission and capacity of catalyst is exponentially decreasing relation. In this paper this method will be verified with various experiments. And this method was proven to be very useful to determine the capacity of two catalysts system.

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The Plan to Increase Efficiency of Exhaust Gas Recirculation System (배기가스 재순환장치 효율 증대 방안)

  • Kim, Kwang Soo;Chung, Soon Suk;Heo, Yun Bok
    • Journal of the Korea Safety Management & Science
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    • v.16 no.3
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    • pp.185-194
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    • 2014
  • Internal engine is the main power source of vehicle and is the main source of air pollution. To satisfy this getting rigorous emission regulation, it must be solved simultaneously the dilemma of reducing emission gas and increasing heat efficiency. Diesel engine is preferred compare with gasoline engine in aspect of energy consumption but it must be solved reducing the containing of NOx, CO and HC. In this study: 1. Looking for alternative of performance improvement of Exhaust Gas Recirculation(EGR) which is emission gas reduction system. 2. Reducing malfunction of controlling emission gas. 3. Made possible precision control.

Relationships between Characteristics of Emission Gases and Engine Load Condition of Diesel Locomotive Engine (디젤기관차의 출력과 배기가스 배출특성의 상관관계 연구)

  • Cho, Young-Min;Kwon, Soon-Bak;Park, Duck-Shin;Park, Eun-Young;Lim, In-Gwon
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.1558-1563
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    • 2007
  • The air pollution by the diesel locomotives has become serious environmental concern because the emission gases are exhausted without any further treatment. Recently, the public interest on the air pollutants emission reduction technology is increasing due to the establishment of 'Metropolitan Air Quality Preservative Law' and the regulation of local governments on the urban air quality. In this study, we measured the concentration of particulate matters and gaseous pollutants by using a scanning mobility particle sizer, a dust spectrometer, and a stack sampler upon various engine load condition. The results show that the amount of emitted air pollutants increased upon the increase of engine power. The development of new technology to reduce the air pollutants emission is urgently required.

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Measuring Methods and Their Improvement of Formaldehyde Emission from Wood-Based Panels (목질제품의 포름알데히드방출량 측정방법과 개선방안)

  • Park Byung-Dae;Park Jong Young
    • Journal of the Korea Furniture Society
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    • v.15 no.2
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    • pp.1-17
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    • 2004
  • This paper attempted to review measuring methods of formaldehyde emission from wood-based panel products. Methods included for the discussion were desiccator methods, extraction method, and various chamber methods. First, the procedures and testing conditions of 24-hour desiccator method was critically reviewed, and an improvement of this method was proposed to meet international standards. Two different small chamber methods ($20\ell$ and $1m^3$ chamber methods) were also compared in terms of their advantages and disadvantages. In addition, the regulation levels of formaldehyde emission of wood-based composite panels were compared for different countries. The selection of a reference method of measuring formaldehyde emission of wood panel products should consider the ease of conducting test and cost required. Results should be exchangeable for different methods.

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A study on the NOx emission characteristics with combustion air flow conditions in air-staged coal burner (공기다단 석탄버너에서 연소공기 유동조건에 따른 NOx 배출특성에 관한 연구)

  • Kim, Hyuk-Je;Song, Si-Hong;Kim, Sang-Hyeun;Lee, Ik-Hyung
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.379-384
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    • 2003
  • Coal-burning utilities are facing a major NOx control compliance challenge due to the heavy emission regulation. In response to this challenge, some applicative technologies to effectively reduce NOx are developed and applied in the pulverized coal power plants. One of these is low NOx burner(LNB) equipped with multi-staged air register. In this study, NOx emission rate and flame shapes are investigated with secondary and tertiary air flow conditions in air staged coal burner, and the optimal windows of flow conditions to minimize NOx emission rate are found out. The test conditions treated in this study are the flow rate, swirl direction and intensity and throat injection velocity of secondary and tertiary air.

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