• Title/Summary/Keyword: Emission Regulation

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The Emission Characteristics of Bio-Diesel Fuel in Heavy-Duty Engine (바이오 디젤 적용에 따른 대형엔진의 배출가스 특성)

  • Kim, Sun-Moon;Eom, Myoung-Do;Hong, Ji-Hyung
    • Journal of Korean Society for Atmospheric Environment
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    • v.26 no.5
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    • pp.499-506
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    • 2010
  • Recently, a great deal of attention have been directed to the use of alternative fuels as a means to reduce vehicular emissions. As one of the promising alternative fuels, bio-diesel has advantages of a wide adaptability without retrofit of diesel engine. It is also effective enough to reduce CO, THC, $SO_x$, polycyclic aromatic hydrocarbons (PAHs) and PM. In this study, we investigated the emission characteristics of biofuels between different operating conditions, i.e., engine speed (1,400 rpm and 2,300 rpm), engine load (10% and 100%), bio-diesel blending (BD0, BD5 and BD20), and recirculation (EGR) rate of exhaust gas (0% and 20%). Relative performance of the system was evaluated mainly for the greenhouse gases ($CH_4$, $N_2O$ and $CO_2$). In addition, emission characteristics of ND-13 mode were also tested against both greenhouse gases and other airborne pollutants under emission regulation. The relative composition of bio-diesel has shown fairly clear effects on the emission quantities of CO, THC, and PM emission, although it was not on $NO_x$ and greenhouse gases. EGR rate has shown trade-off characteristics between $NO_x$ and PM.

Investigation into Methods for reducing Greenhouse Gas Emission in Paper Industry with Development of Greenhouse Gas Inventory (온실가스 인벤토리 구축을 통한 제지산업에서 온실가스 절감 방법론 조사)

  • Kim, Dong-Seop;Sung, Yong-Joo;Lee, Joon-Woo;Kim, Se-Bin;Park, Gwan-Soo
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.44 no.2
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    • pp.49-57
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    • 2012
  • The reduction of greenhouse gas emission currently becomes more urgent task for Korean Industries, especially for the paper industries because of the new regulation based on the low carbon-green growth law. In order to reduce effectively the greenhouse gas emission, the development of greenhouse gas emission inventory has been widely considered as one of the basic processes and has been applied to many industries. In this study, the fundamental schemes and the cases of greenhouse gas inventories were investigated. Especially, the major considering units for paper industries were suggested to develope greenhouse emission inventory of paper industry.

Action Plans of Paper Industry Correspond to the Carbon Dioxide Emission Trading Market (제지산업의 탄소배출권 시장 대처방안)

  • Sung, Yong-Joo;Kim, Dong-Seop;Um, Gi-Jeung;Lee, Joon-Woo;Kim, Se-Bin;Park, Gwan-Soo
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.44 no.1
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    • pp.43-51
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    • 2012
  • Carbon dioxide emission trading market would play very important role in the global effort to cope with climate change. In KOREA, the energy consumption and geen house gas emission of various industry would be controlled by the low carbon-green growth law which was established at 2009. The paper industry as one of major industries in terms of energy consumption has been greatly required to prepare action plan for addressing this regulation and reduction of carbon dioxide emission. In this study, the current states of carbon dioxide emission trading market were analyzed in terms of practical responses of the paper industry. And the various action plans including CDM projects for paper industry were suggested.

Speed-dependent Emission Characteristics of the Hazardous Air Pollutants from Diesel Medium-duty Trucks according to Emission Standards (배출허용기준 강화에 따른 차속별 경유 중형트럭의 유해대기오염물질 배출특성)

  • Hong, Heekyoung;Jung, Sungwoon;Son, Jihwan;Moon, Taeyoung;Lee, Sangeun;Moon, Sunhee;Yoon, Hyunjin;Kim, Jeongsoo;Kim, Jounghwa
    • Journal of ILASS-Korea
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    • v.20 no.2
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    • pp.121-129
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    • 2015
  • This study was designed to investigate the emission characteristics of unregulated pollutants (Aldehyde, VOCs, PAHs) as well as regulated pollutants (CO, HC, NOx and PM) from diesel medium-duty trucks. The emission characteristics of unregulated and regulated pollutants were assessed based on regulation standards (EURO 4 and EURO 5) and intake weight (2.5 ton and 5 ton). The results show that unregulated and regulated pollutants remained almost unchanged at higher speeds but decreased at below 23.5 km/h. Reduction in unregulated and regulated pollutants was noticeable in vehicles of recent regulation standards and light intake weight. The analysis of aldehyde using UPLC showed that formaldehyde and acetaldehyde of aldehyde were most dominant. The GC/MS analysis showed that benzene, toluene, ethylbenzene and xylene of VOCs was over 80% followed by toluene, xylene, ethylbenzene and benzene. In addition, the analysis of PAHs using GC/TOF-MS indicated that bi- and tricyclic aromatic ring of aromatic compounds was 73% and 53% at 2.5 ton and 5 ton vehicles, respectively. The results of this study will be contributed to establish HAPs inventory.

A Convergence Study on Improvement of Emission Regulation in Military Vehicle (군용차량 배출가스 규제 개선에 관한 융합적 고찰)

  • Yoon, Heung-Soo
    • Journal of the Korea Convergence Society
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    • v.11 no.1
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    • pp.181-186
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    • 2020
  • Civil technologies and parts occupy big ratio in military vehicle as military supply goods were commercialized. In case of the military vehicle engine, the civil purposed engine has been militarized without developing engine for defense industry. Because of this, it happens that Euro-5 version is mounted in spite of Euro-6 at present because the civil laws on the civil purpose engine and required operational capability for militarization are applied by overlapping. Therefore, this study focused on current situation and issues on the military vehicle emission regulation and suggested how to improve through analyzing the theses, articles, Korean laws and systems. For improving methods, imposing the emission certification duty and exempting the certification for the vehicle of high strategical importance were suggested through aligning the related laws. Consequently, it is expected that this study will be used for basics of checking the civil laws and connection with military systems for commercialization of military supplied goods.

Estimation of Real-Driving NOx Emission Characteristics from Light-Duty Diesel Vehicles with PEMS (PEMS를 이용한 소형 경유차의 실주행 NOx 배출특성 평가)

  • Park, Yeon Jae;Kwon, Sang Il;Park, Jun Hong;Lee, Jai Young
    • Journal of Korean Society for Atmospheric Environment
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    • v.31 no.6
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    • pp.562-572
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    • 2015
  • $NO_x$ emissions from diesel vehicles have been regarded as a main cause of high $NO_2$ concentration in metropolitan area. Recent studies have shown that the on-road $NO_x$ emissions of diesel vehicles are quite higher than the emission limits specified with the pre-defined test method for emission certification. To reduce air pollutants effectively, the discrepancy of emissions in certification and real-driving conditions should be tackled. In this study, the real-driving emissions have been estimated with portable emission measurement system (PEMS). The results of this study have shown that the on-road $NO_x$ emissions from diesel vehicles have been decreased as the introduction of stricter emission regulation, EURO-6, but additional reduction should be still required and robust technologies should be applied to control $NO_x$ in real-driving conditions. RDE-LDV (Real Driving Emission - Light Duty Vehicles) test method being developed in the European Union can represent excessive on-road $NO_x$ emissions of diesel vehicles as applied emission technologies and can be a solution to remove discrepant $NO_x$ emissions between certification and Korean real-driving conditions. Among the $NO_x$ reduction technologies for EURO-6 diesel vehicles, selective catalytic reduction (SCR) system has shown the better performance than lean $NO_x$ trap (LNT) system to control on-road $NO_x$ emissions. Implementing RDE-LDV will require vehicle manufacturers to adopt the more effective $NO_x$ reduction technology in real driving conditions.

An experimental study on characteristics of exhaust emissions with fuel properties changes in a diesel engine for small-sized fishing vessel (소형 어선용 디젤기관에서의 연료유 성상에 따른 배기배출물 특성에 관한 연구)

  • Suh, Jung-Ju;Wang, Woo-Kyung;Kim, Sang-Am
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.46 no.4
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    • pp.487-494
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    • 2010
  • In order to test the applicability of bunker-A in a diesel engine for small-fishing boat, the investigation of the engine performance and the exhaust emission was performed under various conditions of fuel property, intake air pressure and fuel temperature. It was also performed based on IMO NOx Technical code. At high load, the energy consumption rate of bunker-A was lower than that of diesel oil, and the characteristics of exhaust emission of bunker-A were similar to those, and NOx emission rates of both fuels satisfied the IMO NOx emission regulation limits. The energy consumption rate and characteristics of exhaust emission were improved as the intake air pressure was increased, but these were not improved remarkably as the temperature of bunker-A was heated. However, at low load the energy consumption rate, CO emission rate and HC emission rate of bunker-A were higher than those of diesel oil, but NOx emission rates of the fuels were about the same. In addition, at low load the energy consumption rate and CO emission rate of bunker-A were increased as the intake air pressure and the temperature were higher than normal conditions. Accordingly, it is thought that the use of bunker-A in a kind of test engine is possible at high load. On the other hand, it is thought that more research is needed to improve the combustion efficiency under low temperature and low load condition.

Analysis of Emission Gas Characteristics for Gasoline Vehicles using the Inspection Results of Car Emission (운행차 배출가스 정밀검사 결과를 이용한 가솔린 차량에 대한 배출가스 특성 분석)

  • Roh, Hyun Gu
    • Journal of ILASS-Korea
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    • v.23 no.3
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    • pp.128-135
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    • 2018
  • In this study, the following conclusions could be obtained from the analysis of emissions contribution rates and features for contaminated emissions by 13,456 gasoline vehicles passed in the vehicle load test (ASM-idle) under the inspection year 2013 to 2017. It was confirmed that the contamination of the CO, HC, NOx by the displacement is reduced on over 3L engine. As a result of comparing the exhaust gas in the low speed idle mode and the AS2525 mode, the exhaust gas in the low speed idle mode was measured high. It is estimated that if ISG function is applied, emissions from idle condition will be reduced. NOx emissions were reduced when the engine power was above 200HP. It has been confirmed that the amount of exhaust emissions are significantly reduced for vehicles manufactured after 2004. As a result of analyzing the exhaust gas according to the season, it is judged that there is a correlation between HC and NOx according to the ambient temperature. The concentration of exhaust emission in vehicles with high accumulated distance increases, which is considered to be the result of aging of the vehicle.

A Study on the Conversion Performance of Lean NOx Trap for a 4-stroke Diesel Engine (4기통 디젤엔진에서의 Lean NOx Trap 촉매 정화 특성에 관한 연구)

  • Han, Joon-Sup;Oh, Jung-Mo;Lee, Ki-Hyung;Lee, Jin-Ha
    • Transactions of the Korean Society of Automotive Engineers
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    • v.19 no.2
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    • pp.78-83
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    • 2011
  • Diesel engine has many advantages such as high thermal efficiency, low fuel consumption and low emission of CO2. However, the diesel engine faced with strengthened emission regulation about NOx and PM. To suppress NOx emission, after-treatment systems such as Lean NOx Trap (LNT), Selective Catalytic Reduction (SCR) are considered as a more practical strategy. This paper investigated the performance of Lean NOx trap of the 4 stroke diesel engine which had a LNT catalyst. Characteristic of exhaust emission at NEDC mode was analyzed. From this result, the effect of nozzle attaching degree, injection quantity and gas flow change on NOx conversion performance was clarified.

Effect of Fuels on $CO_2$ Emission in CVS-75 Mode (CVS-75모드에서 사용연료에 따른 자동차의 이산화탄소 배출특성)

  • Kim, Yong-Tae;Lee, Ho-Kil;Kang, Jung-Ho;Chung, Jae-Woo;Chung, Yon-Jong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.17 no.4
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    • pp.72-78
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    • 2009
  • The regulation for $CO_2$ emissions from vehicles have become much more stringent in recent years. These more stringent regulations request vehicle manufacturers to develop alternative fuels to reduce exhaust emissions. In this paper, $CO_2$ emission of gasoline, diesel and LPG vehicles in the CVS-75mode is analyzed. The experimental results indicated that the cold starting acceleration period of $CO_2$ emission was much longer compared to the hot start acceleration period. For example, gasoline vehicle and LPG fuel vehicle had 21% higher $CO_2$ emission and diesel vehicle had 34% higher $CO_2$ emission.