http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김신,김재곤,이민호,황인하,이정민 한국수소및신에너지학회 2018 한국수소 및 신에너지학회논문집 Vol.29 No.6
The dependence on global fossil fuels has been gradually reducing all over the world. Some countries which recognized the important of environmental values were joining to carry out international GHG goals. Our country has also participated with high targets (37% reduction compared to BAU 2030 years). So we need to supply materials of lower GHG value such as a bio-diesel. Bio-alcohol is one of the similar bio-fuels that can be reducing GHG. A lot of countries had tried to commercialize through various R&D for bio-alcohol. In this study, we analyzed the fuel characteristics of bio-alcohol fuel produced by domestic technology. And we evaluated a possibility to use as vehicle fuel through mixing of bio-alcohol and gasoline. The mixed fuels were satisfied with 2.3 wt% of oxygen content that is standard of the petroleum and petroleum alternative fuel business Act. We tried to evaluate a emission characteristic of vehicle by mixed fuel. In accordance with the results we tried to find a correlation between fuel and emission.
Jo, Heuntae,Prajitno, Hermawan,Zeb, Hassan,Kim, Jaehoon Elsevier 2017 Energy conversion and management Vol.148 No.-
<P><B>Abstract</B></P> <P>Herein, a supercritical methanol (scMeOH) route for efficient upgrading of the low-boiling fraction of fast pyrolysis bio-oil containing a large amount of low-molecular-weight acids and water was investigated. The effects of various reaction parameters, including the temperature, concentration, and time, were explored. The yield of bio-oil and the energy efficiency of the scMeOH upgrading process were determined based on the amount of methanol that participated in the reaction during upgrading and fractionation of the upgraded heavy-fraction bio-oils (UHBOs) and upgraded light-fraction bio-oils (ULBOs). Upgrading at 400°C with 9.1wt% bio-oil for 30min generated a high bio-oil yield of 78.4wt% with a low total acid number (TAN) of 4.0mg-KOH/g-oil and a higher heating value of 29.9MJkg<SUP>−1</SUP>. The energy recovery (ER) was 94–131% and the energy efficiency (EE) was in the range of 79–109% depending on the calorific values of the ULBOs. Compared with upgrading in supercritical ethanol and supercritical isopropanol, less alcohol participation, a lower TAN, and higher ER and EE were achieved with scMeOH upgrading. Plausible pathways for bio-oil upgrading in supercritical alcohols based on detailed compositional analysis of the UHBO, ULBO, and gaseous products were discussed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Non-catalytic and non-hydrogen based bio-oil upgrading was conducted using scMeOH. </LI> <LI> 16–40wt% alcohols were consumed during the upgrading. </LI> <LI> High bio-oil yield of 78.4wt% and low TAN of 4.0mg KOH/g were achieved. </LI> <LI> Effect of supercritical alcohols, reaction times, temperature and bio-oil concentration was conducted. </LI> <LI> scMeOH upgrading has good energy recovery (ER) and energy efficiency (EE) compared with scEtOH and scIPA. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
저농도 바이오알코올 혼합에 따른 스파크 점화 엔진 청정 특성 연구
차규섭,노수영 한국수소및신에너지학회 2019 한국수소 및 신에너지학회논문집 Vol.30 No.5
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.
저농도 바이오알코올 혼합 연료가 스파크 점화 엔진 차량의 연비 및 배출가스에 미치는 영향
차규섭,노수영 한국수소및신에너지학회 2020 한국수소 및 신에너지학회논문집 Vol.31 No.2
This study was conducted to analyze the impact of low level bio-alcohols that can be applied without modification of vehicles to improve air quality in Korea. The emissions and fuel economy of low level bio-alcohols mixed gasoline fuels of spark ignition vehicles, which are direct injection and port fuel injection, were studied in this paper. As a result of the evaluation, the particle number (PN) was reduced in all evaluation fuels compared to the sub octane gasoline without oxygen, but the correlation with the PN due to the increase in the oxygen content was not clear. In the CVS-75 mode, emitted CO tended to decrease compared to sub octane gasoline, but no significant correlation was found between NMHC, NOx and fuel economy. In addition, it was found that the aldehyde increased in the oxygenated fuel, and there was no difference in terms of the amount of aldehyde generated among a series of bio-alcohol mixed fuels.
바이오알코올 혼합연료의 엔진오일 희석특성에 대한 실험적 연구
김현준(HyunJun Kim),이호길(HoKil Lee),오세두(SeDoo Oh),김신(Shin Kim) 한국트라이볼로지학회 2016 한국윤활학회지(윤활학회지) Vol.32 No.6
Engine oil plays an important role in the mechanical lubrication and cooling of a vehicle engine. Recently, engine development has focused on the adoption of gasoline direct injection (GDI) and turbocharging methodology to achieve high-power and high-speed performance. However, oil dilution is a problem for GDI engines. Oil dilution occurs owing to high-pressure fuel injection into the combustion chamber when the engine is cold. The chemical components of engine oil are currently developed to accommodate gasoline fuel; however, bio-alcohol mixtures have become a recent trend in fuel development. Bio-alcohol fuels are alternatives to fossil fuels that can reduce vehicle emissions levels and greenhouse gas pollution. Therefore, the chemical components of engine oil should be improved to accommodate bio-alcohol fuels. This study employs a 2.0 L turbo-gas direct injection (T-GDI) engine in an experiment that dilutes oil with fuel. The experiment utilizes a variety of fuels, including sub-octane gasoline fuel (E0) and a bio-alcohol fuel mixture (Ethanol E3~E7). The results show that the lowest amount of oil dilution occurs when using E3 fuel. Analyzing the diluted engine oil by measuring density and moisture with respect to kinematic viscosity shows that the lowest values of these parameters occur when testing E3 fuel. The reason is confirmed to influence the vapor pressure of the low concentration bio-alcohol-fuel mixture.
바이오부탄올, 바이오에탄올 혼합비율에 따른 연료적 특성 연구
김신,김재곤,박천규,하종한 한국수소및신에너지학회 2017 한국수소 및 신에너지학회논문집 Vol.28 No.6
Korea, which has a high dependency on energy imports, is greatly affected by fluctuations in international oil prices. In order to offset these effects, various policies such as ‘diversification of energy sources’ and ‘energy mix’ are being pursued. Renewable Fuel Standard (RFS) is a policy promoted for this purpose, and a compulsory mixing system is applied only to the diesel. In order to reduce dependence on fossil fuels in various countries, they are concentrating on the dissemination of bio-alcohol as well as bio-diesel, and commercialization through various verification. In this study, evaluation of domestic materials and vehicles was carried out to promote domestic bio alcohol fuel. We analyzed the fuel characteristics of domestic quality standard items by mixing them with gasoline of automobile at a certain mixing ratio (0%, 3%, 6%, and 10%).
( Moogi Surendar ),이인구 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Bio-alcohols such as Methanol, Ethanol and Glycerol are considered as excellent feedstocks for producing hydrogen-rich gas by steam reforming (SR) process due to their renewable production from biomass. Hydrogen is a renewable energy carrier that can be converted to electricity and heat in the solid oxide fuel cell (SOFC). An integrated steam reforming and SOFC technology is seems to be promising to produce electricity to meet energy demand locally. But, the main impediment to integrated SR and SOFC technology is deactivation of Ni catalyst due to coke formation. One of the ways, to increase nickel catalyst life time is preparing the catalysts in the form structural precursors mainly hydrotalcites. Ni-Cu-Fe (NCF) based hydrotalcites with steam reforming and water gas shift bifunctional properties is expected to be active for producing hydrogen rich gas from steam reforming of bio-alcohols.
Boonsiri Pidtasang,Adisak Pattiya,Parncheewa Udomsap,Sittha Sukkasi,Nuwong Chollacoop 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6
Fast pyrolysis of eucalyptus bark was carried out in a free-fall pyrolysis unit at different temperatures ranging from 400 to 550 8C to produce bio-oil, char and gas. The bio-oil produced at optimum temperature was mixed with alcohols with an aim to improve its properties. The results showed that the maximum bio-oil yield of 64.65 wt% on dry biomass basis could be obtained at the pyrolysis temperature of 500 8C. The addition of a small proportion (2.5–10%) of alcohol into the bio-oil could improve its viscosity, stability and heating value. These effects were further enhanced when increasing the alcohol.
김현준,이호길,김재곤,오영규,박성욱 한국수소및신에너지학회 2017 한국수소 및 신에너지학회논문집 Vol.28 No.6
An experimental study on engine performance and emission characteristics for bio-alcohol fuels considered as RFS fuel. The Bio-alcohol fuel were mixed ethanol and butanol and used in a 1.8 liter mpi engine. The efficiency of the BSFC is excellent in the maximum torque operation condition and the part load operation condition. As the bio-alcohol mixing ratio increased, the lambda <1 and ignition timing advanced 5°CA. As the mixing concentration increased, NOx emission increase and CO2 emission decreased.