• 한국연소학회지
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• 제20권1호
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• pp.15-23
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• 2015

This paper presents the results of field demonstration for fuel switching to bio-fuel oil in 4 commercial heavy oil fired power plants. The 100% fuel switching field demonstration was successfully carried out in two tangential-firing boilers at a capacity of 75 and 100 MWe respectively without major equipment retrofit, and also 25% bio-fuel oil blending for two opposite firing boilers at a capacity of 350 and 400 MWe respectively. Despite the low density and heating value, the bio fuel was successfully replaced heavy fuel oil at the full load by only adjusting operational parameters. Incase of bio fuel oil combustion, heat absorption of radiative heat transfer section was reduced while convection section has opposite trend. In pollutants emission, a major reductionin SOx as well as 10-20% reduction in NOx were achieved by the fuels witching. On the other hand, boiler efficiency was slightly underestimated.

• Journal of Advanced Marine Engineering and Technology
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• 제37권1호
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• pp.53-58
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• 2013

비에스테르화 대두유의 활용 가능성을 평가하기 위해 현재 대부분의 디젤 자동차에 채택되어 있는 전자 제어 분사식 과급디젤기관에 경유, 에스테르화 바이오 디젤유 5% 및 비에스테르화 대두유 5% 혼합유를 사용하여 성능 실험을 실시하였다. 그 결과, 에스테르화 바이오 디젤유 5%와 비에스테르화 대두유 5%의 연소성능이 대부분 비슷하지만 NOx는 비에스테르화한 것이 더 적게 배출되었고 이는 Fuel NO에 의한 것을 밝혔다.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.359-368
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• 1996

The performance and exhaust emissions of a diesel engine using light oil, heated, rice-bran oil , heated rice-bran oil treated with ultrasonic wave, used frying oil, use frying oil treated with ultrasonic wave, used frying oil, used frying oil treated with ultrasonic wave, methyl esters of rice-bran oil and used frying oil have been compared. All the fuels performed satisfactorily in a precombustion chamber-type diesel engine without injection pump recalibration or any engine modification at the range of engine speed from 1600 to 2800 rpm at its full load during a sort period , with the rice-bran oil and rice-bran oil treated with ultrasonic wave requiring somewhat preheating when ambient temperature was below 15$^{\circ}C$. General performance and emission characteristics of light oil and bio-oils were comparable , with the bio-oil based fuels giving very low SO$_2$ and lower smoke readings.

• Korean Chemical Engineering Research
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• 제45권4호
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• pp.340-344
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• 2007

MCM-41 촉매를 이용하여 일본 낙엽송의 열분해 바이오 오일의 촉매 개질 반응을 수행하였다. MCM-41 촉매는 바이오 오일의 불안정성의 원인중 하나인 산소를 $H_2O$, CO, $CO_2$의 형태로 제거하여 개질 전의 오일보다 더 안정한 오일을 생성하였다. MCM-41 촉매는 무촉매 반응에 비해 경제적 가치가 높은 페놀류 화합물의 생성량을 증가시켰다. 특히 Si-MCM-41 촉매에 비해 산점의 양이 많은 Al-MCM-41의 경우 촉매 활성이 더 우수하였다. 또한 촉매와 일본 낙엽송을 직접 혼합한 것보다, 바이오 오일이 촉매층을 통과했을 때 더 나은 개질 결과를 얻을 수 있었다.

• 한국응용과학기술학회지
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• 제32권3호
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• pp.588-598
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• 2015

최근 정부는 신재생에너지 연료 혼합 의무화 제도(RFS)와 신재생에너지 공급 의무화제도(RPS)를 적극 추진하고 있어 신재생에너지 연료의 중요성은 그 어느 때보다도 부각되고 있으며 적극적인 연구가 필요한 때이다. 이의 일환으로 발전용 바이오중유 시범보급사업과 관련 연구가 활발히 진행 중에 있다. 본 연구에서는 바이오중유의 성능평가기준(안) 마련을 위해 중유와 바이오중유의 연료품질 특성 및 산업용 보일러에서 연소 후 배출되는 먼지, 배출가스의 양을 비교 연구하였다. 연구결과 바이오 중유를 사용할 경우 먼지와 황산화물 등 유해배출가스가 현저히 저감 되는 것이 밝혀졌다.

• Tribology and Lubricants
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• 제32권6호
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• pp.183-188
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• 2016

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.

• 한국식생활문화학회지
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• 제19권1호
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• pp.61-69
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• 2004

The shelf-life of Yugwa(Busuge) is very short because of the low oxidative stability of soybean oil which is conventionally used as the frying oil of Yugwa base with high porous structures. To identify the possibility of replacing soybean oil with palm oil whose oxidative stability is high, POV(peroxide value), AV(acid value), colorness (L. a and b), hardness and sensory characteristics during storage of the Yugwa base fried with the soybean oil and palm oil stored in the anaerobic packaging or the aerobic packaging at 10 and $30^{\circ}C$ for 75 days were measured. POV and AV of the Yugwa base fried with palm oil were significantly lower than those of Yugwa fried with the soybean oil. Hardness and colorness were not different each other and, sensory evaluation was slightly higher than that fried with soybean oil. Lipid absorption amount was not significantly different between the Yugwa base fried with palm oil and the one fried with soybean oil.

• 자원리싸이클링
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• 제15권1호
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• pp.12-19
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• 2006

볏짚은 국내에서 유용한 재생 가능한 바이오매스이다. 유동층과 char 분리 장치가 구비된 급속 열분해 장치를 이용하여 볏짚으로부터 바이오오일의 생산에 대한 실험을 수행하였다. 본 연구는 온도변화에 따른 볏짚의 열분해 생성물의 분포와 생성물의 화학적 구성을 알아보고 바이오오일의 활용 가능성을 고찰하고자 했다. 급속 열분해 반응은 $466^{\circ}C,\;504^{\circ}C,\;579^{\circ}C$에서 각각 수행되었다. 유동화 매체로는 생성가스를 사용하였으며 유량은 약 30NL/min 였다. 볏짚의 열분해 결과 기체, 액체, 고체 물질을 얻을 수 있었으며, 기체물질은 GC(TCD, FID)를 이용하여 정성적, 정량적 분석을 하였다. 액체물질은 상등액과 tar가 풍부한 하등액으로 분리하여 발열량, 원소분석, 수분, GC/MS를 통해 화학구성성분을 분석하였다. 고체물질인 char는 원소분석을 하고 그 발열량을 측정하였다. 액체물질인 바이오오일은 화학특성 분석결과 대체 연료유뿐만 아니라 화학 원료물질로서의 사용가능성을 볼 수 있었다.

• 한국수소및신에너지학회논문집
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• 제28권6호
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• pp.712-720
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• 2017

As Korean government has activated the renewable portfolio standard (RPS) since 2012, producers have been seeking and using the various renewable resources to meet the RPS quota. One of these efforts, Power Bio-Fuel oil demonstration project is being conducted to check the operability and compatibility with fossil fuel, Fuel oil (B-C) from 2014. The oil is a mixture of vegetable oil and animal fat or fatty acid ester of them and should satisfy some specification to use the power generation. The oil's quality and combustion characteristics are different from conventional oil, Fuel oil (B-C) in current power plant facility. In this study, it was investigated the storage stability and malodor intensity of Bio-Fuel oil.

• 청정기술
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• 제26권1호
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• pp.79-87
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• 2020

The bio-oil produced from the fast pyrolysis of lignocellulosic biomass contains a high amount of oxygenates, causing variation in the properties of bio-oil, such as instability, high acidity, and low heating value, reducing the quality of the bio-oil. Consequently, an upgrading process should be recommended ensuring that these bio-oils are widely used as fuel sources. Catalytic fast pyrolysis has attracted a great deal of attention as a promising method for producing upgraded bio-oil from biomass feedstock. In this study, the fast pyrolysis of tulip tree was performed in a bubbling fluidized-bed reactor under different reaction temperatures, with and without catalysts, to investigate the effects of pyrolysis temperature and catalysts on product yield and bio-oil quality. The system used silica sand, ferric oxides (Fe₂O₃ and Fe₃O₄), and H-ZSM-5 as the fluidized-bed material and nitrogen as the fluidizing medium. The liquid yield reached the highest value of 49.96 wt% at 450 ℃, using Fe₂O₃ catalyst, compared to 48.45 wt% for H-ZSM-5, 47.57 wt% for Fe₃O₄ and 49.03 wt% with sand. Catalysts rejected oxygen mostly as water and produced a lower amount of CO and CO₂, but a higher amount of H₂ and hydrocarbon gases. The catalytic fast pyrolysis showed a high ratio of H₂/CO than sand as a bed material.