Performance of a Diesel Engine Run with Kerosene–Rapeseed Oil Blends Doped with Ignition Promoters

IF 1 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY SAE International Journal of Fuels and Lubricants Pub Date : 2023-07-31 DOI:10.4271/04-17-02-0008
A. Cherepanova, D. Ukhanov, Evgeniy Savel’ev, V. Sapunov
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Abstract

The use of straight vegetable oil in diesel engines leads to undesirable consequences due to the peculiar physicochemical properties of vegetable oils. In this regard, the use of pure and unmodified vegetable oils requires their obligatory dilution with petroleum fuels, usually diesel fuel. However, blends of diesel fuel with vegetable oil have a significantly higher density and viscosity than pure diesel fuels. Therefore, in this article, it was proposed to use blends of vegetable oil with aviation kerosene since kerosene has lower density and viscosity compared to diesel fuel. In addition, kerosene is less prone to coking of injectors, has a higher calorific value, and has a lighter hydrocarbon composition, which makes starting the engine easier. Within the framework of the study, engine tests of a full-size four-cylinder diesel engine, MMZ D-245.12.C, were carried out at maximum load in the range of crankshaft speeds from minimum (1000 min−1) to nominal (2400 min−1). Various blends of kerosene with rapeseed oil with an oil content of 10 to 50% by volume have been tested. Ignition promoters were introduced into the fuel blends to improve their combustion. Commercial ethylhexyl nitrate was used as an ignition promoter. In addition, experimental additives were investigated, which are the FAMEs of vegetable oils oxidized to various concentrations of peroxide compounds. It has been shown that blends of kerosene and rapeseed oil doped with ignition promoters can be successfully used in diesel engines. The engine showed the maximum power and the lowest level of smoke emissions when running on a blend of kerosene and rapeseed oil with the addition of oxidized FAME of olive oil with a peroxide content of 1.1 g OOH/100 g.
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掺有点火助燃剂的煤油-菜籽油混合燃料柴油机性能研究
由于植物油特有的物理化学性质,在柴油机中使用直接植物油会导致不良后果。在这方面,使用纯和未改性的植物油需要用石油燃料(通常是柴油)进行必要的稀释。然而,柴油与植物油的混合物比纯柴油具有更高的密度和粘度。因此,由于煤油的密度和粘度比柴油低,因此本文建议使用植物油与航空煤油的混合物。此外,煤油不易使喷油器结焦,热值较高,碳氢化合物成分较轻,使发动机起动更容易。在研究框架内,对全尺寸四缸柴油发动机MMZ D-245.12.C进行了发动机测试,在曲轴转速从最小(1000 min - 1)到标称(2400 min - 1)的最大负载范围内进行了测试。煤油与菜籽油的各种混合物,含油量为10%至50%的体积已经进行了测试。在混合燃料中引入助燃剂以改善其燃烧。用硝酸乙基己基作为助燃剂。此外,还对实验添加剂进行了研究,这些添加剂是植物油被氧化成不同浓度的过氧化物的产物。研究表明,煤油与菜籽油掺加助燃剂的混合物可以成功地用于柴油机。当使用煤油和菜籽油的混合物,并添加过氧化含量为1.1 g OOH/100 g的氧化橄榄油时,发动机显示出最大功率和最低的烟雾排放水平。
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来源期刊
SAE International Journal of Fuels and Lubricants
SAE International Journal of Fuels and Lubricants TRANSPORTATION SCIENCE & TECHNOLOGY-
CiteScore
2.20
自引率
10.00%
发文量
16
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