Engine performance and combustion characteristics of a direct injection compression ignition engine fueled waste cooking
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Engine performance and combustion characteristics of a direct injection compression ignition engine fueled waste cooking oil synthetic diesel Thanh Viet Nguyen1 • Khanh Duc Nguyen1 • Nang Xuan Ho2 • Vinh Duy Nguyen2
Received: 18 May 2019 / Revised: 22 April 2020 / Accepted: 11 May 2020 The Author(s) 2020
Abstract Biodiesels produced from various feedstocks have been considered as alternative fuels used in internal combustion engines without major modifications. This research focuses on producing biodiesel from waste cooking oil (WCOSD) by the catalytic cracking method using MgO as the catalyst and comparing the engine operating characteristics of the test engine when using WCOSD and traditional diesel (CD) as test fuels. As a result, the brake power of the test engine fueled WCOSD, and traditional diesel is similar. However, the engine fuel consumption in the case of using WCOSD is slight increases in some operating conditions. Also, the nitrogen oxides emissions of the test engine fueled WCOSD are higher than those of CD at all tested conditions. The trend is opposite for hydrocarbon emission as the HC emission of the engine fueled by WCOSD reduces 26.3% on average. The smoke emission of the test engine in case of using WCOSD is lower 17% on average than that of CD. However, the carbon monoxide emissions are lower at the low and medium loads and higher at the full loads. These results show that the new biodiesel has the same characteristics as those of commercial biodiesel and can be used as fuel for diesel engines. Keywords Feedstock Waste cooking oil Engine characteristics Exhaust missions Ignition timing Fuel consumption
1 Introduction Diesel engines are used in transportation, power plants, construction, and rural agricultural and industrial activities; consequently, it has led to increasing in demand for petroleum-based diesel (Boggavarapu and Ravikrishna 2013), while fossil fuel reserves in the world are limited. Also, the problems of air pollution and global warming have been becoming even more critical than ever. Scientists worldwide have been working diligently to find out renewable, carbon–neutral, and environmentally friendly fuels to
& Vinh Duy Nguyen [email protected] 1
Department of Internal Combustion Engine, School of Transportation Engineering, Hanoi University of Science and Technology, Hanoi, Viet Nam
2
Faculty of Vehicle and Energy Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi, Viet Nam
replace the petroleum-based diesel. As shown in previous reports (Rajasekar et al. 2010; Altin et al. 2001; Fukuda et al. 2001; Sayin and Canakci 2009; Han et al. 2010; Kannan et al. 2011; Macor et al. 2011), biodiesel fuel, oxygenated, biodegradable, non-toxic, and environmentally friendly fuel, has been considered as a very promising alternative fuel to replace traditional diesel fuel. Biodiesel produced from various resources such as rapeseed, soybean, cottonseed oil, palm oil, jojoba oil, sunflower has been used in internal combustion engines withou
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