Study of the oxidation stability and exhaust emission analysis of Moringa olifera biodiesel in a multi-cylinder diesel engine with aromatic amine antioxidants |
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| Affiliation: | 1. Centre for Energy Sciences, Department of Mechanical Engineering, Faculty of Engineering, 50603 Kuala Lumpur University of Malaya, Malaysia;2. Mechanical Engineering Department, Collage of Engineering, King Saud University, 11421 Riyadh, Saudi Arabia;3. Dept. of Mechanical Engineering, Dhaka University of Engineering and Technology, Gazipur, 1700, Bangladesh;1. Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Zhongguancun, Haidian, Beijing, 100190, China;2. China Electric Power Research Institute, Nanjing, 210003, Jiangsu, China;3. University of Chinese Academy of Sciences, Beijing, 100049, China;1. School of Mechanical and Energy Engineering, Tongji University, China;2. Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Taiwan;3. Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, China Academy of Sciences, China;1. Huadian Electric Power Research Institute, Hangzhou, Zhejiang 310030, China;2. Department of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China;3. Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an 710049, China;1. South China University of Technology, Wushan Road 381#, Tianhe District, Guangzhou 510640, China;2. Jiangsu University, Jiangsu, Xuefu Road 301#, Jingkou District, Zhenjiang 212013, China;1. Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore;2. Water Desalination & Reuse (WDR) Center King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia |
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| Abstract: | In this study, the two most effective aromatic amine antioxidants N,N′-diphenyl-1,4-phenylenediamine (DPPD) and N-phenyl-1,4-phenylenediamine (NPPD), were used at a concentration of 2000 ppm. The impact of antioxidants on the oxidation stability, exhaust emission and engine performance of a multi-cylinder diesel engine fuelled with MB20 (20% Moringa oil methyl ester and 80% diesel fuel blend) were analysed at varying speed conditions at an interval of 500 rpm and a constant load. It was observed that, blending with diesel enhanced the oxidation stability of the moringa biodiesel by approximately 6.97 h, and the addition of DPPD and NPPD to MB20 increased the oxidation stability up to 34.5 and 18.4 h, respectively. The results also showed that the DPPD- and NPPD-treated blends reduced the NOx emission by 7.4% and 3.04%, respectively, compared to the untreated blend. However, they do have higher carbon monoxide (CO) and hydrocarbon (HC) levels and smoke opacities, but it should be noted that these emissions are still well below the diesel fuel emission level. The results show that the addition of antioxidant with MB20 also improves the engine's performance characteristics. Based on this study, MB20 blends with amine antioxidants can be used in diesel engines without any modification. |
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| Keywords: | Moringa oleifera Biodiesel production Aromatic antioxidants Oxidation stability Performance Emissions |
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