期刊
ALEXANDRIA ENGINEERING JOURNAL
卷 61, 期 1, 页码 541-547出版社
ELSEVIER
DOI: 10.1016/j.aej.2021.06.043
关键词
Palm oil; Biodiesel; Micro-explosion; Puffing; Secondary atomization; Alternative fuels
资金
- Ministry of Higher Education of Malaysia under the Fundamental Research Grant Scheme [FRGS/1/2017/TK07/UTP/02/4]
- Murata Science Foundation [015ME0-187]
The study found that all samples of the emulsified fuels produced micro-explosions in four distinct stages. Larger water particles size and higher hydrophilic-lipophilic balance values are the main factors that caused shorter time leading to micro-explosion of droplets.
Palm oil methyl ester is blended with diesel oil as a commercial diesel product in Malaysia, known as biodiesel B10. Biodiesel mixed with water proved to reduced simultaneously both the particulate matter and NOx during combustion. Emulsified biodiesel also caused a secondary atomization due to micro-explosion of the fuel droplets, which is beneficial in improving combustion efficiency. The main factors and events leading to micro-explosion for palm oil derived biodiesel emulsified fuel has yet to be made available in the open literature. Hence, this study aimed to visualize the droplet evolution to micro-explosion of single droplet when heated. A single droplet was placed on the hot surface of a hotplate maintained at 500 degrees C and the droplet evolution time leading to micro-explosion were capture using a high-speed camera. The study found that all samples of the emulsified fuels produced micro-explosions in four distinct stages. The droplet underwent from a homogenous emulsion, turning from milky color to being transparent during the separation stage, volume expansion during the bubble growth stage, intense coalescence and puffing stage and finally micro-explosion stage. Larger water particles size and higher hydrophilic-lipophilic balance values are the main factors that caused shorter time leading to micro-explosion of droplets. (C) 2021 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University.
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