Alcohol and ether as alternative fuels in spark ignition engine: A review

Awad, Omar I. and R., Mamat and Ali, Obed Majeed and N. A. C., Sidik and Talal, Yusaf and K., Kadirgama and Kettner, Maurice (2018) Alcohol and ether as alternative fuels in spark ignition engine: A review. Renewable and Sustainable Energy Reviews, 82. pp. 2586-2605. ISSN 1364-0321. (Published)

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Energy security and global warming concern are the two main driving forces for the global alcohol development that also have the effort to animate the agro-industry. Generally, alcohol and ether fuels are produced from several sources and can be produced locally. Almost all alcohol fuels have similar combustion and ignition characteristics to existing known mineral fuels. Mainly the ether fuels (MTBE and DME) are used as additives at low blending ratio to enhance the octane number and oxygen content of gasoline. The addition of alcohol and ether fuels to gasoline lead to a complete combustion due to the higher oxygen content, thereby leads to increased combustion efficiency and decreased engine emissions. The objectives of this paper are to systematically review the use of alcohols and ethers including butanol, methanol, ethanol, and fusel oil, MTBE, and DME as fuels in SI engine. Also, the current study has investigated the effects of performance (brake torque, brake power, BSFC, effective efficiency, and EGT), emissions (CO, CO2, NOx and HC) and combustion characteristics of SI engine with alcohol and ether. The increase in engine performance could be attained with an increased compression ratio along with the use of alcohol fuels which have a higher-octane value. Furthermore, alcohol and ether burn very cleanly than regular gasoline and produce lesser carbon monoxide (CO) and nitrogen oxide (NOx). On the other hand, the energy value of alcohol and ether fuels is approximately 30% lower than gasoline; thereby the specific fuel consumption (SFC) will increase simultaneously when using alcohol and ether as a fuel. Finally, this paper also discusses the impacts of alcohol on engine vibration, engine noise, and potential to be used as a gasoline octane enhancer. Alcohol can be used as a pure fuel in spark ignition engine, but it requires some modifications to the engine.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Alcohols fuel; Ether; Spark ignition engine; Engine emissions; Combustion characteristics
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Centre of Excellence: Automotive Engineering Centre
Centre of Excellence: Automotive Engineering Centre
Depositing User: Pn. Hazlinda Abd Rahman
Date Deposited: 07 Aug 2018 02:48
Last Modified: 07 Aug 2018 02:48
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