Application of straight vegetable oil from triglyceride based biomass to IC engines - A review

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• 作者：Soo-Young No ^{sooyoung@chungbuk.ac.kr}
• 关键词：BSEC ; brake specific energy consumption ; BSFC ; brake specific fuel consumption ; BTDC ; before top dead center ; BTE ; brake thermal efficiency ; CFD ; computational fluid dynamics ; CFPP ; cold filter plugging point ; CN ; cetane number ; DI ; direct injection ; EGR ; exhaust gas recirculation ; GHG ; green house gas ; HDDI ; heavy duty direct injection ; IDI ; indirect injection ; LCA ; life cycle analysis ; LHR ; low heat rejection ; LHV ; lower heating value ; LPG ; liquefied petroleum gas ; PAH ; polycyclic aromatic hyd
• 刊名：Renewable and Sustainable Energy Reviews
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：69
• 期：Complete
• 页码：80-97
• 全文大小：813 K
• 卷排序：69

文摘

This review will be concentrated on the application of straight vegetable oils (SVO) produced from the triglycerides based biomass to internal combustion (IC) engines such as compression ignition (CI) engine and gas turbines.The researches on the application of SVO to CI engines were categorized to neat SVO, fuel modification, engine modification, and simultaneous modification of fuel and engine. The discussion for fuel modification was limited only to physical fuel modification such as blending, SVO emulsion and SVO with additives. Most studies for binary blends were concentrated on blending SVO with petrodiesel. However, blending SVO with ethanol, methanol or other alcohols was also examined. The ternary blends including SVO blended fuel with butanol or kerosene in diesel were also studied. The optimum concentrations of SVO when blended with petrodiesel suggested by the different investigators for the different SVOs are summarized. Most inedible vegetable oil when blended with diesel up to a concentration of 20% is a promising alternative to petrodiesel and would not require any engine modification. Most studies reported lower BTE and higher BSFC for blended SVO with diesel than for petrodiesel. Increase of CO and HC and decrease of NOx were noticed for blended SVO compared with petrodiesel. However, the effect of the blended SVO on the PM emission or smoke opacity was different from one study to another.Engine modification includes preheating the fuel line or fuel itself, dual fuelling, and newly designed engine as well as injection system modification kit. Most studies for engine modification were concentrated on the preheated SVO. The optimum preheating temperatures for several SVO suggested by different investigators are summarized. The optimum preheating temperature is virtually related to the viscosity of SVO itself and has to be established for the different type of SVO. The preheating method of SVO includes engine coolant, heat exchanger, electric heater, phase change material storage system. Most studies showed the increase of CO, HC and PM and decrease of NOx compared with petrodiesel. However, opposite results for NOx and PM can be found in some studies.The most practical and effective method for lowering the viscosity of SVO can be the simultaneous modification of fuel and engine, i.e. by preheating and/or blending SVO with a diesel fuel or other fuel in suitable proportions.