An Experimental Investigation on Diesel and Low Heat Rejection Engines with Dual Biodiesel Blends

Effects of Neem Oil-Derived Biodiesel Addition to Diesel on the Reactivity and Characteristics of Combustion-Generated Soot

“…Because neem oil has a good amount of such FAs in the form of oleic acid, it is expected that the quality of biodiesel or fatty acid methyl esters (FAME) obtainable from it would have desired fuel properties in terms of cetane number and viscosity. , Also, a good oxidative stability is expected from it by virtue of the relatively low amount of polyunsaturated fatty acids (linoleic and linolenic) in it as compared to rapeseed and soybean oils . These differences in FA contents in neem oil and widely studied rapeseed and soybean oils have motivated several combustion studies on biodiesel from neem oil. ,− For example, some recent experimental studies in diesel engines fueled with neem oil-derived biodiesel/diesel blends report an enhancement in brake thermal efficiency and a reduction in soot, CO, and unburnt hydrocarbon emissions, as compared to pure diesel, though NO x emission increases. ,,, However, no studies on the characteristics of soot produced from neem-derived biodiesel could be found in the literature. Moreover, while there is sufficient evidence in the literature that blending biodiesel with diesel has a substantial effect on reducing soot emissions from diesel engines and on the reduction of primary particle size in soots, their effects on the soot characteristics are still less understood.…”

“…47,56−58 For example, some recent experimental studies in diesel engines fueled with neem oilderived biodiesel/diesel blends report an enhancement in brake thermal efficiency and a reduction in soot, CO, and unburnt hydrocarbon emissions, as compared to pure diesel, though NO x emission increases. 31,47,58,59 However, no studies on the characteristics of soot produced from neem-derived biodiesel could be found in the literature. Moreover, while there is sufficient evidence in the literature that blending biodiesel with diesel has a substantial effect on reducing soot emissions from diesel engines 60 and on the reduction of primary particle size in soots, 46 their effects on the soot characteristics are still less understood.…”

Comparative studies on emission reduction in thermal barrier coated engine using single blend ratio of various non-edible oils

“…Figure 6 shows the variation of CO emission for diesel and other prepared samples for coated and uncoated engines at different engine load conditions. There were many factors contributing to CO emission like combustion temperature, combustion pressure, air fuel mixture ratio and oxygen content in fuel [21]. In uncoated engine with high load condition, the diesel produces 0.15 %vol., and the biodiesel samples such as B1, B2 and B3 produce 0.13, 0.05 and 0.06 %vol.…”

“…Also, 20 percent ratio of fuel sample with above coating showed a better result than other fuel samples. Biodiesel was prepared from Pongamia pinnata and neem oil by transesterification with aluminium titanate [21] as a coating material in diesel engine. This combination was noticed with lower emission than other fuel samples in same engine operating condition.…”

Effect of Injector Opening Pressure on Dairy Scum Biodiesel Operated Diesel Engine

“…The lower blends of dual biodiesel (pongamia pinnata and neem oil) result in better engine performance and slightly higher in comparison petro-diesel. [31].…”