Performance and emission characteristics of a diesel engine fuelled by neem oil blended with alcohols

Fuel crisis and environmental concerns have led researchers to look for alternative fuels of bio-origin sources such as vegetable oils, which can be produced from forests and oil-bearing biomass materials. Vegetable oils have energy content comparable to that of diesel fuel. Straight vegetable oils posed several operational problems and durability problems when subjected to long-term usage in compression ignition engine. These problems are attributed to higher viscosity and lower volatility. In this study, performance and emission parameters of a diesel engine operating on neem oil and its blends of 5, 10, 15 and 20 vol% with ethanol, 1-propanol, 1-butanol and 1-pentanol are evaluated and compared with diesel operation. The results indicate that the brake thermal efficiency is improved with the use of neem oil–alcohol blends with respect to those of neat neem oil. The smoke intensity, CO and HC emissions with neem oil–alcohol blends are observed to be lower with respect to those of neat neem oil at higher loads. The NO x emission is very slightly reduced with the use of neem oil–alcohol blends except for the neem oil–ethanol blend compared with that of neat neem oil.

[1]  Liang Zhang,et al.  Combustion and emission characteristics of a two-stroke diesel engine operating on alcohol , 2005 .

[2]  V. Makarevičienė,et al.  Influence of fuel oxygen content on diesel engine exhaust emissions , 2006 .

[3]  Tadashi Murayama,et al.  A Method to Improve the Solubility and Combustion Characteristics of Alcohol-Diesel Fuel Blends , 1982 .

[4]  Avinash Kumar Agarwal,et al.  Performance evaluation of a vegetable oil fuelled compression ignition engine , 2008 .

[5]  Gvidonas Labeckas,et al.  Comparative performance of direct injection diesel engine operating on ethanol, petrol and rapeseed oil blends. , 2009 .

[6]  Murat Hosoz,et al.  Performance and emission characteristics of a diesel engine using isobutanol–diesel fuel blends , 2009 .

[7]  A. Agarwal,et al.  Experimental investigations of performance and emissions of Karanja oil and its blends in a single cylinder agricultural diesel engine , 2009 .

[8]  Avinash Kumar Agarwal,et al.  Performance, Emission and Combustion Characteristics of Jatropha Oil Blends in a Direct Injection CI Engine , 2009 .

[9]  Tadashi Murayama,et al.  Low Carbon Flower Buildup, Low Smoke, and Efficient Diesel Operation with Vegetable Oils by Conversion to Mono-Esters and Blending with Diesel Oil or Alcohols , 1984 .

[10]  Chung-Bang Chen,et al.  Effects of methanol-containing additive on emission characteristics from a heavy-duty diesel engine. , 2001, The Science of the total environment.

[11]  Moh'd Abu-Qudais,et al.  The effect of alcohol fumigation on diesel engine performance and emissions , 2000 .

[12]  Masayuki Onodera,et al.  Performance of a Diesel Engine Fueled by Rapeseed oil Blended with Oxygenated Organic Compounds , 2002 .

[13]  Octavio Armas,et al.  Emissions from a diesel–bioethanol blend in an automotive diesel engine , 2008 .