Engine Performance and Emission Analysis using Neem and Jatropha Blended Biodiesel

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Mehmood Ali http://orcid.org/0000-0002-1804-2677
Saqib Jamshed Rind http://orcid.org/0000-0003-4881-0419

Abstract

This paper presents the production of biodiesel from indigenous species of Jatropha curcas and Neem (Azadirachta indica) oils, then its engine performance and emission characteristics of B10 blends measured at 1000 rpm. Biodiesel production yields were found 90% and 68% by weight from Jatropha curcas and Neem (Azadirachta indica), respectively. Three prepared biodiesel blends were 10% Neem biodiesel (NB10), 10% Jatropha biodiesel (JB10) and 5% Jatropha + 5% Neem biodiesels (NJB10). The engine emission test showed less carbon monoxide production from NB10 (94 +- 2.15 ppm), followed by JB10 (100+- 2.44ppm) and NJB10 (121 +- 3.65ppm) as compared to diesel (135+- 2.18ppm). However, the carbon dioxide emissions were found higher due to the better combustion characteristics of biodiesel blends as NB10 (3.21%), JB10 (3.06%) and NJB10 (2.53%) than diesel (2.13%) by volume. The reduced amounts of sulphur dioxide (SO2) emissions were found with blended biodiesel fuel in comparison to mineral diesel. Nitrogen dioxide (NO2) emissions were 5 ppm from diesel at 73 C exhaust temperature, while it was increased by using blended biodiesel, to 8 ppm with NB10 due to higher exhaust temperatures 85;33 C. The measured engine power and torque produced from the blended biodiesel samples were slightly lower than the conventional diesel by 12% and 7.7%, respectively. The experimental results showed that an engine performance and emission characteristic of Neem biodiesel (NB10) was better as compared to other biodiesel blends.
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