Effect of FFA of Jatropha Curcas L Oil on Performance and Emissions of a DI Diesel Engine Ashok Leyland

Format:

Conference/Event

Author/Creator:

A. A., author.

Contributor:

K, Sairam

Puhan, Sukumar

V, Ganesan

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

Oil with high free fatty acid (FFA) content may not be anappropriate contestant for biodiesel production due to poor processyield. The high FFA content (1%) will cause soap formation and theseparation of products will be exceedingly difficult, and as aresult, it has low yield of biodiesel product. In order to increasethe process yield, pretreatment setup is required. This involvesadditional cost and will increase overall fuel price. Hence crudevegetable oils having high FFA can be blended with diesel foreffectual employment in diesel engines. In this context, JatrophaCurcas L, non-edible tree-based oil with higher FFA content, can beconsidered as one of the prominent blending sources for diesel. Theprimary objective of the present work is to analyze the effect ofFFA content of crude Jatropha Curcas L oil (CJO) on performance andemission characteristics of a direct injection (DI) diesel engine.The effect of FFA on some of the critical fuel properties was alsoinvestigated.In the present study, the CJO with five different FFApercentages (5.1, 7.6, 10.1, 12.7, and 14.9 %) were collected andblended in the ratio of 80:20 (diesel:CJO) on volume basis. Theeffect of FFA content on density, viscosity, cetane number, heatingvalue, volatility characteristics, and oxidative stability wasinvestigated. From the measurements it was observed that thedensity, viscosity, and distillation temperatures were found toincrease with increase in FFA content in the blend; while cetanenumber, heating value, and oxidative stability were observed todecrease with increase in FFA content. As compared to diesel,density, kinematic viscosity, and distillation temperatures werehigher for such blends and the difference in magnitude ranges by 3to 7.5% for density, 2.2 to 4.6 times in kinematic viscosity, andby 24 to 58°C in T50 temperature. However, cetane number of theblends increased while the heating value decreased when compared todiesel. The cetane number of blends was found to be higher by 4.3to 19.1%; whereas heating value was observed to be decreased by 3to 7.9% as compared to diesel. To study the performance andemissions, tests were carried out in a DI diesel engine atdifferent loads. The effect of FFA content on brake specific fuelconsumption, brake thermal efficiency, oxides of nitrogen, andsmoke was investigated. It is found that the brake thermalefficiency and smoke decrease; while oxides of nitrogen increaseswith increase in FFA content. The magnitude ranges by 0.33 to 2.04%in brake thermal efficiency, 5.4 to 27% in smoke, and 3.4 to 21.7%in oxides of nitrogen for blends as compared to diesel. From thepresent study, it can be concluded that the blend of CJO (80:20diesel:CJO) up to 5.1% FFA content can be considered as a potentialblending agent for diesel fuel

Notes:

Vendor supplied data

Publisher Number:

2012-01-1318

Access Restriction:

Restricted for use by site license