Combustion and emission characteristics of a diesel engine fuelled with jatropha and diesel oil blends

Abstract

The depletion of oil resources as well as the stringent environmental regulations has led to the development of alternate energy sources. In this work the combustion, performance and emission characteristics of a single cylinder diesel engine when fuelled with blends of jatropha and diesel oil are evaluated. Experiments were conducted with different blends of jatropha oil and diesel at various loads. The peak pressures of all the blends at full load are slightly lower than the base diesel. There is an increase in the ignition delay with biodiesel because of its high viscosity and density. The results show that the brake thermal efficiency of diesel is higher at all loads followed by blends of jatropha oil and diesel. The maximum brake thermal efficiency and minimum specific fuel consumption were found for blends up to B20. The specific fuel consumption, exhaust gas temperature, smoke opacity and NOx were comparatively higher. However there is an appreciable decrease in HC and CO2 emissions while the decrease in CO emission is marginal. It was observed that the combustion characteristics of the blends of esterified jatropha oil with diesel followed closely with that of the base line diesel

Exhaust Measurement and Emission Control – Biodiesel Involvement in Diesel Engine

“…Also the Y2JE15 emulsion practiced a fall in the brake thermal efficiency by 11.5%. The increase in brake thermal efficiency of JE10, JE15 and Y2JE10 are the development of the combustion process on report of better oxygen content in the different fuels [11]. In case of Y2JE15 emulsions, thermal efficiency is fall down with minimum calorific values of the fuel blends and poor mixture creation.…”

Experimental Analysis of Jatropha Curcas Bio-Diesel for Optimum Blend Characteristics

“…Fig. 6 shows the variation of NOx with respect to brake power [12]. At higher power output conditions, due to higher peak and exhaust temperatures the NOx values are relatively higher compared to low power output conditions.…”

Performance and Emissions Characteristics of Crude Jatropha Oil Biodiesel Blends in a Diesel Engine

“…This biodiesel has a high cetane number compared to diesel, less sulfur and contains more oxygen, almost 10% oxygen by weight. These characteristics are environmentally friendly and can reduce the hydrocarbon (HC), carbon monoxide (CO), and PM emissions in the exhaust gas [10][11][12][13][14][15]. For these reasons, different studies have been conducted on biodiesel blended with diesel showing that emission concentration (CO, CO 2 , HC, PM, NOx) varies and it all depends on the source of the biodiesel and the engine combustion system.…”

“…The performance of prepared waste frying oil (WFO) was compared with diesel using the four-cylinder compression ignition engine of the Land Rover TDI 110 and the results showed that for CO and NOx the emissions are lower than those for petroleumbased diesel [11,12]. Other than that, preheated crude palm oil (CPO) fuel in the test engine produced higher NOx emissions compared with diesel [16][17][18].…”