Abstract
The effect of nanoparticle as additive in Jatropha biodiesel is experimentally investigated in a single cylinder DI diesel engine with the aim of diluting the level of pollutants in the exhaust and for the improvement of engine performance owing to its potential advantage of high surface area to volume ratio, acting as a catalyst for the better combustion. Alumina and Cerium oxide nanoparticles are blended separately with Jatropha biodiesel at 30 parts per million and the engine performance, combustion and emission characteristics are compared with neat diesel and neat biodiesel as base fuels. For alumina blended test fuel, percentage reduction of NO emission by 9 %, Smoke opacity by 17 %, unburned hydrocarbon by 33 % and carbon monoxide by 20 % are observed along with percentage reduction of NO emission by 7 %, Smoke opacity by 20 %, unburned hydrocarbon by 28 % and carbon monoxide by 20 % for cerium oxide blended test fuel. 5 % improvement in brake thermal efficiency is observed for both the test fuels, due to its high surface area to volume ratio of nanoparticle promoting better combustion by improved atomization, better mixing of air-mixture and rapid evaporation of the fuel.
Highlights
There is an increasing demand to find out the biodegradable and environmental friendly fuel to meet the future energy demands
Lower brake thermal efficiency and higher brake specific fuel consumption are observed for neat biodiesel compared to the neat diesel, due to its lower calorific value and higher density nature of biodiesel causing poor atomization of the fuel
6 Conclusions The following conclusions are drawn from the experimental investigation of nanoparticle as addition in Jatropha biodiesel
Summary
There is an increasing demand to find out the biodegradable and environmental friendly fuel to meet the future energy demands. Sajith et al [4] experimented with cerium oxide nanoparticle at 20, 40 and 60 ppm addition in jatropha biodiesel and observed significant reduction of NOx by 30 % and HC by 40 % in a fourstroke, single cylinder, water-cooled compression ignition. The experimental results establish that nanoparticle as additive in fuel results in great impact over the performance and emission characteristics of the engine In this present investigation, the effects of alumina and cerium oxide nanoparticle as additive in jatropha biodiesel on the performance, combustion and emission characteristics of the engine are experimentally determined in a single cylinder four-stroke diesel engine
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