Investigation on Performance and Emission Indices of Coconut Oil Biodiesel/MWCNT/n-Octanal Blends in Water Cooled Compression Ignition Engine

Abstract

Petroleum products such as petrol and diesels are being used as a fuel to the running of Internal Combustion Engines. Day by day demands for the petroleum products is increasing since its rate of consumption is increasing. If the trend will continue the whole world may suffer from shortage of petroleum products. Therefore, it is necessary to find different ways of reducing fuel consumption and at the same time to improve the performance of IC engine; it is necessary to find out some additives to mix it with the mixture of petroleum product and alternative fuel and one can formulate a new fuel. So, the project’s focus is given to improve the performance of CI engine using diesel a The tests are run at 1500 rpm with varying loads on the diesel, cottonseed oil, n-Octanol and multi walled Carbon nano tubes (MWCNT) mixtures. i.e., BM1(Diesel 75%+ Coconut oil biodiesel 20%+ n-Octanol 5%), BM2(Diesel 75%+ Coconut oil biodiesel 20%+ n-Octanol 5%+ MWCNT 25ppm), BM3(Diesel 75%+ Coconut oil biodiesel 20%+ n-Octanol 5%+ MWCNT 50ppm), BM4(Diesel 70%+ Coconut oil biodiesel 20%+ n-Octanol 10%), BM5(Diesel 70%+ Coconut oil biodiesel 20%+ n-Octanol 10%+ MWCNT 25 ppm), BM6(Diesel 70%+ Coconut oil biodiesel 20%+ n-Octanol 10%+ MWCNT 50ppm). The findings indicate that incorporating cottonseed oil leads to an improvement in brake thermal efficiency, along with a decrease in specific fuel consumption and exhaust gas temperature. By increasing the amount of cottonseed oil in the blend, the emission parameters such as CO, CO2, NOx, and O2 are reduced, while HC emissions increase. Adding n-octanol and graphene to the cottonseed oil blend diesel fuel has a comparable impact to adding pure cottonseed oil in different proportions. This leads to an increase in brake thermal efficiency, a decrease in specific fuel consumption, and a reduction in exhaust gas temperature.