• Dr. S. T. Warghat
• A. S. Bombatkar
• Dr. T. R. Deshmukh

CI Engine plays a very important role in transport sector of nation and also contributes to pollution significantly. These engines is used in heavy trucks, buses, locomotives, electric generators, farm equipment, underground mine equipment etc. [1]. Pollutants from diesel engines include carbon monoxide (CO), carbon dioxide (CO2), sulphur oxides (SOx), nitrogen oxides (NOx), and particulate matter (PM). It is possible to reduce pollutant emissions in exhaust gases by using the different kind of fuels and additive, these are significant factors in the composition of exhaust gases. In diesel engines, alternative fuels are used for both reducing the consumption of petroleum-based fuels and pollutants in the exhaust gases. [2] There are many tree species which bear seeds rich in oil. Of these some promising tree Species have been evaluated and it has been found that there are a number of them such as Jatropha curcas and PongamiaPinnata (‘Karanja’) which would be very suitable in our conditions. Highcetane number and calorific value that is approximately equal to diesel fuel make it possible to use Jatropha oil in diesel engines. Oxygenated hydrocarbon fuels derived from biomass are attracting considerable attention either as replacements of, or additives to, conventional hydrocarbon fuels in internal combustion engines. They offer potential benefits as renewable fuels, with a long-term zero CO2debt, and the tendency to reduce soot formation [3-5]. Dimethyl carbonate, being non-toxic and highly miscible with diesel fuels, is one of such promising clean fuels. Carbon-carbon bonds are absent in the DMC molecular structure which contains three oxygen atoms. In a diesel engine study, Miyamoto et al. [4] found that the extent of soot reduction mainly depended on the amount of oxygen present in the fuel. Although the fuel’s structure and the particular combustion conditions are of non-negligible influence on the emissions, it is worthwhile to consider the high oxygen content (53% by mass) of DMC: it suggests that DMC addition in small amounts could achieve significant soot reduction. Specifically, Rubino and Thomson [6] used a counter-flow propane/air diffusion flame to study the inhibition of soot precursor formation by adding oxygenated compounds includingDMC. They observed a remarkable reduction of soot precursors such as acetylene (C2H2) and benzene (C6H6), as well as a linear relationship between the C2H2concentration and the additive’s oxygen and C-C bond content.. However, these benefits are achieved at the expense of increased emissions of oxygenated pollutants such as formaldehyde (CH2O) [11].

Compression Ignition (CI) engine, Biodiesel, Additive, Alternative Fuel Dimethyl carbonate

"Experimental Investigation on Effect of Using Dimethyl Carbonate as Additive with Jatropha Oil Methyl Ester in CI Engine", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.174-178, April-2019, Available :http://www.jetir.org/papers/JETIR1904B26.pdf

"Experimental Investigation on Effect of Using Dimethyl Carbonate as Additive with Jatropha Oil Methyl Ester in CI Engine", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp174-178, April-2019, Available at : http://www.jetir.org/papers/JETIR1904B26.pdf