• vishwanath Nagaraj Karoor
• Prof. Saraswathi reddy
• Smt. Rashmi Khambenour
• Prof. Shashikant R Mise

With increase in population there is increase in energy demand for various human activities throughout the globe. Conventional fuels are characterized with environmental calamities. Biodiesel is one of emerging tool at global level not only in reducing concentration of exhaust gases from diesel engines but also in fulfilling demand of fuels for an extent. With concept of combination of two different biodiesels this study has been done. This study has been done with the analysis of diesel engine performance and its emission characteristics using Jatropha, Madhuka Indica and their combination of biodiesels at 10, 20, 30 and 40% blends. There is only a slight increase of 0.6% to 2.0% in density value for every change in the blend ratio. Result confirms that all biodiesels posses flash and fire point values of same range. Jatropha biodiesel at B40 has shown maximum increase in viscosity value of 46% in comparison with conventional diesel. Engine performance examination test revealed that there are no as such significant changes in the engine performance. There is an increase of mere 2.6%, 2.9% and 3.2% in brake power of the engine, 15%, 11.3.% and 11.5% in brake thermal efficiency and a reduction of 17%, 11.4% and 11.4% in specific fuel consumption at Jatropha B30, Madhuka Indica B30 and combination B40 respectively. In exhaust gas analysis, NOx, CO and HC gases were analyzed and this was compared with BS IV, in which B30 of Madhuka indica biodiesel, B10 of Jatropha and combination biodiesel were proved to be most effective blends.

Transesterification, Free fatty acid, Bharat standards IV and Bio diesel, etc.

"study on performance and emission characteristics of diesel engine using different bio diesels. ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.624-637, June 2019, Available :http://www.jetir.org/papers/JETIR1907C51.pdf

"study on performance and emission characteristics of diesel engine using different bio diesels. ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp624-637, June 2019, Available at : http://www.jetir.org/papers/JETIR1907C51.pdf