Comparative analysis of green diesel versus petro- diesel in compression ignition engine Vijander Kumar 1 *, Rakesh Kumar Sindhu 2 and Sandeep Kumar 3 1 Assistant Professor Sant Longowal Institute of Engg. & Technology, Longowal - 148106, Punjab, India 2 M.R.K. Institute of Engineering and Technology, Rewari -123401 3 Assistant Professor Lovely Professional University Phagwara - 144411, Punjab, India ABSTRACT Biofuel based energy is likely to be promoted to reduce the dependency on fossil fuels. The most common alternative fuel is FAME biodiesel that is produced by trans esterifcation. But some disadvantages are also associated with biodiesel; new technologies are under investigation for the production of other biofuels. In the present study green diesel was produced by hydro processing of waste cooking oil. The performance and emission characteristics of green diesel were investigated in single cylinder CI engine. The results were also compared by the corresponding results obtained by conventional diesel fuel. The engine was tested in a series of steady state operat- ing conditions at different load by keeping constant speeds of 1500 rev/min. The performance parameters like brake thermal effciency (BTE %), specifc fuel consumption (SFC in kg/h) and emissions parameters like HC, CO 2 , CO and NOX emissions were investigated. It was observed that BTHE of green diesel is 23% and 21.76% for petro diesel at 20% load, at 40% load it is 34.24% for green diesel and 25.8% for petrol diesel at 60% load it is 35.93% for green diesel and 31.74 for petro diesel at 80% load it is 38.24 for green diesel and 31.66 % for petro diesel at 100% load it is 31.6% for both green diesel and petro diesel These results show that BTHE increases for green diesel fuels at all load except full load condition. From the results, it was found that for green diesel BSFC(kg/kwh) is1.83 for green diesel and 2.57 for petro diesel at no load condition and at full load it is 0.267for green diesel and 0.270 for petro diesel which is less as compare to petro diesel. It was observed that CO (%VOL) at load (%) 20,40,60,80,100 for green diesel are 0.06, 0.03,0.02,0.02,0.03 and for petro diesel are 0.06,0.04,0.03,0.03 and 0.04 respectively. It is observed that HC (PPM) emission at load (%) 20,40,60,80,100 for green diesel are 14, 21,20,18,25 and for petro diesel are 27, 29.25,24 and 32 respectively. It was observed that NOx (PPM) emission at load (%) 20,40,60,80,100 for green diesel are 217,511,846,1047,978 and for petro diesel are 256,533,994,1129 and 1114 respectively. It was observed that smoke (%VOL) at load (%) 20,40,60,80,100 for green diesel are 7.3,8.7,10.7,20,35 and for petro diesel are 21.2,28.5,42.2, 54.7and 69.1 respectively. From the emission results it is concluded that green diesel (i.e. CO emission hydrocarbon emissions, smoke density and nitrogen oxides emissions) are better than the conventional diesel. KEY WORDS: GREEN DIESEL, HYDRO PROCESSING, ENGINE PERFORMANCE, EMISSIONS 128 ARTICLE INFORMATION: *Corresponding Author: dvijander@gmail.com Received 10 th Jan, 2018 Accepted after revision 15 th March, 2018 BBRC Print ISSN: 0974-6455 Online ISSN: 2321-4007 Thomson Reuters ISI ESC / Clarivate Analytics USA and Crossref Indexed Journal NAAS Journal Score 2017: 4.38 SJIF 2017: 4.196 © A Society of Science and Nature Publication, Bhopal India 2018. All rights reserved. Online Contents Available at: http//www.bbrc.in/ DOI: 10.21786/bbrc/11.1/18 Technological Communication Biosci. Biotech. Res. Comm. 11(1): 128-135 (2018)