Synthesising Oxygenated Fuel Blends and Analysing their Effect on Engine Performance and Emissions

Abstract

In compliance with proposed targets of green energy and reduced emissions during the Glasgow summit, the study of blended fuels in internal combustion engines is of great significance. To address this issue, a detailed study on CI engine is needed with biofuels. The biofuels can be utilized in old/new diesel engine without engine modification. newlineDiesel engines are compatible with a wide range of liquids, including alcohols, biodiesels, and vegetable oils. The present study include biodiesel synthesis using waste soybean cooking oil (WSCO) and use of ternarytblendstof additive-biodiesel-ultra-lowtsulfurtdiesel (ULSD)tin a CI engine. The present work identifies appropriate additives for ternary fuel blends that will enhance engine performance and tailpipe emissions. Regressiontmodelst wereteshablished and verified totbetstatisticallytsignificant in order to further investigate thetimpacttof input variables ontresponses. newlineFor this purpose, an experimental research was conducted on a singletcylinder,tfourtstroke, variabletcompressiontratiotdieseltengine equipped with exhausttgastrecirculationt(EGR) system. The enginetperformancetandtemissions were examined with diethyl ether (DEE) and nitromethane (NM) using the optimized WSCO biodiesel-ULSD blends as the base fuel. The differenttproportionstoftWSCO biodiesel-ULSD blendstweretprepared, ranging from 20% to 35% on a volume basis (v/v). These blends were denoted by B20EGR15, B25EGR15, B30EGR15, and B35EGR15. DEE-B35EGR15 blends were prepared by varying the concentration of diethyl ether in the B35EGR15 from 5 15% (v/v) and labeled as DEE5B35EGR15, DEE10B35EGR15, and DEE55B35EGR15. NM-B35EGR15 blends newline[Ph.D. Thesis]tt ASHISH DUBEY v newlinewere prepared by varying the concentration of nitromethane in the B35EGR15 from 1 3% (v/v) and labeled as NM1B35EGR15, NM2B35EGR15, and NM3B35EGR15. newlineThis study was completed in 4 stages. The first stage comprised biodiesel production from WSCO. In the second stage, engine settings were optimized (compression ratio and injection pressure).