Effect of butanol oxygenates for B7 diesel on engine performance and exhaust emission

Syed Najmuddin, Syed Hafiz Hakimi (2021) Effect of butanol oxygenates for B7 diesel on engine performance and exhaust emission. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The depletion of fossil fuel resources, along with stringent pollution regulations, has fueled the hunt for more excellent diesel engine performance and cleaner combustion. Using biodiesel/diesel/butanol blend is one of the most significant ways to address these concerns. Throughout this research, the impacts of biodiesel/diesel/butanol additives on the performance and emissions of diesel engines were thoroughly examined. Under varied load circumstances and at an engine speed of 1800 rpm-2200 rpm, the combustion performance and emission parameters of a diesel engine fuelled by butanol/diesel/biodiesel mixes were experimentally examined. Blending with butanol enhanced the evaporation and atomization properties of biodiesel and changed the combustion characteristics of the mixed fuels. The ignition delay of tested fuels increased as the butanol ratio increased. However, when engine loads surpassed 0.38 MPa brake means adequate pressure, the combustion time would decrease as the butanol ratio increased (BMEP). Butanol/diesel/biodiesel blends increased HC emissions under all engine load settings while reducing CO emissions except at 0.13 MPa BMEP for controlled gaseous pollutants. By mixing butanol at moderate and high engine loads, NOx emissions were considerably enhanced. In particulate matter (PM) emission, the peak number concentration of particles smaller than 10 nm rose, whereas bigger particles fell progressively as the butanol ratio increased.

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