The Effect of Electromagnetization Fuel using Bioethanol-RON 90 Blends on Exhaust Emission Engine 125 CC

: Research related to using bioethanol as a renewable energy that can be fuel substitution for gasoline with hopefully can decreasing exhaust emission has been carried out by researchers. Beside that, most of the researchers using magnetic fields to improve the quality of combustion for decreasing exhaust CO emission. Therefore, the objective of this research was to determine the effect of electromagnetization fuel using Bioethanol-RON 90 blends on exhaust emission engine 125 CC. The independent variable of the study is the variation of the fuel composition based on percent volume and engine speed (RPM) while the dependent variable is the exhaust gas emissions. Giving the electromagnetic effect causes the combustion efficiency which is shown by the the reduced amount of incomplete combustion gas emissions. The combustion efficiency occurs due to the effect of the phenomenon of fuel magnetization in the combustion chamber causing polarization (due to magnetic induction) on hydrocarbon molecules. The results of this study is E20 (20% Bioethanol blend with 80% RON 90) is the best composition fuel. Using E20 with exposure electromagnet at 3000 rpm can decrease approximately 47.37% carbon monoxide emission, increase approximately 26% carbon dioxide, and decrease approximately 33.2 % oxygen emission.