The Combustion Of N-butanol

The research of alternative fuel is an effective way to solve the vehicle energy crisis. Researchers paid lot of time on the methanol, ethanol, dimethyl-ether and other alternative fuels. However, they failed to solve these alternative fuels' disadvantages. In recent years, bio-butanol production method is a major breakthrough. Butanol has high calorific value, ignition temperature close to gasoline and good physical and chemical properties, which are concerned by researchers. In this paper, different boundary conditions on influence of the n-butanol combustion properties was done, and a comparative study of the combustion performance of gasoline and n-butanol was studied on a Constant Volume Combustion Bomb.Pressure before ignition is 0.8MPa,1.2MPa, Initial temperature is150℃,. Combustion characteristics of n-butanol affected by excess air ratio is that Near the theoretical air-fuel ratio, Butanol mixture burn rate is the fastest, The combustion pressure reaches maximum, Combustion period is relatively shorter, ignition delay is shorter; As the excess air ratio increases or decreases, the combustion rate slowes down, the Peak combustion Pressure reduces, the ignition delay Period is extended.Initial temperature is150℃, excess air ratio is 0.5,1.0,2.0, Pressure before ignition is 0.8MPa,1.2MPa,1.6MPa. Combustion characteristics of n-butanol affected by pressure is that With the increase of the boundary Pressure, the peak combustion pressure increases with higher ratio of pressure rise and higher peak and combustion period and igniton delay is shorter obviously. pressure effect on the darker and more dilute mixture gas mixture combustion properties is particular. High pressure can significantly reduce the ignition delay and combustion period. Combustion pressure and the pressure rise rate are larger.By comparing the theoretical air-fuel ratio, the initial temperature of 250℃, pre-ignition under pressure 1.2MPa, the combustion pressure, the pressure rise rate, and combustion temperature, combustion heat release of n-butonal and 93# gasoline is very similar. However, N-butanol Ignition delay and combustion duration is significantly behind the petrol. Pressure rise rate and pressure peak is lower than gasoline.