Abstract
The present study performed spray combustion experiments of alcohol aqueous solution/heavy oil emulsified fuel to investigate the effects of alcohol concentration on the flame temperature and exhaust gas concentration. In the experiment, the emulsified fuel is produced by mixing heavy oil A and an ethanol aqueous solution by varying the ethanol concentration of the solution. The emulsified fuel flame shows the maximum temperature closer to the burner than the heavy oil flame, indicating that the combustion characteristics are improved in the emulsified fuel owing to the micro-explosion. In addition, a decrease in NOx concentration is observed in the emulsified fuel with increasing the ethanol concentration in the solution.
