Abstract
Research on combustion of Bio・Ethanol on boilers is begun for reduction of CO_2. Ethanol is dangerous because it has very low ignition-point, therefore the ignition-point of Ethanol is brought down by mixing with water. But combustion of mixture of Ethanol and water is difficult, then it's combustibility is tried to enrich by mixing with heavy oil. Ethanol/water mixture and heavy oil is tend to separate at once. Ethanol/water mixture evaporate, then it's vapor become Ethanol-rich and to easy combustion.
