Biomass gas is remarked as renewable energy. Therefore combustion of biomass gas has been noted, but there is a problem that heating value is low. So, the effective combustion technology has been studied for useful energy. The combustion method with using the low temperature plasma at atmospheric pressure attracts attention. It is reported that the optical emission profile at the discharge area between the electrodes shows that the plasma has fuel make CH* radical. It is possible to enhance plasma-assisted combustion with these radicals. In this study the micro flame of methane, hydrogen and fuel gas diluted with nitrogen is formed. The flame behaviors and combustion characteristics with plasma-assisted combustion are investigated. It promotes the stability of flame. It is certified that plasma-assisted combustion is effective for biomass gas and low-grade fuels.
