Combustion and NOx emissions of biomass-derived syngas under various gasification conditions utilizing oxygen-enriched-air and steam

► Syngas is derived from a pilot-scale biomass gasifier using oxygen and steam. ► NOx emissions from the burner are characterized for different operating conditions. ► NH3 and NOx increase for oxygen-and-steam gasification conditions. ► The increase in NH3 and NOx is correlated with the high nitrogen content in biomass.