We report the performance of a standard commercial micro gas turbine on biomass producer gas and mixtures of biomass producer gas with natural gas. The micro gas turbine delivers full power on gas mixtures with a net heating value of at least 15 MJ/Nm 3. For gas of lower heating value, the maximum fuel gas flow limits the attainable power. At reduced power, the lower limit for stable operation is a net heating value of about 8 MJ/Nm 3. The gross efficiency of the micro gas turbine depends on output power but not on the gas heating value, within our measurement accuracy. Above 70% of full power, emissions of CO, unburned hydrocarbons and NO are over 200 times, 15 times and 3 times lower than those of a gas engine of similar size. At part load below 70% of full power, the micro gas turbine burner switches to a different operating mode which produces higher CO and NO levels. The CO emission remains far below that of a gas engine, the NO emission becomes similar.
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