Micro Gas Turbine Operation with Biomass Producer Gas
L.P.L.M. Rabou, J.M. Grift, R.E. Conradie, S. Fransen , F. Verhoeff, ECN Nethelrlands, August 2007

ABSTRACT: We report the performance of a 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 heating value of at least 15 MJ/Nm3. For gas of lower heating value, the maximum fuel gas flow limits the attainable power. The lower limit for stable operation is about 8 MJ/Nm3. 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 and NO are 40 and 10 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, but still significantly below those of a gas engine.

Keywords: biomass conversion, emissions, gas turbines

Contribution to the 15th European Biomass Conference, Berlin, May 2007