Abstract: One embodiment of the present disclosure relates to a combustor assembly which has a burner assembly and a combustor. The burner assembly has a body having a first end and a second end and a center passageway. The center passageway extends between the first end and the second end of the body. The body of the burner assembly is provided with a biomass inlet for receiving biomass, a primary air inlet for receiving air, a gas inlet for receiving gas, and a secondary air inlet for receiving air. The biomass inlet is in communication with the center passageway.

Abstract: A cyclonic combustor comprising a combustion liner forming a combustion chamber having a generally cylindrical shape, a biomass feed inlet for receiving biomass particles under pressure, wherein the biomass feed inlet is formed so that the biomass particles are introduced into the ignition zone of the combustion chamber with a tangential component relative to the longitudinal axis of the combustion liner, and a plurality of air tuyeres formed through the combustion liner for receiving compressed air, wherein the plurality of air tuyeres are arranged to introduce the compressed air into the combustion chamber with a tangential component relative to the longitudinal axis of the combustion liner. A direct-fired biomass-fueled pressurized gas turbine system comprising a pressurized feed system, the cyclonic combustor, and a gas turbine. Methods of operating a cyclonic combustor and methods for direct firing a gas turbine.