A two zone turbulent flow laboratory reactor has been constructed and validated for use in staged combustion studies. A premixed fuel/air feed enters the toroidal backmixed primary zone. The effluent mixes with additional injected oxidant and/or steam, and then enters the linear flow secondary zone. This sequence emulates many large scale combustors. Extracted gas samples from cooled probes located in each zone are subjected to several dedicated on-line gas analyzers, and separation/analyses by on-line/batch gas chromatography. Modeling of the combustor is performed with detailed reaction mechanisms and an idealized perfectly stirred reactor + plug flow reactor sequence. The experimental feed rates and measured temperatures are input to the model. Staged combustion for NO minimization has been demonstrated for an ethylene/monomethyl amine feed