LAUSR

Abstract Heterogeneous combustion is an advanced combustion technique in which a porous ceramic support is immersed into a combustion chamber to provide heat redistribution through the chemical reaction wave. Within this work a support made of magnesia partially stabilized zirconia (MgO-ZrO 2 ), a fast O 2- ionic conductor, is used to evaluate gadolinia doped ceria (Ce 0.8 Gd 0.2 O 1.9 ), and lanthanum cobaltite (LaCoO 3 ) as solid catalysts to promote lean methane combustion. By utilizing temperature profiles of the combustion chamber, collection of radiative and acoustic emissions, it was found that both Ce 0.8 Gd 0.2 O 1.9 and LaCoO 3 are effective combustion catalysts, with LaCoO 3 being even better performing, which enable higher maximum temperatures within the combustion chamber and extend lean flammability limits of methane-air combustion.