Flame stabilization between two beds of alumina balls in a porous burner

Conditions for flame stabilization in a porous media combustor formed by two beds of different sizes of alumina balls were studied. Premixed combustion of lean methane–air mixtures were used as variables. Measurements performed included temperature profiles and chemical products compositions. Stabilized flames were observed in the range of volumetric flow rate from 7.01 l/min to 19.00 l/min at equivalence ratio of ϕ = 0.6 and ϕ = 0.7. Low pollutants emissions were found in the entire operation range.