Investigation on H2/CH4 fueled combustion with partially Pt-loaded porous media

Abstract

To ameliorate the thermal performance of micro combustor and expand its potential applications, a combustor with partially Pt-loaded porous media is constructed. Experiments of H2/CH4 blending combustion in the combustors with different materials for catalyst Pt supported porous media are carried out, and effects of flow rate and fuels blended ratio and porous media setting are also involved. The results show that the nickel-based porous media for supported catalyst Pt achieves stable flame and efficient thermal performance. The homogeneous reactions are inhibited by the global catalytic combustion in the porous media, which reduces the flame temperature in the combustion chamber. The partially inserted catalytic porous media can balance the inhibition of heterogeneous reactions on homogeneous reactions, altering the anchoring of flame and promoting heat-recirculation in the combustion chamber to enhance the combustion stability of H2/CH4/Air. A sub-high temperature region is formed in the combustor downstream, which boosts the radiation performance of the combustor. The #CPC combustor achieves the maximum radiation power and efficiency of 63.7 W and 56.7 %, which represents a 10.3 % increase in radiation efficiency compared to non-catalytic combustion.