Combustion of hydrogen-air in micro combustors with catalytic Pt layer

摘要: Abstract Micro power generators have high density. However, their key components micro combustors low stability. In this experiment, catalyst is applied to improve the The catalytic combustor made from an alumina ceramic tube. It has inner diameter of 1 mm, outer 2.02 mm and length 24.5 mm. prepared through impregnation aqueous solution H2PtCl6. flammability limits surface temperatures under different operation conditions are measured. flow rates range 0.08 0.4 L/min. According experimental results, effective inhibit extinction. For example, At 0.8 L/min, stability limit 0.193–14.9 in non-catalytic combustor. After applying catalyst, lean near 0, rich 29.3. But less blow out. Increasing also inhibits combustor, while increase 0.2 L/min, decreases 0.193 0.125. results indicate that induces shift downstream stoichiometric cases. numeric simulation verifies heterogeneous reaction weakens homogeneous consuming fuels. Thus, insufficient heat recirculation makes region downstream. mixture intense attributed mass diffusion thermal mixture.