This　paper　describes　the　catalytic　combustion　of　ventilation　air　methane　in　a　new　pilot　scale　reverse-flow　reactor,　which　can　maintain　elevated　temperatures　and　be　capable　of　achieving　high　methane　conversion　in　air　streams　at　methane　concentrations　as　low　as　0.2%　by　volume.　The　effects　of　the　initial　temperature,　switch　time,　space　velocity　and　humidity　on　the　reactor　performance　was　investigated.　The　results　showed　that　active　component　Pd　dispersed　evenly　on　the　surface　of　the　catalyst　benefited　to　methane　catalytic　reaction.　Reduction　was　useful　for　the　improvement　of　catalyst　performance　on　methane　conversion.　Short　switch　time　can　reduce　exhaust　gas　heat　loss　and　the　reactor　can　sustain　itself　under　the　low　concentration　of　feed　gas.　The　reactor　system　would　eventually　achieve　different　cyclic　steady　state　when　the　inert　and　catalyst　sections　were　pre-heated　to　the　appropriate　temperature.　Methane　conversion　decreased　due　to　the　decrease　of　the　catalyst　activity　produced　by　water.