Safe handling of tritium is a current concern to be solved in the course of tritium removal facility that is being planed in the Wolsong nuclear power plant. Almost all tritium decontamination systems proposed for tritium removal facilities employ catalytic oxidation to water, followed by drying, to remove tritium from gas stream. A series of experiments have been conducted to assess the catalytic recombination characteristics of hydrogen in an air stream by using precious metal/alumina catalysts. The H₂ to H₂O fractional conversion was determined at various catalyst temperatures (25∼150℃ and flow rates(5∼1.5L/min).