[en] A compact removal equipment (TRE), assembled in a console with casters, has been developed for air cleanup of a glove box to be used for handling tritium in some 10 curies. The TRE was designed to remove gaseous tritium in the form of T₂, HT and CH₃T through oxidation with precious metal/alumina catalyst followed by adsorption in zeolite pellets. The present paper reports the results of air cleanup experiments of atmosphere in a glove box by using hydrogen tritide and the HT-to-HTO factional conversions determined under various conditions of catalyst temperature and the gas flow rate