Abstract
Recently, hydrocarbon system refrigerant isobutane (R600a) began to be carried in household refrigerator. The proper processing technology of isobutane is required in order to prepare for recycling of the refrigerator. Isobutane below the inflammable range is oxidized to CO_2 and H_2O by using a palladium catalyst. The catalyst can be suppressed below to a heat-resistant temperature by setting isobutane concentration to 8800ppm or less. Temperature to which all isobutane is oxidized becomes high under increasing of premixture concentration and space velocity.
