A spinel-type oxide is appropriate for use as a catalyst material due to excellent thermal stability and mechanical strength, although the catalytic use is restricted because of low surface area. Unimodal Porous Spinel (UPS) can be prepared by a simple impregnation method using the pore-controlled γ -alumina prectirsor. The sharp pore distribution was definite in calcined UPS, and it has a high surface area of more than 115 m~2/g-Al_2O_3. Two or three metal sources can also be impregnated by this method. The catalyst using UPS of the ZnAl_2O_4, system as a support showed good performance on durable activity in dehydrogenation of isobutane.
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