AD-946 Ammonia decomposition catalyst is made from sintered MgO carried with active component of Ni and other additives. It is provided with the properties of great catalytic activity, high mechanical strength, and excellent thermal and coking resistance. It is used in the ammonia decomposing furnace to decompose the HN₃ and HCN into N₂, H₂ and CO₂, and so as to effectively purify the coke-oven gas for the sake of environmental protection and prevent the equipment from corrosion.