Patent ID: RE39041

Claim:
A method of decomposing ammonia in a gas with an ammonia decomposition catalyst comprising a crystalline silicate carrier of the formula (1±0.8)R 2 O.[aM 2 O 3 .bAl 2 O 3 ].cMeO.ySiO 2 , wherein R denotes an alkaline metal ion and/or hydrogen ion, M denotes at least one element selected from the group consisting of VIII group elements, rare earth elements, titanium, vanadium, chromium, niobium, antimony or gallium, Me denotes an alkaline earth metal, wherein a≧0, b≧0, c≧0 a+c=1, y/c>12 and y>12, and iridium as an active metal, wherein the gas containing ammonia is exposed to said catalyst, thus decomposing and removing the ammonia.