RCAT®-3000 is a nickel-based catalyst on high resistance magnesium oxide carrier, used for decomposition of NH3 in coke oven gas.
Utilization of the catalyst is in ammonia decomposition furnaces upstream of Claus reactors. Catalyst is produced in the shape of Raschig rings with dimensions 20x20x4 cm. As the temperature in ammonia decomposition furnace exceeds 1000 °C, we recommend using the catalyst in combination with ABSM – high purity alumina balls – to extend the catalyst lifetime.
Outlet gas from the ammonia decomposition furnace is further treated in Claus reactors, where sulphur compounds are converted to elemental sulphur. Standard catalyst for the Claus process is alumina based RCAT®-9001.
Process temperature of the Claus reactors is significantly lower than in the case of ammonia decomposition furnace (200-320 °C). Catalyst is supplied in the shape of spheres with diameter 4-6 mm together with high resistance ceramic balls CBSM protecting the catalyst and improving its lifetime.
RCAT®-9002 serves as an alternative catalyst for desulphurization of industrial gases in Claus reactors. In contrast with standard alumina-based Claus process catalyst, RCAT®-9002 contains TiO2 to promote COS/CS2 hydrolysis and to improve overall efficiency of desulphurization process. Even though this catalyst is highly porous, it shows excellent mechanical and temperature resistance. RCAT®-9002 can be used in also in combination with RCAT®-9001.
Oxygen surplus in Claus reactors often leads to a sulphatation of the catalyst. Covering of the catalyst surface with sulphates reduces catalysts activity and overall efficiency of the desulphurisation process.
Increase the catalyst resistance against sulphatation using RCAT®-9003 a RCAT®-9004.
TiO2 based catalyst RCAT®-9003 is produced in a shape of oval extrudates with diameter 3-5 mm. Apart from increased catalytic activity, RCAT®-9003 shows higher resistance against sulphatation. TiO2 based Claus catalyst can be filled in the reactors separately or together with RCAT®-9001 a RCAT®-9002.
Oxygen poisoning of the standard Claus process catalyst can be avoided by using iron promoted catalyst RCAT®-9004. Catalyst improves resistance of standard Claus catalysts. It is produced in shape of spheres with diameter 4-6 mm.