Resirkulering av katalysator

Offentlig prosjektsammendrag

Combustion of Ammonia to NOx is a key step in the production of fertilizers. Laughing gas is an undesired by-product in this combustion process, and Yara has developed and commercialized a catalyst which removes most of the laughing gas. This catalyst removes on a yearly basis >10 million tonne of CO2eq. The catalyst efficiency slowly degrades with time, and after several years of operation the catalyst needs be replaced by fresh catalyst. As the catalyst contain Cobalt, Yara want to look into methods to recycle the spent catalyst with the purpose of re-using in the nitric acid plants. Several methods to recycle the material and regenerate the catalyst efficiency will be explored by laboratory scale screening, pilot scale testing and finally long term testing under industrial conditions.