Cobalt oxide-based catalyst - with low lead and calcium impurity limits, giving increased activity and stability

摘要

Cobalt oxide (Co3O4)-based catalyst contains 500 (10) ppm Pb (calcd. as elementary Pb), and/or 500 (20) ppm Ca (calcd. as elementary Ca). The catalyst may contain an oxide of Y, Sc or rare earth metal, esp. a cerium 90' (i.e. 90% Ce and bal. other rare earth metals). The catalyst is used for oxidn. of ammonia to oxides of N2.