| 摘要 |
An iron oxide containing precursor to a catalyst for e.g. ammonia synthesis, having a surface area above 10 m2xg-1 also containing alumina and an alkaline earth. The alkaline earth may be present as an alkaline earth aluminate. The composition may be made by precipitation followed by calcination. For use as an ammonia synthesis catalyst precursor, an alkali metal, e.g. potassium, is preferably incorporated into the composition to promote catalytic activity. The presence of "free" alkaline earth, as opposed to alkaline earth aluminate reduces the amount of alkali metal required. |
