The effect of chloride ion on ruthenium supported catalyst for ammonia synthesis

Ruthenium catalyst is considered as a new type catalyst for ammonia synthesis after the classical iron fused catalyst. Chloride ion is a poison to the catalyst. This article summarizes the source of the chloride,its state in the catalyst, poisoning effect to the catalyst and the method to remove chloride. It is one of the key points to achieve high catalytic performance for ammonia synthesis.