Catalytic stripping method. Catalytic stripping method is used to remove iron pentacarbon from gas, and catalytic stripping method uses adsorbent to remove active metals. This paper only reviews and summarizes the problems and development of removal methods widely used in iron pentacarbonyl. Iron pentacarbonyl, a compound, is a yellow viscous liquid with the chemical formula Fe(CO)? It is highly toxic and can be used to prepare micro-nano carbonyl iron powder.