An Updated Examination of Gas Sweetening by the Iron Sponge Process

A detailed evaluation of gas sweetening via iron sponge (hydrated iron oxide) has been undertaken due to the apparent lack of comprehensive engineering, research, and field data related to this process. Key areas reviewed include composition of the sweetening media, unit design considerations, and operational parameters. The investigations discussed in this paper provide quantifiable proof that the iron sponge process continues to be a viable alternative for hydrogen sulfide and mercaptan removal, provided the sweetening equipment is properly designed and operated.