Also known as: hydrogen sulfide
H2S is a gas generated from the processing of crude oil or natural gas that contains sulfur. It is generated by conversion units cracking feedstock containing sulfur and from hydrotreaters that specifically focus on removing sulfur by creating H2S.
H2S is highly toxic and generates highly polluting sulfur oxides if burned. Consequently, almost all H2S is extracted in the amine unit and sent to the sulfur plant for conversion into solid elemental sulfur.