Amine regeneration

Value-adding custom solutions for your business

Sour refinery off-gasses contain hydrogen sulfide (H₂S). H₂S poses a danger to human health and is harmful to the environment.

Topsoe customizes amine regeneration units that absorb and eliminate the risk of these off-gasses.

When hydroprocessing units convert organic sulfur compounds into H₂S, the H₂S ends up in the sour off-gas for removal by absorption in an amine scrubber. The result is H₂S enriched amine, which is pumped to the top of the amine regenerator column. Here, it is counter-currently contacted with hot vapor from the amine regenerator reboiler at the bottom of the column. The H₂S is then stripped off and recovered from the top of the column, while lean amine with equilibrium amounts of H₂S is recovered from the bottom. Reflux water is fed into the top of the column to absorb any amine carry-over in the rectification section. Topsoe amine regeneration prevents amine losses into the overhead and effectively removes all H₂S.

Topsoe works closely with customers to purpose-design amine regeneration units to fit their operational goals.