API 955 · GPSA · Kohl & Nielsen
Thermal Stage: H₂S + 1.5 O₂ → SO₂ + H₂O
Catalytic: 2 H₂S + SO₂ → 3 S + 2 H₂O
Converts hydrogen sulfide to elemental sulfur. 1/3 combusted, 2/3 catalytically reacted.
Understand claus process principles, calculations, and industry applications
It designs Claus sulfur recovery units with thermal and catalytic stage calculations per industry standards.
The Claus process recovers elemental sulfur from H₂S-containing acid gas streams through thermal and catalytic reaction stages.
A Claus unit typically includes one thermal stage followed by two or three catalytic stages to maximize sulfur recovery.