Off-gas processing | Claus tail gas treatment

Maximizing sulfur recovery from off-gases is extremely important in today’s oil and gas industry. Regulations tend to get tighter, forcing operators to constantly optimize the efficiency of their sulfur management units. Adding a tail gas treater to your Claus unit will enable you to meet the most stringent emission targets for final sulfur removal from refinery off-gases.

The feed for the tail gas unit consists mainly of nitrogen and water; however, it also contains compounds, such as SX, SO₂, COS, CS₂, CO H₂S, and H₂, which need further treatment. In a Claus tail gas treating unit, these compounds are hydrotreated and hydrolyzed to H₂S and CO₂. The H₂S is recycled for conversion in the Claus unit, allowing for overall maximum sulfur recovery. Topsoe offers a range of tail gas treatment catalysts that allow you to reach sulfur recoveries of 99.9%

The sulfur compounds from the Claus tail gas unit can also be converted to concentrated sulfuric acid using a wet gas sulfuric acid (WSA) process.

Catalysts

TK-220 | Catalysts | Products | Topsoe

TK-220 is a CoMo catalyst that is specifically developed for treating tail gases derived from Claus ...

TK-222 | Catalysts | Products | Topsoe

TK-222 is a CoMo catalyst specifically developed for treating tail gases derived from Claus or ...

TK-224 | Catalysts | Products | Topsoe

TK-224 is a CoMo catalyst that is specifically developed for treating tail gases derived from Claus ...

Process licensing

Revamping hydroprocessing units | Process licensing | Products | Topsoe

The Topsoe Approach There are many good business reasons for considering revamping a ...

Applications within this area

Amine regeneration

H2S in refinery recycle and off-gasses is removed from the process by absorption in amine absorbers. Sour refinery off-gasses contain large amounts of H2S.

Fuel gas hydrotreating

Topsoe’s customized catalytic solution to clean up refinery fuel gas is the only offering of its kind and is commercially proven to improve refinery operations.

Sour water stripping

Topsoe's technology helps you to remove the sulfur compounds and ammonia impurities from your derived sour water before you reuse it in the refinery or discharge it.

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