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    Claus tail gas treatment

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    Tail gas treating solutions for maximum sulfur recovery

    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 for off-gas processing

    TK-220 catalyst

    TK-220 catalyst

    TK-220 is a CoMo catalyst that is specifically developed for treating tail gases derived from Claus or other similar units.
    TK-222 catalyst

    TK-222 catalyst

    TK-222 is a cobalt molybdenum (CoMo) catalyst specifically developed for treating tail gases derived from Claus or other similar units.
    TK-224 catalyst

    TK-224 catalyst

    TK-224 is a cobalt molybdenum (CoMo) catalyst that is specifically developed for treating tail gases derived from Claus or other similar units.

    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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