Sulfur Recovery

Atmospheric emission regulations have been tightened to specifications of less than 150 mg of SO₂/Nm³, while gas fields are being developed with increasingly high levels of H₂S. The H₂S present in acid gas streams can be valorized by oxidation to elemental sulfur through Sulfur Recovery Unit. In turn, elemental Sulfur is used in the fertilizer and rubber industries, and for the extraction of some metals (copper, nickel, uranium), mainly via its intermediate conversion into Sulfuric Acid (H₂SO₄).


Axens Offer

AdvaSulf™ portfolio provides reliable, flexible and low-cost solutions for Sulfur Recovery to meet the most stringent environmental standards, at minimized capital and operating costs. The portfolio covers a complete range of processes for any applications: gas plants, refineries, upgraders, biogas, shale gas, etc., in a wide range of single train capacities, from a few tons per day to more than 2,200 tons per day of sulfur produced.

When Sulfur Block is required, Axens has the internal knowhow to include in the Process Design Package (PDP) the following additional units: Sour Water Stripper (SWS), Amine Regeneration Unit (ARU) and Acid Gas Enrichment (AGE). In addition, the sulfur block can be completed by developing a duty specification for the sulfur forming unit.

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Clément Salais
Associate Manager, Gas Business Group

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