Wet sulfuric acid process

The wet sulfuric acid process (WSA process) is a gas desulfurization process. After Danish company Haldor Topsoe introduced this technology in 1987, it has been recognized as a process for recovering sulfur from various process gases in the form of commercial quality sulfuric acid (H₂SO₄) with the simultaneous production of high-pressure steam. The WSA process can be applied in all industries where sulfur removal presents an issue.

The wet catalysis process is used for processing sulfur-containing streams, such as:^[1]

H₂S gas from e.g. amine gas treating unit
Off-gas from sour water stripper (SWS) gas
Off-gas from Rectisol
Spent acid from an alkylation unit
Claus process tail gas
Heavy residue or petcoke-fired utility boiler off-gas
Boiler flue gases from various processes SNOX flue gas desulfurization
Metallurgical process gas
Production of sulfuric acid

^ Gary, J.H. & Handwerk, G.E. (1984). Petroleum Refining Technology and Economics (2nd ed.). Marcel Dekker, Inc. ISBN 0-8247-7150-8.

[Gary-1] Gary, J.H. & Handwerk, G.E. (1984). Petroleum Refining Technology and Economics (2nd ed.). Marcel Dekker, Inc. ISBN 0-8247-7150-8.

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