wet sulfuric acid process (WSA process) Info chemical Man

The wet sulfuric acid process (WSA process) is one of the key gas desulfurization processes on the market today. Since the Danish catalyst company Haldor Topsoe introduced and patented this technology in the late 1980s, it has been recognised as an efficient process for recovering sulfur from various process gasses in the form of commercial quality sulfuric acid (H2SO4), with simultaneous production of high pressure steam. The WSA process is applied in all industries where removal of sulfur is an issue.

The wet catalysis process is especially suited for processing one or more sulfur containing streams such as.:

    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 desulfurisation
    Metallurgical process gas
    Production of sulfuric acid

Industrial applications

Industries where WSA process plants are installed:

Refinery and petrochemical industry
    Metallurgy industry
    Coal-based industry (coking and gasification)
    Power industry
    Viscose industry
    Sulfuric acid industry