Topsoe’s Wet gas sulphuric acid technology (WSA) recovers sulphur from off-gases and produces commercial-grade concentrated sulphuric acid. It is also used to regenerate spent sulphuric acid and to produce sulphuric acid from elemental sulphur.
Meeting clients' requirements
The WSA technology fulfills clients’ requirements for compliance with sulphur emission standards
- producing no undesired by-products
- efficient heat recovery
- flexibility and simplicity
- low capital and operating expenses
Topsoe designs the WSA plant to meet each client's specific needs. The projects are defined and executed in close collaboration with the clients and their contractors.
The WSA technology uses Topsoe's unique VK-W series of catalysts.
Market experience
The WSA technology is backed by more than 25 years of commercial experience and has proven its value in industries like oil refining, metallurgy, petrochemicals, coking, coal gasification, and viscose fibres. The WSA plant capacities range from 2,600 to 1,200,000 Nm3/h (100 to 45,000 MSCFH) process gas and up to 1140 MTPD (1250 STPD) sulphuric acid.
More than 100 WSA plants have been licensed since 1980.