Sulfuric acid
Produce directly from spent acid, elemental sulfur or sulfur compound containing gases
Whether you produce sulfuric acid from elemental sulfur or from SO2 regenerate spent sulfuric acid or clean sulfurous gases, we have the optimal solution. Our high activity catalysts provide high conversion, high energy efficiency, low-pressure drop, production stability, as well as an exceptionally long life in any sulfuric acid plant. They ensure that our customers achieve higher production rates, improved heat recovery, fast start-up, optimal energy efficiency and the lowest possible SO2 emissions. Our Wet gas Sulfuric Acid (WSA) technology converts sulfurous gases to commercial-grade sulfuric acid without drying the gas, with a high energy efficiency and very low emissions.
Technical service
Based on experience over more than half a century, Topsoe has established an extensive technical service programme available to our VK catalyst users. In addition to frequent contact, the service programme includes activity testing of catalyst samples, evaluations of catalyst performance, plant optimization, troubleshooting and management of catalyst replacement.
Activity testing of catalyst samples represents a valuable source of information, which combined with data evaluations of the plant performance enables Topsoe to optimize future catalyst management.
Related Downloads

A new catalyst helps balance sulfuric acid costs and emissions to tip the scales in the operator’s favor.
VK38+ is a new potassium-promoted catalyst from Topsoe that has been proven to have higher activity than any other catalyst, regardless of which converter bed it is used in. Through its higher activity, VK38+ brings with it the potential for enhanced performance, higher efficiency and a reduced climate footprint.
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Tip the scales - get more from your sulfuric acid catalyst expenses with VK38+ .
Selecting the right catalysts for a SO2 converter has always been about balancing expenses and gains. The new VK38+ helps create that balance – and more.
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