First published in Sulphur + Sulphuric 2023 International Conference & Exhibition, November 2023
Increasingly stringent environmental legislation requires maximizing sulphur recovery yields. That explains the growing role of titania catalysts in SRUs, which is accompanied by the arrival of high-activity tail-gas treatment catalysts on the market.
Titania-based catalysts are used because they can convert efficiently all sulphur species to elemental sulphur, even under conditions that deactivate conventional alumina catalysts. Furthermore, the use of titania facilitates the conversion of COS and CS2 at low temperature, which is essential if hydrocarbons are present in the acid gas feed.
Axens’ titania-based catalyst, CRS 31, has extensive commercial experience with thousands of tons loaded worldwide, and is considered to be the benchmark titania catalyst.
