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Refineries and gas plants worldwide have reported lower operating costs, extended cycle lengths and reduced pressure drops as a result of installing Criterion’s state-of the art catalysts in their Claus tail-gas treating units.

Well-operated Claus tail-gas units are increasingly important as operators strive to meet their sulphur emissions mandates. Although these processes can provide greater than 99.9% sulphur recovery, careful selection of the catalyst is necessary to ensure optimum performance and process economics.

Criterion offers a range of tail-gas treating catalysts and works with customers to select the most appropriate candidate for each individual unit. We also help customers to optimise treatment processes in terms of the hardware involved and the conditions in the unit.

Criterion’s C-234, C-534 and C-734 Claus tail-gas treating catalysts account for 80% of the world’s installed capacity. They are installed in over 270 reactors worldwide, including nearly all of the industry’s largest units.

Product Information - Tailgas Treating

Product Information - Tailgas Treating

Catalyst Applications Description
099 Catalytic Incineration Used for the low temperature oxidation of the sulphur compounds in Claus tail gas and tail gas processes selectively to SO2.
234 Claus Tail Gas Low temperature and low density TRILOBE catalyst used for the reduction and hydrolysis of the sulphur compounds in Claus tail gases to H2S.
534 Claus Tail Gas Higher density, very strong, lowest pressure drop spherical catalyst used for the reduction and hydrolysis of the sulphur compounds in Claus tail gases to H2S.
734 Claus Tail Gas Lowest pressure drop and lowest temperature option for the reduction and hydrolysis of the sulphur compounds in Claus tail gases.