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 has expanded to provide a complementary portfolio of SRU catalyst solutions. Criterion has augmented its portfolio in collaboration with Euro Support to offer Claus and Titania catalysts, presenting the best combined value on the market. Our TGU & SRU combined solutions cut costs, increase performance and extend cycle lengths. We pride ourselves on extended customer service and collaboration to build solutions because performance matters.

Criterion’s C-234, C-534 and C-834 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 - Tail-gas 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.
834 Claus Tail Gas High activity lowest temperature catalyst with low pressure drop, operated in TGU reactors at RIT less than 220°C (428°F).

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