Active guard/ high-temperature sour shift catalyst
SSK-20 is a cobalt-molybdenum (CoMo)-based catalyst that is used in sour water-gas shift reactors in chemical and power-producing plants based on gasification of coal or petcoke. The SSK-20 catalyst is optimized for use in the guard and high-temperature sour shift reactors.
Combined poison protection and stable shift activity
SSK-20 is a special large-size version of Topsoe’s low-temperature sour shift catalyst, with a lower pressure drop and an excellent capacity for arsenic, iron carbonyl, and nickel carbonyl uptake. The SSK-20 catalyst is furthermore uniquely engineered to provide stable long-lasting shift activity in high-temperature applications.
Protection from dust
Low-temperature sour shift catalyst
For downstream low-temperature sour shift applications, we recommend the installation of the SSK-10 catalyst.
Conversion of COS
SSK-20 will convert carbonyl sulfide (COS) to hydrogen sulfide (H2S); however, the COS slip will be defined by the temperature at the outlet of the sour shift section, and a low COS slip is favored by low temperatures. If a very low COS slip is required, the CKA-3 COS hydrolysis catalyst can be installed downstream of the sour shift catalysts and operated at a lower temperature.