Sulfur release issue in medium-temperature shift catalysts for hydrogen production via steam hydrocarbon thermal conversion

Is there no one? Isn’t there not many people on the forum anymore?

In natural gas-based hydrogen production plants, the medium-temperature shift catalyst undergoes a sulfur release process only during its initial operation; this sulfur is generated as a result of the catalyst’s production process. The main component of such catalysts is iron, and due to cost considerations on the part of manufacturers, iron ore is used in their production, which is why these catalysts contain sulfur. In most reduction processes for medium-temperature catalysts, natural gas conversion gas is used, that is, the hydrogen/carbon monoxide reduction method. During reduction, sulfur present in the catalyst reacts with hydrogen to form hydrogen sulfide. To prevent hydrogen sulfide from affecting subsequent processes, the gas exiting the conversion furnace during this reduction process must be discharged; this is the sulfur removal process. Different catalyst manufacturers have varying requirements regarding the sulfur release temperature; when reducing the catalyst, it is possible to request from the manufacturer a reduction plan as well as a sulfur release plan. The requirements for the shifted gas in subsequent processes also differ, and the degree of sulfur release can be determined by consulting the manufacturer of those subsequent processes.

During the production of medium-temperature catalysts, FeSO4 reacts with hydrogen during the reduction process to produce H2S

Sulfur is added because some sulfides are present during the manufacturing process; however, as catalyst production techniques have improved, there is very little sulfur left in the catalysts now. The temperature increase of the medium-temperature catalyst is the sulfur release process. OP, which brand of catalyst do you use? Ours is Liu Hua’s