Refined desulfurization
Thread Content
Why is sulfur removed after the sulfidation of iron-molybdenum catalysts??? I would appreciate some guidance, thank you
During the sulfidation process, the catalyst is sulfided using high-sulfur gas or carbon disulfide; in either case, the sulfur content is relatively high. The purpose of releasing sulfur is to ensure that the catalyst is fully sulfidized, and to remove the sulfur-containing gases that have not been absorbed by the catalyst, thereby reducing the sulfur content at the outlet of the desulfurization process
If sulfur is not removed, trace amounts of sulfur will be carried into subsequent stages, posing a threat to the operation of other catalysts.
During the sulfidation of the catalyst, some sulfur does not participate in the reaction; this sulfur must be removed, otherwise it will interfere with the proper operation of subsequent processes and can poison other catalysts. It is necessary to keep the sulfur content in the gas at less than 0.1 ppm