Regeneration of MnO/γ-Al2O3 used for high-temperature desulfurization of fuel gases

Abstract

Abstract The regeneration of MnO/γ-Al 2 O 3 used as a sorbent to remove H 2 S from fuel gases was studied with a packed bed reactor. The sorbent was prepared by wet method in which MnO was impregnated onto a standard γ-Al 2 O 3 . The sorbent was regenerated at 600°C. The regenerating gas was a mixture of N 2 , H 2 and steam in various proportions. The N 2 -H 2 -steam mixture resulted in a complete regeneration of the sorbent. The composition of the reactor off-gas varied according to the regenerating gas composition. Under suitable conditions the concentration of H 2 S in the reactor off-gas was high enough for use to produce elemental sulfur.