Abstract The trying to propose the novel catalysts to increase the Claus reactions in order to remove the SO 2 and H 2 S with high performances is very important. Here, the capacities of metal doped nanostructures as catalysts for SO 2 hydro-desulfurization to produce the H 2 S are examined. The possible mechanisms and reactions pathways for SO 2 hydro-desulfurization to H 2 S production on Mn doped nanostructures are investigated. The important species for SO 2 hydro-desulfurization are adsorbed on Mn atoms of nanostructures. The H 2 S molecule is generated on Mn doped nanostructures through following reaction steps: SO 2 * → SO* → S* → SH* → H 2 S. The H 2 S is desorbed from surfaces of metal doped nanostructures, easily. The final performances of used catalysts for SO 2 hydro-desulfurization to H 2 S production are changed in this order: Mn-SiNT(7, 0) > Mn-BPNT(7, 0) > Mn-CNT(7, 0) > Mn-Si 60 > Mn-B 30 P 30 > Mn-C 60 . Finally, the Mn-SiNT(7, 0), Mn-CNT(7, 0) and Mn-BPNT(7, 0) as catalysts have effective ability for SO 2 hydro-desulfurization to H 2 S production from thermodynamic view point.
Sead et al. (Thu,) studied this question.