SO2 hydro-desulfurization to H2S production on metal doped nanotubes and nanocages (Mn-Si60, Mn-C60, Mn-B30P30, Mn-SiNT(7, 0), Mn-CNT(7, 0) and Mn-BPNT(7, 0))

Abstract The trying to propose the novel catalysts to increase the Claus reactions in order to remove the SO2 and H2S with high performances is very important. Here, the capacities of metal doped nanostructures as catalysts for SO2 hydro-desulfurization to produce the H2S are examined. The possible mechanisms and reactions pathways for SO2 hydro-desulfurization to H2S production on Mn doped nanostructures are investigated. The important species for SO2 hydro-desulfurization are adsorbed on Mn atoms of nanostructures. The H2S molecule is generated on Mn doped nanostructures through following reaction steps: SO2* → SO* → S* → SH* → H2S. The H2S is desorbed from surfaces of metal doped nanostructures, easily. The final performances of used catalysts for SO2 hydro-desulfurization to H2S production are changed in this order: Mn-SiNT(7, 0) > Mn-BPNT(7, 0) > Mn-CNT(7, 0) > Mn-Si60 > Mn-B30P30 > Mn-C60. Finally, the Mn-SiNT(7, 0), Mn-CNT(7, 0) and Mn-BPNT(7, 0) as catalysts have effective ability for SO2 hydro-desulfurization to H2S production from thermodynamic view point.