Abstract
In the current research, to form elemental sulfur, catalytic reduction of sulfur dioxide with methane over Ni–Al2O3 catalysts was studied. By adding nickel as a promoter, the performance of catalyst was enhanced considerably. It was found that Al2O3–Ni (10%) catalyst had the best performance among all the catalysts studied. The addition of more than 10% Ni had no beneficial effect. The reaction was tested at temperature range of 550–800 °C, at the atmospheric pressure, and it was observed that complete conversion and selectivity (more than 99.5%) was achieved by Al2O3–Ni(10%) catalyst at 750 °C. Between molar feed ratio of SO2/CH4 = 1–3, the highest conversion to elemental sulfur combined with low production of H2S and COS, as the undesirable side products, was obtained when molar ratio was equal to 2 (the stoichiometric ratio). Also, the best catalyst showed good long-term stability for SO2 reduction with methane.
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Mousavi, S.E., Pahlavanzadeh, H., Khani, M. et al. Selective catalytic reduction of SO2 with methane for recovery of elemental sulfur over nickel-alumina catalysts. Reac Kinet Mech Cat 124, 669–682 (2018). https://doi.org/10.1007/s11144-018-1360-x
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DOI: https://doi.org/10.1007/s11144-018-1360-x