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Reduction of SO2 to elemental sulfur over rare earth-iron catalysts

Reduction of SO2 to elemental sulfur over rare earth-iron catalysts
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摘要 With coal gas as a reducing agent, the catalytic reduction of SO2 to sulfur in the flue gas produced in metallurgical processes was studied over catalysts of rare earth-Fe/Al2O3 (REFe/Al2O3). The catalytic activity of the REFe/Al2O3 catalyst on the reduction of SO2 to sul-fur was investigated based on kinds and the contents of rare earths and different preparation method of the catalyst. Additionally, the mecha-nism of this catalytic reduction reaction was also explored. Results showed that different rare earth imposed different effect on the activity of the Fe/Al2O3 catalyst. Especially, the addition of Sm and Dy greatly improved the catalytic activity of Fe/Al2O3. The yield of sulfur over SmFe/Al2O3was increased to 86.62% at 360 ℃, which was 40.5% higher than that over Fe/Al2O3at the same temperature; and the sulfur yield over DyFe/Al2O3was increased to 91.62% at 400 ℃, 26.4% higher than that over Fe/Al2O3. The catalytic activity of REFe/Al2O3 was somehow dependent on the content of rare earth. For SmFe/Al2O3, the content of Sm was optimized to be about 1.0 wt.%. The rare earth catalyst prepared with different methods also showed varied activity. The sulfur yield over rare-earth transition metal catalysts follows the order: Sm and iron solution mixing impregnationSm first, then iron solution impregnationiron first, then Sm solution impregnation. The reaction mechanism of SO2 reduction to sulfur with coal gas was proposed to be an intermediate mechanism.
出处 《Journal of Rare Earths》 SCIE EI CAS CSCD 2009年第5期744-748,共5页 稀土学报(英文版)
基金 Project supported by the International Scientific and Technological Cooperation Foundation (2005DFBA0006)
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参考文献10

  • 1Zheng Shili,Yang Qingsong,Zhang Hongwen,Chen Zhong,Liang Gang,Yue Wei.The thermodynamic equilibrium verify for carbothermal reduction of sulfur dioxide[].Environmental Chemistry.1997
  • 2Zhang Liming,Qi Xiaozhou,Qing Yongning,Song Jian.The effect of carrier on the catalytic property of nickel-based catalyst for reducing sulfur dioxide to elemental sulfur by ammo-nia[].Journal of Environmental Science.2000
  • 3Hu Hui,Li Jing,Cheng Guohong,Li Shengli.Study on cata-lytic reduction of SO2over mixture of rare earth CeO2-La2O3 catalysts[].Journal of the Chinese Rare Earth Society.2004
  • 4Tu Baofeng,Cheng Mojie,Dong yonglai.Rare-earth modified solid oxide fuel cell anode catalyst preparation and characteri-zation of materials[].Journal of the Chinese Rare Earth Society.2008
  • 5Liu W,Sarofim A F,Stephanopoulos M F.Reduction of SO2 by CO to Elemental Sulfur over Composite Oxide Catalysts[].Applied Catalysis B Environmental.1994
  • 6Kaspar J,Fornasiero P,Graziani M.-based oxides in the three-way catalysis[].Catalysis Today.1999
  • 7Paik SC,Chung JS.Selective hydrogenation of SO2 to elemental sulfur over transition metal sulfides supported on Al2 O3[].Applied Catalysis.1996
  • 8Paik S C,Chung J S.Selective Catalytic Reduction of SO2 with Hydrogen to Elemental Sulfur over Co-Mo/Al2O3[].Applied Catalysis B Environmental.1995
  • 9Ma J X,Fang M,Lau N T.On the synergism between La2O2 S and CoS2 in the reduction of SO2 by CO[].Journal of Catalysis.1996
  • 10Sarlis J,Berk D.Reduction S O2 by C H4 over Transition Oxide Catalysts[].Chem Eng Com m on.1996

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