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Citation: Zhang Yuli, Xie Xiaofan, Dou Bosheng. Sulfurization and Desulfurization of Water Gas Shift Catalyst CoMOK/Al₂O₃[J]. Chinese Journal of Applied Chemistry, ;1994, 11(2): 62-66. shu

Sulfurization and Desulfurization of Water Gas Shift Catalyst CoMOK/Al₂O₃

1.
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received Date: 8 September 1993
Available Online: 22 November 1993

The sulfurization and desulfurization of water gas shift catalyst CoMoK/Al₂O₃ have been investigated by TPS and TPDS techniques,using H₂S and CS₂ as sulfurizing agents.Only H₂S consumption and H₂O formation were found when the catalyst was sulfurized with H₂S/H₂.When CS₂/H₂ was used as sulfurizing agent,CO₂ was formed at first,then CH₄,H₂O and H₂S as shown by TPS curves.Carbon deposition on the catalyst during the sulfurization with CS₂/H₂ caused lowering of the catalytic activity,but the deposifed carbon could be reduced in the run of WGS reaction.The results of TPDS indicated that N₂ does not act in desulfurization and H₂ or CO also does not give an obvious effect on the desulfurization.However,H₂O shows a strong desulfurizing effect.Oxygen caused a permanent loss of the activity in some part of the catalyst.XPS results showed that Mo⁴⁺ has been changed to Mo⁵⁺ and Mo⁶⁺ in desulfurized catalyst,decreasing its activity.
- CoMoK/Al₂O₃,
- water-gas,
- catalyst,
- sulfurization,
- desulfurization
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Sulfurization and Desulfurization of Water Gas Shift Catalyst CoMOK/Al2O3

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Sulfurization and Desulfurization of Water Gas Shift Catalyst CoMOK/Al₂O₃