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Citation: Kang Huimin, Wang Daxiang, Zhang Liu. Dispersion of Cobalt and Molybdenum on Phosphorus or Potassium Modified γ-Al₂O₃ Support[J]. Chinese Journal of Applied Chemistry, ;1997, 14(1): 37-40. shu

Dispersion of Cobalt and Molybdenum on Phosphorus or Potassium Modified γ-Al₂O₃ Support

1.
Department of Chemical Engineering, Tianjin University, Tianjin 300072

Received Date: 4 April 1996
Available Online: 7 October 1996

The dispersion of Co and Mo on phosphorus and potassium modified V-Al₂O₃ was investigated by X-ray diffraction, BET surface areas and magnetic susceptibility analysis. It was found that molybdenum can no longer reach a single-layered dispersion as it does on V-Al₂O₃ support, but forms large crystallite of MoO₃ on the H₃PO₄ treated V-Al₂O₃ support. While, cobalt oxide is highly dispersed with the help of phosphorus treatment. The resulting surface cobalt compound was recognized as staying in the tetrahedral coordination state. A AlPO₄-like surface compound on the phosphorus modified V-Al₂O₃ was supposed and the influence of phosphorus on the dispersion of Co and Mo was explained accordingly. Effects of potassium on the dispersion of Co and Mo were also reported and discussed here in.
- V-Al₂O₃,
- Co Mo based catalyst,
- dispersion
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Dispersion of Cobalt and Molybdenum on Phosphorus or Potassium Modified γ-Al₂O₃ Support