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Citation: Yin Hengbo, Dou Bosheng, Xie Xiaofan, Sun Guifen. ADSORPTION AND DISTRIBUTION OF Co,Mo ON Al₂O₃ AND K ON Co-Mo CATALYST[J]. Chinese Journal of Applied Chemistry, ;1990, 7(1): 19-22. shu

ADSORPTION AND DISTRIBUTION OF Co,Mo ON Al₂O₃ AND K ON Co-Mo CATALYST

1.
Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022

Received Date: 28 February 1989
Available Online: 19 May 1989
Fund Project:

Co²⁺ ion has the adsorption rate smaller than that of molybdate ion on γ-Al₂O₃ but with larger apparent diffution coefficient (D_co=1.2×10^-5, D_Mo=4.4×10^-6cm²/s at 25℃).The adsorption curves of Co and Mo consist with Langmuir and Freundlich isotherm,respectively. Adsorption of Mo decreased by increasing the pH of impregnating solution and adsorptions of Co and Mo were mutually enhanced due to coadsorption in a mixed solution of cobalt nitrate and ammonium heptamolybdate at pH=5.3.Most of Mo was distributed in the outter shell of Al₂O₃ in the catalyst prepared by pore volume imrpeg-nating with Co-Mo mixed solution at low pH value owing to its large adsorytivity, but a more uniform distribution could be obtained at high pH solution. Adsorption of K₂CO₃ on Co-Mo catalyst can be described by Langmuir isotberm. An even distribution of K on Co-Mo/Al₂O₃ was obtained by pore volume impregnating with enough quantity of K₂CO₃ in the impregnating solution. An even distributed catalyst is more active than an uneven distributed one with the same composition for water gas shift reaction.
- cobalt molybdenum catalyst,
- cobalt molybdenum potassium catalyst,
- water gas shift catalyst
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ADSORPTION AND DISTRIBUTION OF Co,Mo ON Al2O3 AND K ON Co-Mo CATALYST

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ADSORPTION AND DISTRIBUTION OF Co,Mo ON Al₂O₃ AND K ON Co-Mo CATALYST