Acta Phys. -Chim. Sin. ›› 1992, Vol. 8 ›› Issue (06): 753-759.doi: 10.3866/PKU.WHXB19920608

• ARTICLE • Previous Articles     Next Articles

Catalytic Activity of Vanadium Pentoxide for the Absorption of Carbon Dioxide by Potassium Carbonate Solution

Le Qing-Hua; Xu Jin-Lin; Shi Ya-Jun   

  1. Institute of Chemical Engineering, East China University of Chemical Technology, Shanghai 200237
  • Received:1991-06-05 Revised:1991-12-28 Published:1992-12-15
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Abstract: The chemical mechanism that vanadium pentoxide, as an additive, enhances the absorption rate of carbon dioxide in aqueous potassium carbonate solution has been suggested.
Experiments proved that V_2O_5 exists as V_2O_7~(4-) and V_4O_(12)~(4-) in the carbonate solution, as pH value is in the range of 9—12. The catalytic action of V_2O_5 is only related to the concentration of V_2O_7~(4-) and pH value of the solution, the optimum range of pH value is 10.6 to 10.8, and the quantity of V_2O_5 added has to be restricted in order to maintain the optimized pH range.

Key words: Vanadic oxide, Carbon dioxide, Potassium carbonate, Absorption, Catalytic mechanism