Catalytic effect of metal oxides on CO2 absorption in an aqueous potassium salt of lysine

Add time:08/05/2019    Source:sciencedirect.com

We report the catalytic effects of metal oxides on the CO2 absorption rate in an aqueous potassium salt of l-lysine-HCl using the vapor liquid equilibrium method. The best CO2 absorption rate obtained through testing metal oxides in a highly concentrated potassium salt of amino acids (2.0 M) was identified using CuO. The recyclability of the metal oxides was tested over three cycles. The catalyst CuO was found to enhance the absorption rate of CO2 by 61%. A possible mechanism was proposed based on NMR spectroscopy studies. Further, the effect of change in liquid absorbent viscosity on CO2 absorption is discussed.

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