Abstract
The absorption of pure chlorine into aqueous sodium bicarbonate solutions accompanied by the desorption of carbon dioxide was studied. The absorption rates of chlorine and the desorption rates of carbon dioxide were measured at 25°C using a baffled agitated vessel operated batchwise. The experimental results were analyzed by using the chemical absorption theory based on the Lévêque model. The absorption and desorption rates measured with sodium bicarbonate solutions of concentrations below 502 mol/m3 were in good agreement with theoretical predictions. However, the results obtained with 1020 mol/m3 sodium bicarbonate solution deviated upward from the theoretical lines. This deviation may be due to the generation of gas bubbles and subsequent turbulence in the liquid phase.
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