A MODEL FOR DISSOLUTION OF CARBON DIOXIDE GAS IN HIGH PH SOLUTION BASED ON CHEMICAL KINETICS

Abstract

  A model for dissolution rate of CO₂ gas in high pH solution based on chemical kinetics is presented in this paper. The numerical analysis values using the dissolution rate model generally correspond to experimental results for dissolution tests of CO₂ gas in simulated pore solution containing NaOH and Ca(OH)₂. On the other hand, comparison between the dissolution rate model and an equiribrium model based on the assumption that the dissolution of CO₂ in solution immediately come to equilibrium state was carried out. As a result, it was shown that the rate-controlling factor of CO₂ dissolution process in atmosphere containing 0.06% CO₂ gas was not the diffusion rate of CO₂ in the solution but the dissolution rate of CO₂ into the solution.