Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

The kinetics of the title process is approximated by differential equations based on kinetic and equilibrium data for carbon dioxide. The course of pH after a sudden change of the concentration of CO₂ in the gas is calculated by numerical integration. The course of pH during absorption of CO₂ is different from that during desorption. The course of pH during desorption calculated on the assumption that the rate of the noncatalysed hydration of CO₂ is sufficient to ensure chemical equilibrium is in good agreement with experimental data from the literature. During absorption of CO₂ in a solution of hydrogen carbonate, the chemical reaction rate is sometimes insufficient to ensure chemical equilibrium prior to pH measurement.