Influence of liquid temperature on mass transfer coefficient

https://doi.org/10.1039/C7RA01352C

“Another other key parameter is liquid temperature, which can have an effect on K_GCO2a_V, the reaction kinetic, and equilibrium solubility. According to the Arrhenius equation,⁸⁸ the reaction kinetic constant for the reaction between CO₂ and an amine solution is temperature dependent, and by increasing the temperature a higher reaction rate constant is achieved.⁸⁹ Consequently, the enhancement factor can be increased and consequently, K_GCO2a_V can be increased as well.⁹⁰ Under absorption conditions, this effect can be reversed at higher temperatures when the reaction between CO₂ and amines becomes reversible (it approaches desorption conditions), and it can decrease K_GCO2a_V. In addition, the higher temperature can lead to an increase in the vapor pressure of CO₂ above the amine solution’s and this can cause an increase in the Henry’s law solubility constant; as result, a decrease of K_GCO2a_V and the solubility of CO₂ in amine solutions can occur.⁹¹ The balance between the above-mentioned parameters should be considered for increasing K_GCO2a_V.”