Influence of absorption pressure on mass transfer coefficient

https://doi.org/10.1039/C7RA01352C

“Increase of pressure in an absorber column can lead to a decrease of CO₂ concentration in equilibrium with the amine solution and, as a result, the driving force for mass transfer can increase. Halim, et al.⁸⁰ showed that the absorption of CO₂ (from natural gas) in an AMP–PZ solution under a pressure range of 20–40 bar increased K_GCO2a_V. However, the increasing absorber pressure in CO₂ capture post-combustion processes will increase the cost of operation.⁹² Increasing K_GCO2a_V in CO₂ capture post-combustion processes by increasing pressure is not cost-effective.”