Comparison between supported gas membrane process and supported liquid membrane process for the separation of NH3 from aqueous media containing NH3 and CO2

A comparison between the hollow fibre supported gas membrane (SGM) process and the hollow fibre supported liquid membrane (SLM) process for the separation of NH₃ from aqueous solutions containing NH₃ and CO₂ was performed. The experimental data as well as the model simulation demonstrate that the SLM process can remove NH₃ from aqueous solutions of NH₃ and CO₂ at a higher rate than the SGM process when the NH₃ loading is low or the ratio of NH₃ to CO₂ is low. This study suggests that the proper combination of the SGM process and the SLM process can strip NH₃ more effectively from aqueous solutions containing NH₃ and CO₂.