In this work, different CO2 gas concentrations were absorbed by MEA at various carbon loadings and the flux measured. The overall mass transfer of CO2 into MEA was evaluated by considering the relative contributions of the gas and liquid side resistances. The applicability of the pseudo-first order approximation and the instantaneous reaction were assessed for the different conditions to determine the appropriate reaction regimes. It was determined that at lean solvent conditions with low driving force (representative of conditions at the top of an absorber), mass transfer was well modeled by the pseudo-first order approximation.
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