Abstract

Abstract A parametric study of CO 2 absorption into aqueous solutions of monoethanolamine (MEA)-2-amino-2-methyl-1-propanol (AMP) blends was conducted to obtain a much-needed mass transfer data for process design. It was found that the overall mass transfer coefficient (K G a e ) generally increases with liquid flow rate, temperature and total amine concentration (except at high CO 2 loading of above 0.35 mol/mol). It however decreases with CO 2 partial pressure and CO 2 loading. Higher MEA concentration in the MEA-AMP blends causes K G a e to increase, but this trend reverses at high CO 2 loadings. An empirical correlation of K G a e was subsequently developed as a function of process parameters.

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