WANG Yuantao, FANG Chenggang, ZHANG Feng, et al. Performance of CO2 absorption in mixed aqueous solution of MDEA and amino acid ionic liquids[J]. CIESC Journal, 2009, (11): 2781-2786.
WANG Yuantao, FANG Chenggang, ZHANG Feng, et al. Performance of CO2 absorption in mixed aqueous solution of MDEA and amino acid ionic liquids[J]. CIESC Journal, 2009, (11): 2781-2786.DOI:
To enhance CO2 absorption in aqueous solution of N-methyldiethanolamine (MDEA)
four kinds of ionic liquid—tetramethylammonium glycin([N1111][Gly])
tetraethylammonium glycin([N2222][Gly])
tetramethylammonium lysine([N1111][Lys]) and tetraethylammonium lysine([N2222][Lys])were synthesized and added in MDEA aqueous solution as activator. The performance of CO2 absorption of the mixed solutions at total mass fraction 30% were tested by the constant volume method
and the proton transfer mechanism in promoting CO2 absorption was also analyzed. The results indicated that these ionic liquids could greatly enhance the absorption
and the absorption rate increased with increasing concentration of ionic liquid. The mixed absorbents with lysine were of high absorption loads
and the initial absorption rate of [N1111][Gly]-MDEA aqueous solution was higher than the others used in this work. Moreover
the regeneration efficiency of the mixed solution with added [N1111][Gly]was 98%