Phase separation characteristics in biphasic solvents based on mutually miscible amines for energy efficient CO2 capture View Full Text


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Article Info

DATE

2017-06

AUTHORS

Jun Lee, Yeon Ki Hong, Jong Kyun You

ABSTRACT

One of the challenges with regard to the aqueous amine-based CO2 capture process is the considerable energy requirement for solvent regeneration. To overcome this challenge, a biphasic solvent was employed in this study. Here, the phase separation behavior of amine blends depending on the characteristic structures of the solvent component was investigated using a turbidity measurement apparatus. Amines were classified as (1) primary/secondary amines or tertiary/sterically hindered amines depending on the CO2 reaction species, such as carbamate and bicarbonate (2) alkyl and alkanolamines, depending on the presence of a hydroxyl group, (3) chain and cyclic amines, and (4) mono- and polyamines depending on the molecular structure. Easy phase separation occurred in solvent blends containing polyamines such as DETA (diethylenetriamine), TETA (triethylenetetramine), and DEEA (2-(diethylamino) ethanol). The types with the greatest potential were the DETA/DEEA blended solvents. A phase separation could be determined based on the difference in the reaction rate with CO2 and the low solubility between the carbamate species of DETA and DEEA. More... »

PAGES

1840-1845

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11814-017-0067-4

DOI

http://dx.doi.org/10.1007/s11814-017-0067-4

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1084982150


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