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Effect of 1‐Methylimidazole on CO 2 Absorption by Diethylenetriamine Aqueous Solutions
Author(s) -
You Jong Kyun,
Lee Hwa Young,
Hong Yeon Ki
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201700150
Subject(s) - diethylenetriamine , absorption (acoustics) , aqueous solution , phase (matter) , solubility , chemistry , aqueous two phase system , inorganic chemistry , analytical chemistry (journal) , materials science , chromatography , organic chemistry , composite material
Phase‐splitting absorbents represent a promising technology in relation to the low energy levels required during the CO 2 capture process. 1‐Methylimidazole was added to a diethylenetriamine (DETA) aqueous solution for high CO 2 loading via phase splitting of absorbents during CO 2 absorption. Phase splitting was observed during the absorption process when the CO 2 loading reached a value suitable for the mixture of DETA, 1‐methylimidazole, and water. The distribution of individual components in each phase was determined according to the total organic carbon and gas chromatography. DETA and CO 2 were concentrated in the bottom phase, 1‐methylimidazole mostly in the top phase. Phase splitting during CO 2 absorption was mainly due to the solubility limitation of DETA carbamate into 1‐methylimidazole.