CO2 absorption and desorption in an aqueous solution of heavily hindered alkanolamine: Structural elucidation of CO2-containing species

Young Seop Choi, Jinkyu Im, Jun Kyo Jeong, Sung Yun Hong, Ho Gyeom Jang, Minserk Cheong, Je Seung Lee, Hoon Sik Kim

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The pathways for the CO2 absorption and desorption in an aqueous solution of a heavily hindered alkanolamine, 2-(t-butylamino)ethanol (TBAE) were elucidated by X-ray crystallographic and 13C NMR spectroscopic analysis. In the early stage of the CO2 absorption, the formation of carbonate species ([TBAEH]2CO3) was predominant, along with the generation of small amounts of zwitterionic species. With the progress of the absorption, the carbonate species was rapidly transformed into bicarbonate species ([TBAEH]HCO3), and the amounts of the zwitterionic species increased gradually. During desorption at elevated temperature in the absence of CO2, [TBAEH]HCO3 was found to transform into [TBAEH]2CO3, where CO3 2- strongly interacts with two [TBAEH]+ via hydrogen bondings.

Original languageEnglish
Pages (from-to)4163-4170
Number of pages8
JournalEnvironmental Science and Technology
Volume48
Issue number7
DOIs
Publication statusPublished - 2014 Apr 1

Fingerprint

Alkanolamines
Carbonates
Desorption
desorption
aqueous solution
Spectroscopic analysis
Bicarbonates
Hydrogen bonds
Ethanol
Nuclear magnetic resonance
Hydrogen Bonding
X rays
carbonate
X-Rays
Temperature
bicarbonate
nuclear magnetic resonance
ethanol
transform
hydrogen

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

CO2 absorption and desorption in an aqueous solution of heavily hindered alkanolamine : Structural elucidation of CO2-containing species. / Choi, Young Seop; Im, Jinkyu; Jeong, Jun Kyo; Hong, Sung Yun; Jang, Ho Gyeom; Cheong, Minserk; Lee, Je Seung; Kim, Hoon Sik.

In: Environmental Science and Technology, Vol. 48, No. 7, 01.04.2014, p. 4163-4170.

Research output: Contribution to journalArticle

Choi, Young Seop ; Im, Jinkyu ; Jeong, Jun Kyo ; Hong, Sung Yun ; Jang, Ho Gyeom ; Cheong, Minserk ; Lee, Je Seung ; Kim, Hoon Sik. / CO2 absorption and desorption in an aqueous solution of heavily hindered alkanolamine : Structural elucidation of CO2-containing species. In: Environmental Science and Technology. 2014 ; Vol. 48, No. 7. pp. 4163-4170.
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