Analysis of the heat of reaction and regeneration in alkanolamine-CO2 system

Seung Tae Kim, Jeong Won Kang, Jong seop Lee, Byoung Moo Min

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The estimation of regeneration heat of absorbent is important because it is a key factor that has an effect on the process efficiency. In this study, thermal stability and regeneration heat of aqueous amine solutions such as monoethanolamine (MEA), 2-amino-2-methyl-1-propanol (AMP), N-methyldiethanolamine (MDEA), and 1,8-diamino-pmenthane (KIER-C3) were investigated by using TGA-DSC analysis. The thermal characteristics of the fresh and CO2 rich amine solutions were estimated. The CO2 rich amine solutions were obtained by VLE experiments at T=40 °C. The regeneration heat of aqueous MEA solution was 76.991-66.707 kJ/mol-CO2, which is similar to heat of absorption. The reproducibility of the results was obtained. The regeneration heat of aqueous KIER-C3 20 wt% solution (1.68 M) was lower than that of aqueous MEA 30 wt% solution (4.91 M). Therefore, the KIER-C3 can be used as an effective absorbent for acid gas removal.

Original languageEnglish
Pages (from-to)2275-2281
Number of pages7
JournalKorean Journal of Chemical Engineering
Volume28
Issue number12
DOIs
Publication statusPublished - 2011 Dec

Keywords

  • Absorption
  • Carbon Dioxide
  • Heat of Regeneration

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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