A new method of amine solvent recovery with acid addition for energy reduction in the CO2 absorption process

Hyun Seung Lee, Na Ri Lee, Dae Ryook Yang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Chemical absorption/stripping technologies using an amine-based solvent have a lot of advantages for capturing carbon dioxide in post-combustion capture system. However, the higher energy demand for the solvent recovery makes the technology difficult to retrofit to existing plants. To overcome this obstacle, an alternative stripping process using an organic acid was studied to decrease the solubility of carbon dioxide and save the energy demand, but further research is necessary to recover the amine solvent and an organic acid effectively. In this study, a new amine recovery method using an organic acid is proposed and the method suggests a two-step of reaction crystallization process to separate the amine and the acid. This study demonstrates that an amine solvent (monoethanolamine, MEA) and an organic acid (oxalic acid) could be recycled effectively by reaction crystallization experiment. MEA and oxalic acid recovery efficiencies were also obtained using the experimental data in this study. The percentages of MEA recovery and the acid losses were estimated through these data. In addition, the energy demands for two recovery processes were estimated.

Original languageEnglish
Pages (from-to)2630-2638
Number of pages9
JournalChemical Engineering Research and Design
Volume91
Issue number12
DOIs
Publication statusPublished - 2013 Dec

Keywords

  • Absorption and Stripping process
  • Acid addition
  • Amine recovery
  • CO capture
  • MEA

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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