Monoethanolamine reclamation using electrodialysis

J. Lim, A. Aguiar, C. A. Scholes, L. F. Dumée, G. W. Stevens, S. E. Kentish

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Monoethanolamine (MEA) is the benchmark solvent for the capture of carbon dioxide from both natural gas and flue gas streams. Despite its effectiveness in absorbing CO2, this solvent can react with impurities in the gas stream to form heat stable salts and other degradation products. These impurities can cause problems such as an increase in solvent viscosity and corrosion of the operating units. Thus, a number of approaches have been considered to mitigate the occurrence of these problems. In this paper, the use of electrodialysis as an online MEA reclamation process in a postcombustion CO2 capture facility is investigated. The study shows that high heat stable salts removal can be achieved with a high MEA recovery. However, it is necessary to limit the current density, particularly at lower salt concentrations, to reduce water splitting. The stability of the commercial ion-exchange membranes in the highly alkaline solvent is also investigated. The results show that the membranes are stable upon exposure to 30 wt % MEA for at least 4.5 months.

Original languageBritish English
Pages (from-to)19313-19321
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Issue number49
StatePublished - 10 Dec 2014


Dive into the research topics of 'Monoethanolamine reclamation using electrodialysis'. Together they form a unique fingerprint.

Cite this