Nanofiltration for the concentration of heat stable salts prior to MEA reclamation

Lim,J, Scholes,CA, Dumée,LF and Kentish,SE 2014, Nanofiltration for the concentration of heat stable salts prior to MEA reclamation, International journal of greenhouse gas control, vol. 30, pp. 34-41, doi: 10.1016/j.ijggc.2014.08.020.

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Title Nanofiltration for the concentration of heat stable salts prior to MEA reclamation
Author(s) Lim,J
Journal name International journal of greenhouse gas control
Volume number 30
Start page 34
End page 41
Total pages 8
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2014-11
ISSN 1750-5836
Keyword(s) Heat stable salts
Science & Technology
Energy & Fuels
Engineering, Environmental
Summary While monethanolamine has shown great potential as a solvent for the capture of carbon dioxide, impurities can build within the solution over time, leading to increased viscosity and corrosivity. Classically, these impurities are removed by a combination of neutralization and either thermal reclamation, ion exchange or electrodialysis. In this work, we evaluate the use of nanofiltration to concentrate the heat stable salts within the solution prior to such reclamation. This allows the recirculating solvent to operate with low concentrations of these impurities, while providing a low volume, concentrated solution for reclamation. Results show that nanofiltration can reject greater than 80% of the heat stable anions, while allowing the monoethanolamine to permeate through the membrane, for return to the process. Rejection of the MEA itself is less than 7%. The nanofiltration operation is only effective on lean solvent with CO2 loadings of less than 0.2 and neutralization would be required upstream to deprotonate the amine. The two membranes tested (Koch MPF-34 and MPF-36) appeared stable to exposure to the solvent for over four months.
Language eng
DOI 10.1016/j.ijggc.2014.08.020
Field of Research 030605 Solution Chemistry
090404 Membrane and Separation Technologies
Socio Economic Objective 859803 Management of Greenhouse Gas Emissions from Energy Activities (excl. Electricity Generation)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Elsevier
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