CO2 capture technologies: current status and new directions using supported ionic liquid phase (SILP) absorbers

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Current state-of-the-art techniques for CO2 capture are presented and discussed. Post-combustion capture of CO2 by absorption is the technology most easily retrofitted to existing installations, but at present this is not economically viable to install and run. Using ionic liquids instead of aqueous amine solutions overcomes the major thermodynamic issues. By applying SILP technology further advances, in terms of ease of handling and sorption dynamics, are obtained. Initial experimental studies showed that ionic liquids such as tetrahexylammonium prolinate, [N6666][Pro], provide a good candidate for CO2 absorption using SILP technology. Thus a solid SILP absorber comprised of 40 wt% [N6666][Pro] loaded on precalcined silica quantitatively takes up about 1.2 mole CO2 per mole of ionic liquid in consecutive absorption-desorption cycles in a flow-experiment performed with 0.09 bar of CO2 (9% CO2 in He).

Original languageEnglish
JournalScience China Chemistry
Publication date2012
Volume55
Issue8
Pages1648-1656
ISSN1674-7291
StatePublished

Keywords

  • CO2 capture, Absorption, Ionic liquids, SILP absorber
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