Enhanced CO2 carrier activity of potassium cation with fluorosilicate anions for facilitated transport membranes
- Title
- Enhanced CO2 carrier activity of potassium cation with fluorosilicate anions for facilitated transport membranes
- Author
- 강용수
- Keywords
- CO2; Facilitated transport; Polymer electrolyte; Potassium; Fluorosilicates; OLEFIN TRANSPORT; ELECTROLYTE MEMBRANES; PERMEABILITY; SEPARATIONS
- Issue Date
- 2014-09
- Publisher
- ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
- Citation
- Journal of Membrane Science, 2014, 466, P.357-360
- Abstract
- In this study, we report the enhanced carrier activity of potassium cation (K+) not only with fluoride but also fluorosilicate anions, prepared by the simple heat-treatment of polymer electrolyte solution in glass vial. The formation of water-soluble fluorosilicate anions such as SiF5(H2O)(-) was investigated by F-19 NMR spectroscopy and thermogravimetric analysis (TGA). The XPS data revealed the increased binding energy of K2p(3/2) up to 294.6 eV with broad spectrum for F1s binding energy. The interaction between K+ and the amide groups of PVP was confirmed by FT-IR spectroscopy. As a result, membranes containing K+ demonstrated a selectivity ratio CO2/N-2 and CO2/CH4 of 25.62 and 25.87, respectively, with a CO2 permeance of 52.01 GPU. This enhanced separation performance was mostly attributable to the counter-anion effect on K+ carrier activity, resulting in the increased CO2 transport compared to the previous system. (C) 2014 Elsevier B.V. All rights reserved.
- URI
- http://www.sciencedirect.com/science/article/pii/S0376738814003743http://hdl.handle.net/20.500.11754/48957
- ISSN
- 0376-7388
- DOI
- 10.1016/j.memsci.2014.05.010
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML