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Effect of amino acids in polymer/silver salt complex membranes on facilitated olefin transport

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Authors
Kang, Sang Wook; Kim, Jong Hak; Won, Jongok; Char, Kookheon; Kang, Yong Soo
Issue Date
2004-11-24
Publisher
Elsevier
Citation
J. Memb. Sci. 248 (2004) 201
Keywords
Amino acidsOlefin transport membranesComplex membranes
Abstract
The effect of amino acids such as asparagine, valine, glutamic acid and glycine on silver ion activity as a olefin carrier in membrane consisting of silver ions dissolved in poly(2-ethyl-2-oxazoline) (POZ) has been investigated. The presence of amino acids leads to the weakened interaction of the silver ion with its counteranion resulting from the electrostatic interaction between counteranion and NH3+ of amino acids, as confirmed by FT-IR spectra. As a result, the mixed gas permeances and selectivities of propylene/propane through POZ/AgBF4 or POZ/AgNO3 membranes intriguingly increased upon addition of the amino acids. However, the improvement of separation performance is strongly dependent on the type and the concentration of amino acids. Among the amino acids tested, the presence of asparagine containing amide group was found to improve the separation performance of the membranes most significantly. On the other hand, the performance of membrane with lysine containing amine group was the lowest, indicating the amine is not the effective ligand for silver ion in facilitated olefin transport membranes.
ISSN
0376-7388
Language
English
URI
http://hdl.handle.net/10371/5773
DOI
https://doi.org/10.1016/j.memsci.2004.08.028
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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