Kang, SW Kim, JH Won, J Char, K Kang, YS 2024-01-21T05:34:26Z 2024-01-21T05:34:26Z 2022-01-25 2005-02 0376-7388 https://pubs.kist.re.kr/handle/201004/136753 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.. (C) 2004 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV Effect of amino acids in polymer/silver salt complex membranes on facilitated olefin transport Article 10.1016/j.memsci.2004.08.028 1 JOURNAL OF MEMBRANE SCIENCE, v.248, no.1-2, pp.201 - 206 JOURNAL OF MEMBRANE SCIENCE 248 1-2 201 206 N scie scopus 000226883300021 2-s2.0-12344316881 Engineering, Chemical Polymer Science Engineering Polymer Science Article SILVER IONS OLEFIN/PARAFFIN SEPARATIONS ELECTROLYTES ADSORPTION PROPYLENE STABILITY MATRIX ANION Amino acids Complex membranes Olefin transport membranes