Facilitated transport of CO2 through Co(II)-S-EPDM ionomer membrane

被引:32
|
作者
Hosseinkhani, Omolbanin [1 ]
Kargari, Ali [1 ]
Sanaeepur, Hamidreza [1 ]
机构
[1] Amirkabir Univ Technol, Tehran Polytech, Dept Petrochem Engn, Membrane Proc Res Lab, Mahshahr, Iran
关键词
Facilitated transport membrane; CO2; separation; Fixed carrier; Co(II)-S-EPDM; Ionomer membrane; EMULSION LIQUID-MEMBRANE; REVERSIBLE OXYGEN-BINDING; AQUEOUS-SOLUTIONS; GOLD(III) IONS; GAS SEPARATION; COMPOSITE MEMBRANES; MOLECULAR-OXYGEN; CARBON-DIOXIDE; EPDM; PERTRACTION;
D O I
10.1016/j.memsci.2014.06.021
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A new facilitated transport ionomer membrane was prepared by incorporating Co(II) ions, as fixed carrier, into the sulfonated ethylene-propylene-diene terpolymer, Co(II)-S-EPDM, and was applied for preferential transport of carbon dioxide rather than nitrogen from CO2/N-2 gas streams. The membranes were also characterized by using the FTIR, SEM and TG/DSC analyses. Furthermore, single gas permeation experiments at different membrane thicknesses (30 and 200 mu m), sulfonic group contents (0.1 and 0.2 mmol of sulfonic acid (SO3H)/g EPDM), feed gas pressures (2-10 bar) and temperatures (30-50 degrees C) were carried out. The permeation results of the dense Co(II)-S-EPDM ionomer membranes show that the incorporation of Co(II) ions into the sulfonated EPDM ionomers increases the permeance of both CO2 and N-2 gases. Moreover, due to facilitated CO2 transport by the carriers, the CO2/N-2 selectivity is also increased. These are mainly attributed to the formation of polymer coordinate complexes in the ionomer. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:151 / 161
页数:11
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