CO2 plasticization of polyethersulfone/polyimide gas-separation membranes

被引:63
作者
Kapantaidakis, GC
Koops, GH [1 ]
Wessling, M
Kaldis, SP
Sakellaropoulos, GP
机构
[1] Univ Twente, Fac Chem Technol, NL-7500 AE Enschede, Netherlands
[2] Aristotle Univ Thessaloniki, Dept Chem Engn, GR-54006 Thessaloniki, Greece
关键词
D O I
10.1002/aic.690490710
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This work reports the CO2 plasticization of gas-separation hollow-fiber membranes based on polyimide and polyethersulfone blends. The feed pressure effect on the permeance of pure gases (CO2, N-2) and the separation performance of a gaseous mixture (CO2/N-2, 55/45%) is examined. Contrary to dense membranes, the permeance of CO2 through ultrathin asymmetric fibers increases immediately with pressure resulting in pronounced apparent plasticization and reduction of the ideal CO2/N-2 selectivity. However, no evidence of plasticization was observed when a CO2/N-2, 55/45% mixture was fed to the hollow-fiber membranes. In all cases, CO2 permeance decreased with pressure, while that of N2 remained constant. Experimental results were validated by means of mathematical modeling. Membrane-separation performance was overestimated when pressure-independent permeabilities were used in the model, while pressure-dependent permeabilities, due to the overall effect of plasticization and competition phenomena, explained excellently, the obtained stage-cut and permeate purity.
引用
收藏
页码:1702 / 1711
页数:10
相关论文
共 39 条
[1]   Future directions of membrane gas separation technology [J].
Baker, RW .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2002, 41 (06) :1393-1411
[2]   CO2-induced plasticization phenomena in glassy polymers [J].
Bos, A ;
Pünt, IGM ;
Wessling, M ;
Strathmann, H .
JOURNAL OF MEMBRANE SCIENCE, 1999, 155 (01) :67-78
[3]   Plasticization-resistant glassy polyimide membranes for CO2/CO4 separations [J].
Bos, A ;
Punt, IGM ;
Wessling, M ;
Strathmann, H .
SEPARATION AND PURIFICATION TECHNOLOGY, 1998, 14 (1-3) :27-39
[4]  
Bos A, 1998, J POLYM SCI POL PHYS, V36, P1547, DOI 10.1002/(SICI)1099-0488(19980715)36:9<1547::AID-POLB12>3.0.CO
[5]  
2-5
[6]   Suppression of gas separation membrane plasticization by homogeneous polymer blending [J].
Bos, A ;
Pünt, I ;
Strathmann, H ;
Wessling, M .
AICHE JOURNAL, 2001, 47 (05) :1088-1093
[7]   PLASTICIZATION OF GLASSY-POLYMERS BY CO2 [J].
CHIOU, JS ;
BARLOW, JW ;
PAUL, DR .
JOURNAL OF APPLIED POLYMER SCIENCE, 1985, 30 (06) :2633-2642
[8]   Development of asymmetric 6FDA-2,6DAT hollow fiber membranes forCO2/CH4 separation Part 2.: Suppression of plasticization [J].
Chung, TS ;
Ren, JH ;
Wang, R ;
Li, DF ;
Liu, Y ;
Pramoda, KP ;
Cao, C ;
Loh, WW .
JOURNAL OF MEMBRANE SCIENCE, 2003, 214 (01) :57-69
[9]   Formation of ultrathin high-performance polyethersulfone hollow-fiber membranes [J].
Chung, TS ;
Teoh, SK ;
Hu, XD .
JOURNAL OF MEMBRANE SCIENCE, 1997, 133 (02) :161-175
[10]   PERMEATION BEHAVIOR OF CARBON-DIOXIDE METHANE MIXTURES IN CELLULOSE-ACETATE MEMBRANES [J].
DONOHUE, MD ;
MINHAS, BS ;
LEE, SY .
JOURNAL OF MEMBRANE SCIENCE, 1989, 42 (03) :197-214