Post on 16-Nov-2014
description
RESEARCH POSTER PRESENTATION DESIGN © 2012
www.PosterPresentations.com
Natural gas (NG) processing and membrane technology are two very important fields that are of great significance due to increasing demand for energy as well as gas mixtures separation. While NG is projected to be the number one primary source of energy by 2050, membrane separation is a commercially successful competitor to other separation techniques for energy efficient gas purification processes (Qiu et al., 2011). Most of the NG produced in the world is coproduced with acid gases such as CO2 which need to be removed to increase the caloric value of NG. A comprehensive review of research efforts in CO2 separation from natural gas is required to capture details of the current scientific and technological progresses on the development of new membrane materials with tailored gas transport properties, and the improvement of properties of the existing ones. This paper presents the progresses that have been achieved in the area of material science and engineering to eliminate the limitations that dominate the large scale application of membrane materials at the present time. Research efforts in material development in the context of the break through and challenges that exist for major industrial applications of membrane in CO2 removal from NG are reported.
Abstract
Challenges in Membrane Materials Development for Gas Separation
CO2-induced Plasticization and Conditioning
Figure 4. Permeability of CO2 as a function of Feed Pressure in Glassy PSF and Rubbery PEO (Data used were obtained from Scholes et al., (2010); and Lin and Freeman (2004)).
Membrane with Higher Plasticization Pressure
Figure 5. Separation Performance of Decarboxylation-induced Thermal Crosslinking of Hollow Fiber 6FDA-DAM:DABA (3:2) Membrane for Pure CO2 Gas (Data were obtained from Qiu et al., 2011)
References
Figure 6. (a) Separation Performance of Decarboxylation-induced Thermal Crosslinking of Hollow Fiber 6FDA-DAM:DABA (3:2) Membrane for 50%CO2 /50% CH4 Gas using data from Qiu et al. (2011) (b)Improved Plasticization Resistance via Crosslinking of 6FDA-DAM-DABA (2:1) using data from Staudt-Bickel & Koros (1999); and Kratochvil & Koros (2008)
The three important identified challenges are:
1.Better gas selectivity without sacrificing gas permeability
2.Problem of CO2-induced plasticization and conditioning
3.Maintaining the long-term gas separation performance by overcoming the problems of physical aging
Askari, M., Xiao, Y., Li, P., & Chung, T.-S. (2012 ). Natural gas purification and olefin/paraffin separation using cross-linkable 6FDA-Durene/DABA co-polyimides grafted with α,β and γ cyclodextrin. Journal of Membrane Science , 390– 391 , 141– 151.
Bernardo, P., Drioli, E., & Golemme, G. (2009). Membrane Gas Separation: A Review/State of the Art. Ind. Eng. Chem. Res. , 48, 4638–4663.
Han, S. H., Lee, J. E., Lee, K.-J., Park, H. B., & Lee, Y. M. (2010). Highly gas permeable and microporous polybenzimidazole membrane by thermal rearrangement. Journal of Membrane Science , 357 , 143–151.
Kratochvil, A. M., & Koros, W. J. (2008). Decarboxylation-Induced Cross-Linking of a Polyimide for Enhanced CO2 Plasticization Resystance. Macromolecules , 41, 7920- 7927.
Lin, H., & Freeman, B. (2004 ). Gas solubility, diffusivity and permeability in poly(ethylene oxide). Journal of Membrane Science , 239 , 105–117.
Park, H. B., Han, S. H., Jung, C. H., Lee, Y. M., & Hill, A. J. (2010). Thermally rearranged (TR) polymer membranes for CO2 separation. Journal of Membrane Science , 359 , 11–24.
Qiu, W., Chen, C.-C., Xu, L., Cui, L., Paul, D. R., & Koros, W. (2011). Sub-Tg Cross-Linking of a Polyimide Membrane for Enhanced CO2 Plasticization Resistance for Natural Gas Separation. Macromolecules , 44, 6046–6056.
Scholes, C. A., Chen, G. Q., Stevens, G., & Kentish, S. E. (2010). Plasticization of ultra-thin polysulfone membranes by carbon dioxide. Journal of Membrane Science , 346 , 208–214.
Staudt-Bickel, C., & Koros, W. J. (1999). Improvement of CO2/CH4 separation characteristics of polyimides by chemical crosslinking. Journal of Membrane Science , 155, 145–154.
Wind, J. D., Paul, D. R., & Koros, W. J. (2004 ). Natural gas permeation in polyimide membranes. Journal of Membrane Science , 228 , 227–236.
Xiao, Y., Low, B. T., Hosseini, S. S., Chung, T. S., & Paul, D. R. (2009 ). The strategies of molecular architecture and modification of polyimide-based membranes for CO2 removal from natural gas - A review. Progress in Polymer Science , 34 , 561–580
Figure 3. Thermally Rearranged Polymer Membranes that Surpassed the 2008 Upper Bound [(a) Han et al., (2010) (b) Park et al. (2010)]
Figure 2. Robeson’s 1991 and 2008 Upper Bound Curves Representing a General Trade-Off for Membrane Gas Separation Performance
[(a) Wind et al., (2004); (b) Xiao et al., (2009)]
Figure 1. Permeability and Permselectivity of gases at feed pressure of 3.5 bar; membrane thickness of 20 μm (Bernardo et al., 2009)
180oC, 24hr 330oC, 20hr 350oC, 1hr
130
250 265
27 27 2655 69 69
Separation Performance of Decarboxylation-induced Thermal Crosslinking of Hollow Fiber 6FDA-DAM:DABA (3:2) Membrane for
50%CO2 /50% CH4Gas (Qiu et al., 2011)
Permeability PermSelectivity Plasticization Pressure(barrer) (bar)
Better Balance of Selectivity and Permeability
School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
Jimoh K. Adewole and Abdul Latif Ahmad
Membrane Separation of CO2 from Natural Gas:
A State-of-the-Art Review on Material Development
0
100
200
300
400
500
600
Cellulose Accetae
Cytop Hyflon AD 60
Hyflon AD 80
Teflon AF 1600
Perm
eabi
lity
(bar
rer)
Permeability of Commercial Membranes
0
5
10
15
20
25
30
35
40
45
50
Cellulose Accetae
Cytop Hyflon AD 60
Hyflon AD 80
Teflon AF 1600
Perm
sele
ctiv
ity
Permselectivity of Commercial Membranes
(a)
120oC, 24hr 180oC, 24hr 300oC, 20hr 330oC, 20hr 350oC, 1hr 370oC, 1hr
150 140190
290330
450
1445 48 48 48 48
Separation Performance of Decarboxylation-induced Thermal Crosslinking of Hollow Fiber 6FDA-DAM:DABA (3:2) Membrane for
Pure CO2 Gas (Qiu et al., 2011)
Permeability (Barrer) Plasticization Pressure (Bar)
0
10
20
30
40
50
60
Crosslinked with Ethylene glycol in
DMAc
Decarboxylation at high Temperature
+220 oC, 23hr
Decarboxylation at high Temperature+220 oC, 23hr + rapid Quenching from above Tg
Pla
stic
izat
ion
Pre
ssur
e (b
ar)
Improved Antiplasticization Resistance via Crosslinking of 6FDA-DAM-DABA (2:1) (Staudt-Bickel & Koros ,1999; and
Kratochvil & Koros, 2008)
0
2
4
6
8
10
12
14
16
18
20
7
7.5
8
8.5
9
9.5
10
0 2 4 6 8 10 12 14 16
Per
mea
bil
ity
in P
EO
(B
arr
er)
Perm
eab
ilit
y in
PS
F (
Barr
er)
Feed Pressure (atm)
Polysulfone (PSF) Polyethylene oxide (PEO)
Permeability of CO2 as a function of Feed Pressure in Glassy PSF and Rubbery PEO (Scholes et al., 2010; and Lin and Freeman, 2004)
Minimum Permeability
Plasticization Pressure
(b)
(a) (b)
Department of Chemical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia DSL333