The strategies of molecular architecture and modification of polyimide-based membranes for CO2 removal from natural gas—A review

Xiao, Youchang; Low, Bee Ting; Hosseini, Seyed Saeid; Chung, Tai‐Shung; Paul, Donald R

doi:10.1016/j.progpolymsci.2008.12.004

Cited by 529 publications

(234 citation statements)

References 152 publications

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“…The density of the membrane was evaluated using the method of repeatedly weighing the mass of polymer in air and in demineralized, re-boiled water [30] at (25±1) ºC; the density of pure PIM-1 was (1.143±0.008) g/cm 3 . The effect of water sorption in PIM-1 on the measured density was corrected by measuring the masses of a polymer sample just removed from the vacuum oven and after its exposure to saturated water vapor for ca.…”

Section: Polymer Densitymentioning

confidence: 99%

“…in natural gas and biogas processing, has been under the attention of membrane scientists. [1][2][3][4] Membrane technology may be more advantageous than conventional absorption of acid gases in basic solvents, and pressure swing adsorption (PSA), for small-to-medium scale separations and those not requiring stringent product purity. In particular, it is highly desirable to explore membrane materials which can selectively remove CO 2 from gas mixtures, thereby maintaining CH 4 at or near feed pressure to avoid gas recompression.…”

Section: Introductionmentioning

confidence: 99%

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Mixed gas sorption in glassy polymeric membranes: II. CO2/CH4 mixtures in a polymer of intrinsic microporosity (PIM-1)

Vopička

Angelis

et al. 2014

Journal of Membrane Science

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The individual solubility of CH 4 and CO 2 from binary gas mixtures was measured at 35 °C and up to 35 bar in a polymer of intrinsic microporosity (PIM-1), at different compositions of the gas phase (from 0 to 50 mol% of CO 2 ). The experiments were conducted on a pressure-decay apparatus equipped with a gas chromatograph, allowing a highly flexible measuring procedure. The gas solubility was plotted versus gas phase composition, total pressure, gas fugacity and second gas concentration. The mixed gas solubility of both species, CH 4 and CO 2 , is lower than the pure gas value at the same fugacity, but the reduction of methane solubility due to the presence of CO 2 is generally more significant. Such behavior is due to the fact that CO 2 has normally higher solubility than methane: indeed the depression of the solubility coefficient with respect to the pure gas value is similar for both gases, when reported at the same concentration of the second gas.The real, mixed gas solubility selectivity is in general higher than the ideal value calculated from pure gas behavior. The ratio between real and ideal solubility selectivity increases with CO 2 concentration in the membrane, according to a single mastercurve, reaching a maximum value of 4, and increases also with the ratio between CO 2 and CH 4 concentration in the membrane. In particular, as in the case of other glassy polymers, the real solubility selectivity of CO 2 over CH 4 is higher than the ideal value if c(CO 2 )>c(CH 4 ), and it is lower than the ideal value if the opposite condition holds true. Such behavior occurs because the competition for sorption is normally less effective on the more abundant penetrant in the polymer. A selectivity-solubility performance plot can be drawn for this system.

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Section: Polymer Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mixed gas sorption in glassy polymeric membranes: II. CO2/CH4 mixtures in a polymer of intrinsic microporosity (PIM-1)

Vopička

Angelis

et al. 2014

Journal of Membrane Science

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“…Poly(ether imide), PEI, is a thermoplastic polymer that has ether (-O-) and isopropylidene (-C(CH 3 ) 2 -) groups, which not only ensure high rigidity, thermal stability, chemical resistance, and mechanical strength, but also are more easily processed during film synthesis [1][2][3][4][5][6][7] . Because of its excellent properties-price-processability balance 3 , it has gained importance in a wide variety of applications ranging from membranes 1,2,[4][5][6][7][8] , sensors 9,10 , and as a parent material for synthesis of composites 6,8,11 , ion exchange films (dialysis, electrodialysis, or full cells) 5,11,12 , polymer blends 2,6 , and modified polymers 1,[3][4][5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

“…More recently, poly(imide)s and poly(ether imide)s based membranes have shown some of the best permeability and selectivity properties for natural gas (CO 2 /CH 4 ) and air (O 2 / N 2 ) separations which subsequently influences chain rigidity and packing efficiency. Sulfonic side groups have polar characteristics that enhance the effect of electrostatic crosslinking on the packing density of polymer chains resulting in an decrease in CO 2 , O 2 , and N 2 permeabilities at the same time that increase the CO 2 /air ideal selectivities 6 . Some typical values for sulfonated glassy polymers were found in the range 2 to 5.2 for CO 2 /O 2 and 25 to 35 for CO 2 /N 2 21,22 .…”

Section: Introductionmentioning

confidence: 99%

“…Some typical values for sulfonated glassy polymers were found in the range 2 to 5.2 for CO 2 /O 2 and 25 to 35 for CO 2 /N 2 21,22 . Further, it often makes the membranes more resistant to plasticization 6,19,20,22,23 , what impart not only efficiency in fuel cells 15,16 , but also selectivity for CO 2 separations by gas permeation 6,[19][20][21][22][23] . On the other hand, sulfonation of an aromatic polymer can be very complex because of its reversibility, and can lead to polymer degradation and to losses in thermal and mechanical stability 2,4 .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of sulfonated poly(ether imide) with higher thermal stability and effect on CO2, N2, and O2 permeabilities

et al. 2014

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An experimental design in different reaction conditions was applied to modify poly(ether imide), PEI, by sulfonation using acetyl sulfate. Higher temperatures and reaction times led to higher ion exchange capacity. The thermal analysis showed that our sulfonation approach accomplished preparing sulfonated PEI maintaining the thermal stability of its parent material even for the film with highest degree of sulfonation, and assessed the effect of this change on CO 2 , O 2 and N 2 permeabilities. The permeability results pointed out that our sulfonation approach is an effective way to produce high performance engineered polymers for fuel cell electrolyte membranes and for CO 2 separation from air. These results also suggest that the use of milder reactive medium at higher temperatures and for longer reaction times seems to be a more promising approach to achieve thermal stability than use more aggressive sulfonation agents.

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Polymeric Membranes for Energy Applications

Low

Wang

Chung

2010

Encyclopedia of Polymer Science and Technology

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The volatile and escalating oil prices, combined with the environmental consequences of anthropogenic carbon dioxide emissions, have led to the growing interest in the development of alternative energy sources. The world energy consumption continues to be at the core of the climate change debate and the use of natural gas and fossil‐derived hydrogen is recommended to alleviate global warming. In the long run, biofuel represents an important renewable resource for attaining energy sustainability. Membrane technology is a promising separation technique for natural gas, hydrogen, and biofuel purifications. Polymeric membranes remain the most viable commercial choice and substantial research works on the design of polymers with improved separation performance and physicochemical properties are in progress. Various approaches have been utilized by membrane scientists to overcome the bottlenecks and to achieve this goal. In this review, a critical survey on polymeric membranes for gas separation and pervaporation in energy‐related applications is presented. The merits and deficiencies of existing polymeric membrane are evaluated. The vital aspects of membrane process design and the future prospects of membrane‐based separations are highlighted.

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The strategies of molecular architecture and modification of polyimide-based membranes for CO2 removal from natural gas—A review

Cited by 529 publications

References 152 publications

Mixed gas sorption in glassy polymeric membranes: II. CO2/CH4 mixtures in a polymer of intrinsic microporosity (PIM-1)

Mixed gas sorption in glassy polymeric membranes: II. CO2/CH4 mixtures in a polymer of intrinsic microporosity (PIM-1)

Synthesis and characterization of sulfonated poly(ether imide) with higher thermal stability and effect on CO2, N2, and O2 permeabilities

Polymeric Membranes for Energy Applications

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