Preparation and performance assessment of binary and ternary PES-SAPO 34-HMA based gas separation membranes

Three new isomeric 6FDA-based polyimide-ionenes, with imidazolium moieties and varying regiochemistry (para-, meta-, and ortho- connectivity), and composites with three different ionic liquids (ILs) have been developed as gas separation membranes. The structural-property relationships and gas separation behaviors of the newly developed 6FDA polyimide-ionene + IL composites have been extensively studied. All the 6FDA-based polyimide-ionenes exhibited good compatibility with the ILs and produced homogeneous hybrid membranes with the high thermal stability of ~380 °C. Particularly, [6FDA I4A pXy][Tf2N] ionene + IL hybrids having [C4mim][Tf2N] and [Bnmim][Tf2N] ILs offered mechanically stable matrixes with high CO2 affinity. The permeability of CO2 was increased by factors of 2 and 3 for C4mim and Bnmim hybrids (2.15 to 6.32 barrers), respectively, compared to the neat [6FDA I4A pXy][Tf2N] without sacrificing their permselectivity for CO2/CH4 and CO2/N2 gas pairs.

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Synthesis and Performance of Polymerizable Room-Temperature Ionic Liquids as Gas Separation Membranes

Industrial & Engineering Chemistry Research ◽

10.1021/ie0704492 ◽

2007 ◽

Vol 46 (16) ◽

pp. 5397-5404 ◽

Cited By ~ 290

Author(s):

Jason E. Bara ◽

Sonja Lessmann ◽

Christopher J. Gabriel ◽

Evan S. Hatakeyama ◽

Richard D. Noble ◽

...

Keyword(s):

Ionic Liquids ◽

Gas Separation ◽

Room Temperature ◽

Room Temperature Ionic Liquids ◽

Separation Membranes ◽

Gas Separation Membranes ◽

And Performance

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Influence of coal power plant exhaust gas on the structure and performance of ceramic nanostructured gas separation membranes

International Journal of Greenhouse Gas Control ◽

10.1016/j.ijggc.2015.10.005 ◽

2015 ◽

Vol 43 ◽

pp. 46-56 ◽

Cited By ~ 5

Author(s):

Jan Eiberger ◽

Kai Wilkner ◽

Corinna Reetz ◽

Doris Sebold ◽

Natividad Jordan ◽

...

Keyword(s):

Power Plant ◽

Gas Separation ◽

Exhaust Gas ◽

Coal Power Plant ◽

Separation Membranes ◽

Gas Separation Membranes ◽

Coal Power ◽

And Performance

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Synthesis and Performance of Aromatic Polyamide Ionenes as Gas Separation Membranes

Membranes ◽

10.3390/membranes10030051 ◽

2020 ◽

Vol 10 (3) ◽

pp. 51 ◽

Cited By ~ 3

Author(s):

Kathryn E. O’Harra ◽

Irshad Kammakakam ◽

Danielle M. Noll ◽

Erika M. Turflinger ◽

Grayson P. Dennis ◽

...

Keyword(s):

Thin Films ◽

Ionic Liquid ◽

Gas Separation ◽

Thermophysical Properties ◽

Aromatic Polyamide ◽

Separation Membranes ◽

Gas Separation Membranes ◽

Gas Transport Properties ◽

Flexible Film ◽

And Performance

Here, we report the synthesis and thermophysical properties of seven primarily aromatic, imidazolium-based polyamide ionenes. The effects of varied para-, meta-, and ortho-connectivity, and spacing of ionic and amide functional groups, on structural and thermophysical properties were analyzed. Suitable, robust derivatives were cast into thin films, neat, or with stoichiometric equivalents of the ionic liquid (IL) 1-benzy-3-methylimidazolium bistriflimide ([Bnmim][Tf2N]), and the gas transport properties of these membranes were measured. Pure gas permeabilities and permselectivities for N2, CH4, and CO2 are reported. Consistent para-connectivity in the backbone was shown to yield the highest CO2 permeability and suitability for casting as a very thin, flexible film. Derivatives containing terephthalamide segments exhibited the highest CO2/CH4 and CO2/N2 selectivities, yet CO2 permeability decreased with further deviation from consistent para-linkages.

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