scholarly journals A highly permeable polyimide with enhanced selectivity for membrane gas separations

2014 ◽  
Vol 2 (14) ◽  
pp. 4874-4877 ◽  
Author(s):  
Yulia Rogan ◽  
Richard Malpass-Evans ◽  
Mariolino Carta ◽  
Michael Lee ◽  
Johannes C. Jansen ◽  
...  
Keyword(s):  
Gas Separations ◽  
Gas Selectivity ◽  
Intrinsic Microporosity ◽  
Molecular Sieving ◽  
Enhanced Selectivity

Introducing the highly rigid ethanoanthracene unit into polyimides of intrinsic microporosity provides an impressive enhancement of gas selectivity by molecular sieving.

scholarly journals A highly rigid and gas selective methanopentacene-based polymer of intrinsic microporosity derived from Tröger's base polymerization

2018 ◽  
Vol 6 (14) ◽  
pp. 5661-5667 ◽  
Author(s):  
Rhodri Williams ◽  
Luke. A. Burt ◽  
Elisa Esposito ◽  
Johannes C. Jansen ◽  
Elena Tocci ◽  
...  
Keyword(s):  
High Selectivity ◽  
Gas Separations ◽  
Structural Units ◽  
Polymer Of Intrinsic Microporosity ◽  
Troger's Base ◽  
Intrinsic Microporosity

A Polymer of Intrinsic Microporosity (PIM) constructed using exceptionally rigid methanopentacene structural units demonstrates high selectivity for gas separations.

scholarly journals Nanofiller-tuned microporous polymer molecular sieves for energy and environmental processes

2016 ◽  
Vol 4 (1) ◽  
pp. 270-279 ◽  
Author(s):  
Qilei Song ◽  
Shuai Cao ◽  
Robyn H. Pritchard ◽  
Hazim Qiblawey ◽  
Eugene M. Terentjev ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Gas Separations ◽  
Crosslinked Polymers ◽  
Environmental Processes ◽  
Microporous Polymer ◽  
Polymers Of Intrinsic Microporosity ◽  
Intrinsic Microporosity

Incorporating nanofillers into thermal-oxidatively crosslinked polymers of intrinsic microporosity (PIM-1) generates highly permeable and selective molecular sieves for gas separations.

scholarly journals A high-performance hydroxyl-functionalized polymer of intrinsic microporosity for an environmentally attractive membrane-based approach to decontamination of sour natural gas

2015 ◽  
Vol 3 (45) ◽  
pp. 22794-22806 ◽  
Author(s):  
Shouliang Yi ◽  
Xiaohua Ma ◽  
Ingo Pinnau ◽  
William J. Koros
Keyword(s):  
Natural Gas ◽  
High Performance ◽  
Gas Separations ◽  
P Sorption ◽  
Polymer Of Intrinsic Microporosity ◽  
Intrinsic Microporosity ◽  
Permeation Properties

Sorption and permeation properties of a hydroxyl-functionalized polymer with intrinsic microporosity are reported for aggressive sour natural gas separations.

scholarly journals Polymers of intrinsic microporosity for energy-intensive membrane-based gas separations

2018 ◽  
Vol 3 ◽  
pp. 69-95 ◽  
Author(s):  
Y. Wang ◽  
X. Ma ◽  
B.S. Ghanem ◽  
F. Alghunaimi ◽  
I. Pinnau ◽  
...  
Keyword(s):  
Gas Separations ◽  
Polymers Of Intrinsic Microporosity ◽  
Intrinsic Microporosity

Physical aging of polymers of intrinsic microporosity: a SAXS/WAXS study

2014 ◽  
Vol 2 (30) ◽  
pp. 11742-11752 ◽  
Author(s):  
Amanda G. McDermott ◽  
Peter M. Budd ◽  
Neil B. McKeown ◽  
Coray M. Colina ◽  
James Runt
Keyword(s):  
Film Thickness ◽  
Free Volume ◽  
Physical Aging ◽  
Gas Separations ◽  
X Ray ◽  
Membrane Performance ◽  
X Ray Scattering ◽  
Polymeric Glasses ◽  
Polymers Of Intrinsic Microporosity ◽  
Intrinsic Microporosity

X-ray scattering patterns from these high free-volume polymeric glasses contain a feature strongly associated with porosity; it is sensitive to time, temperature and film thickness in a manner consistent with physical aging, which impacts membrane performance in gas separations.

scholarly journals Development of Monolithic Materials with and without a Binder with Carbon Molecular Sieving Properties

2008 ◽  
Vol 587-588 ◽  
pp. 805-809
Author(s):  
J.M. Valente Nabais ◽  
A. Padre-Eterno ◽  
Peter J.M. Carrott ◽  
Manuela M.L. Ribeiro Carrott ◽  
Cristina Galacho
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Phenolic Resin ◽  
Sem Analysis ◽  
Gas Separations ◽  
Carbon Fibres ◽  
Acrylic Fibre ◽  
Good Potential ◽  
Activated Carbon Fibres ◽  
Molecular Sieving

In this work we studied the production of activated carbon fibres in monolith shape from a commercial textile acrylic fibre. The monoliths were produced with and without a binder. The binders tested were phenolic resin, polystyrene, polymethylmethacrylate and clay. We also tested the influence of using a solvent. The SEM analysis indicates that the monoliths are made of filaments that can be considered activated carbon fibres. The type of binder influences the fibre orientation, degradation and materials shrinkage, the worst results being obtained from the use of polymethylmethacrylate and polystyrene in toluene. The best results are obtained when the monoliths were produced only with acrylic fibre and with phenolic resin as binder. The use of solvents has opposite effects for the carbonised and activated samples. In the former case it seems that the water can be fibre protective but during activation the presence of water leads to an increase in the monolith’s burn-off. The methodology used leads to the formation of excellent samples for performing the gas separations O2/N2 and CO2/CH4. Some samples show maximum selectivity for the referred separations because N2 and CH4 are almost totally excluded from the porous structure which indicates a good potential to be utilised in PSA systems or for natural gas purification. The adsorption capacity is very dependent on the conditions used. Nevertheless, the best sample has a considerably high adsorption capacity (32cm3g-1 for CO2 and 4cm3g-1 for O2, after 200s contact time).

Controlling Gas Selectivity in Molecular Porous Liquids by Tuning the Cage Window Size

2019 ◽  
Author(s):  
Benjamin Egleston ◽  
Konstantin V. Luzyanin ◽  
Michael C. Brand ◽  
Rob Clowes ◽  
Michael E. Briggs ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Synthesis ◽  
Field Gradient ◽  
Window Size ◽  
Standard Approach ◽  
Porous Solids ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field ◽  
Cage Molecules ◽  
Gas Selectivity

Control of pore window size is the standard approach for tuning gas selectivity in porous solids. Here, we present the first example where this is translated into a molecular porous liquid formed from organic cage molecules. Reduction of the cage window size by chemical synthesis switches the selectivity from Xe-selective to CH<sub>4</sub>-selective, which is understood using <sup>129</sup>Xe, <sup>1</sup>H, and pulsed-field gradient NMR spectroscopy.

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