Carbon Molecular Sieving Membranes Derived from Condensed Polynuclear Aromatic (COPNA) Resins for Gas Separations

1998 ◽  
Vol 37 (11) ◽  
pp. 4262-4266 ◽  
Author(s):  
Katsuki Kusakabe ◽  
Satoru Gohgi ◽  
Shigeharu Morooka
Keyword(s):  
Gas Separations ◽  
Molecular Sieving

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 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).

Metal-containing and magnetic ionic liquids in analytical extractions and gas separations

2021 ◽  
Vol 140 ◽  
pp. 116275
Author(s):  
Marcelino Varona ◽  
Philip Eor ◽  
Luiz Carlos Ferreira Neto ◽  
Josias Merib ◽  
Jared L. Anderson
Keyword(s):  
Ionic Liquids ◽  
Gas Separations ◽  
Magnetic Ionic Liquids

scholarly journals Gas Permeation Properties of High-Silica CHA-Type Zeolite Membrane

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 249
Author(s):  
Yasuhisa Hasegawa ◽  
Chie Abe ◽  
Mayumi Natsui ◽  
Ayumi Ikeda
Keyword(s):  
Molecular Size ◽  
Gas Permeation ◽  
Zeolite Membrane ◽  
Type Zeolite ◽  
High Silica ◽  
Separation Of Co2 ◽  
Α Al2o3 ◽  
Separation Performances ◽  
Molecular Sieving ◽  
Permeation Properties

The polycrystalline CHA-type zeolite layer with Si/Al = 18 was formed on the porous α-Al2O3 tube in this study, and the gas permeation properties were determined using single-component H2, CO2, N2, CH4, n-C4H10, and SF6 at 303–473 K. The membrane showed permeation behavior, wherein the permeance reduced with the molecular size, attributed to the effect of molecular sieving. The separation performances were also determined using the equimolar mixtures of N2–SF6, CO2–N2, and CO2–CH4. As a result, the N2/SF6 and CO2/CH4 selectivities were as high as 710 and 240, respectively. However, the CO2/N2 selectivity was only 25. These results propose that the high-silica CHA-type zeolite membrane is suitable for the separation of CO2 from CH4 by the effect of molecular sieving.

Suppressing Defect Formation in Metal–Organic Framework Membranes via Plasma-Assisted Synthesis for Gas Separations

2021 ◽  
Vol 13 (35) ◽  
pp. 41904-41915
Author(s):  
Ming-Yang Kan ◽  
Qiang Lyu ◽  
Yu-Hong Chu ◽  
Cheng-Che Hsu ◽  
Kuang-Lieh Lu ◽  
...  
Keyword(s):  
Defect Formation ◽  
Metal Organic Framework ◽  
Gas Separations ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Molecular sieving using metal–polymer coordination membranes in organic media

2021 ◽  
Author(s):  
Rifan Hardian ◽  
Peter Pogany ◽  
Young Moo Lee ◽  
Gyorgy Szekely
Keyword(s):  
Chemical Resistance ◽  
Organic Media ◽  
Nanofiltration Membranes ◽  
Molecular Sieving ◽  
Metal Polymer

Improving the chemical resistance of membranes without sacrificing their molecular sieving performance is highly challenging. Herein, a novel scalable methodology was developed for fabricating solvent-resistant nanofiltration membranes based on metal–polymer...

scholarly journals Publisher Correction: Mixed matrix formulations with MOF molecular sieving for key energy-intensive separations

2021 ◽  
Author(s):  
Gongping Liu ◽  
Valeriya Chernikova ◽  
Yang Liu ◽  
Kuang Zhang ◽  
Youssef Belmabkhout ◽  
...  
Keyword(s):  
Mixed Matrix ◽  
Molecular Sieving
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