scholarly journals Highly permeable and selective mixed-matrix membranes for hydrogen separation containing PAF-1

2020 ◽  
Vol 8 (29) ◽  
pp. 14713-14720 ◽  
Author(s):  
Rujing Hou ◽  
Bader S. Ghanem ◽  
Stefan J. D. Smith ◽  
Cara M. Doherty ◽  
Caitlin Setter ◽  
...  
Keyword(s):  
Polymer Chain ◽  
Hydrogen Permeability ◽  
Hydrogen Separation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes

Porous PAF-1 addition accelerated TPIM-2 polymer chain densification and resulted in both improved hydrogen permeability and selectivity.

Mixed matrix membranes with molecular-interaction-driven tunable free volumes for efficient bio-fuel recovery

2015 ◽  
Vol 3 (8) ◽  
pp. 4510-4521 ◽  
Author(s):  
Gongping Liu ◽  
Wei-Song Hung ◽  
Jie Shen ◽  
Qianqian Li ◽  
Yun-Hsuan Huang ◽  
...  
Keyword(s):  
Polymer Chain ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Chain Conformation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Polymer Chain Conformation ◽  
Matrix Membranes

Molecular interactions were constructed to control polymer chain conformation to fabricate mixed matrix membranes with tunable free volumes, exhibiting simultaneously improved butanol permeability and selectivity.

Small-pore CAU-21 and porous PIM-1 in mixed-matrix membranes for improving selectivity and permeability in hydrogen separation

2019 ◽  
Vol 55 (49) ◽  
pp. 7101-7104 ◽  
Author(s):  
Chi Zhang ◽  
Baisong Liu ◽  
Gaimei Wang ◽  
Guangli Yu ◽  
Xiaoqin Zou ◽  
...  
Keyword(s):  
Hydrogen Separation ◽  
Mixed Matrix Membranes ◽  
High Porosity ◽  
Mixed Matrix ◽  
Small Aperture ◽  
Small Pore ◽  
Matrix Membranes

Very selective and permeable membranes for hydrogen separation have been fabricated by hybridizing CAU-21 MOF with a small aperture and PIM-1 polymer with high porosity.

Facile One-Pot Synthesis of PdM (M=Ag, Ni, Cu, Y) Nanowires for use in Mixed Matrix Membranes for Efficient Hydrogen Separation

2021 ◽  
Author(s):  
Abhishek Kumar ◽  
Liang Huang ◽  
Leiqing Hu ◽  
Deqiang Yin ◽  
Haiqing Lin ◽  
...  
Keyword(s):  
Hydrogen Separation ◽  
Mixed Matrix Membranes ◽  
Palladium Alloy ◽  
Mixed Matrix ◽  
One Pot ◽  
One Pot Synthesis ◽  
Metallic Salts ◽  
Alloy Nanowires ◽  
Matrix Membranes

Palladium and palladium alloy nanowires (PdM; M= Ag, Ni, Cu, Y) of varying compositions were synthesized by facile and scalable one-pot polyol reduction of metallic salts using poly(vinylpyrrolidone) (PVP) as...

scholarly journals Hydrogen Recovery by Mixed Matrix Membranes Made from 6FCl-APAF HPA with Different Contents of a Porous Polymer Network and Their Thermal Rearrangement

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4343
Author(s):  
Cenit Soto ◽  
Edwin S. Torres-Cuevas ◽  
Alfonso González-Ortega ◽  
Laura Palacio ◽  
Pedro Prádanos ◽  
...  
Keyword(s):  
Upper Bound ◽  
High Selectivity ◽  
Hydrogen Permeability ◽  
Polymer Network ◽  
Porous Polymer ◽  
Mixed Matrix Membranes ◽  
Thermal Rearrangement ◽  
Mixed Matrix ◽  
High Hydrogen ◽  
Matrix Membranes

Mixed matrix membranes (MMMs) consisting of a blend of a hydroxypolyamide (HPA) matrix and variable loads of a porous polymer network (PPN) were thermally treated to induce the transformation of HPA to polybenzoxazole (β-TR-PBO). Here, the HPA matrix was a hydroxypolyamide having two hexafluoropropyilidene moieties, 6FCl-APAF, while the PPN was prepared by reacting triptycene (TRP) and trifluoroacetophenone (TFAP) in a superacid solution. The most probable size of the PPN particles was 75 nm with quite large distributions. The resulting membranes were analyzed by SEM and AFM. Up to 30% PPN loads, both SEM and AFM images confirmed quite planar surfaces, at low scale, with limited roughness. Membranes with high hydrogen permeability and good selectivity for the gas pairs H2/CH4 and H2/N2 were obtained. For H2/CO2, selectivity almost vanished after thermal rearrangement. In all cases, their hydrogen permeability increased with increasing loads of PPN until around 30% PPN with ulterior fairly abrupt decreasing of permeability for all gases studied. Thermal rearrangement of the MMMs resulted in higher permeabilities but lower selectivities. For all the membranes and gas pairs studied, the balance of permeability vs. selectivity surpassed the 1991 Robeson’s upper bound, and approached or even exceeded the 2008 line, for MMMs having 30% PPN loads. In all cases, the HPA-MMMs before thermal rearrangement provided good selectivity versus permeability compromise, similar to their thermally rearranged counterparts but in the zone of high selectivity. For H2/CH4, H2/N2, these nonthermally rearranged MMMs approach the 2008 Robeson’s upper bound while H2/CO2 gives selective transport favoring H2 on the 1991 Robeson’s bound. Thus, attending to the energy cost of thermal rearrangement, it could be avoided in some cases especially when high selectivity is the target rather than high permeability.

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