Covalent triazine framework CTF-fluorene as porous filler material in mixed matrix membranes for CO2/CH4 separation

2021 ◽  
Vol 316 ◽  
pp. 110941
Author(s):  
Stefanie Bügel ◽  
Alex Spieß ◽  
Christoph Janiak
Keyword(s):  
Filler Material ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Porous Filler ◽  
Covalent Triazine Framework ◽  
Matrix Membranes

scholarly journals Biphenyl-Based Covalent Triazine Framework/Matrimid® Mixed-Matrix Membranes for CO2/CH4 Separation

Membranes ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 795
Author(s):  
Stefanie Bügel ◽  
Quang-Dien Hoang ◽  
Alex Spieß ◽  
Yangyang Sun ◽  
Shanghua Xing ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Filler Material ◽  
Mixed Matrix Membranes ◽  
Filler Materials ◽  
Mixed Matrix ◽  
Mixed Gas ◽  
Biogas Upgrading ◽  
Current Topic ◽  
Covalent Triazine Framework ◽  
Matrix Membranes

Processes, such as biogas upgrading and natural gas sweetening, make CO2/CH4 separation an environmentally relevant and current topic. One way to overcome this separation issue is the application of membranes. An increase in separation efficiency can be achieved by applying mixed-matrix membranes, in which filler materials are introduced into polymer matrices. In this work, we report the covalent triazine framework CTF-biphenyl as filler material in a matrix of the glassy polyimide Matrimid®. MMMs with 8, 16, and 24 wt% of the filler material are applied for CO2/CH4 mixed-gas separation measurements. With a CTF-biphenyl loading of only 16 wt%, the CO2 permeability is more than doubled compared to the pure polymer membrane, while maintaining the high CO2/CH4 selectivity of Matrimid®.

A new permeation model in porous filler–based mixed matrix membranes for CO 2 separation

2019 ◽  
Vol 9 (4) ◽  
pp. 719-742 ◽  
Author(s):  
Mohammad Mehdi Moftakhari Sharifzadeh ◽  
Mona Zamani Pedram ◽  
Abtin Ebadi Amooghin
Keyword(s):  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Porous Filler ◽  
Matrix Membranes

scholarly journals Investigation of Azo-cop-2 as a Photo-responsive Low-energy Co2 Adsorbent and Porous Filler in Mixed Matrix Membranes for Co2/N2 Separation

2019 ◽  
Author(s):  
Siyao Li ◽  
Nicholaus Prasetya ◽  
Bradley Ladewig
Keyword(s):  
Uv Light ◽  
Low Energy ◽  
Polymeric Membrane ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Porous Filler ◽  
Excellent Candidate ◽  
Co2 Adsorbent ◽  
Matrix Membranes

<b>Abstract</b><div>As a nanoporous polymer, Azo-COP-2 has been reported for having exceptional CO<sub>2</sub>/N<sub>2</sub> separation performance. In this study, we further investigate the application of Azo-COP-2 as a potential for low-energy CO<sub>2</sub> adsorbent and porous filler in mixed matrix membranes for CO<sub>2</sub>/N<sub>2</sub> separation. As an adsorbent, thanks to the presence of azobenzene in its framework, Azo-COP-2 showed lower CO<sub>2</sub> uptake when irradiated with UV light than its normal condition. Azo-COP-2 also exhibited a highly efficient CO<sub>2</sub> photoswitching between its irradiated and non-irradiated state that has not been observed previously in any nanoporous polymer. Combined with high CO<sub>2</sub>/N<sub>2</sub> selectivity, this property renders Azo-COP-2 to be an excellent candidate for low-energy CO<sub>2</sub> capture. A beneficial property was also exhibited by Azo-COP-2 once they were used as porous filler in mixed-matrix membranes (MMMs) using three different polymer matrices: Matrimid, polysulfone and PIM-1. Both permeability and selectivity of the MMMs could be simultaneously improved once ideal interaction between Azo-COP-2 and the polymer could be established. It was found that Azo-COP-2 – polysulfone composites had the best performance. In this case, it was observed that the CO<sub>2</sub> permeability and CO2/N2 selectivity could be increased up to 160% and 66.7%, respectively. The strategy then shows the great potential of Azo-COP-2 not only for an advanced low-energy CO<sub>2</sub> adsorbent but also to improve the performance of conventional polymeric membrane for CO<sub>2</sub> post-combustion capture.<br></div>

scholarly journals CO2/CH4 and He/N2 Separation Properties and Water Permeability Valuation of Mixed Matrix MWCNTs-Based Cellulose Acetate Flat Sheet Membranes: A Study of the Optimization of the Filler Material Dispersion Method

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 280
Author(s):  
Tobias Esser ◽  
Tobias Wolf ◽  
Tim Schubert ◽  
Jan Benra ◽  
Stefan Forero ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Cellulose Acetate ◽  
Water Permeability ◽  
Filler Material ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Feed Concentration ◽  
Water Permeation ◽  
Cellulose Acetate Membranes ◽  
Matrix Membranes

The main scope of this work is to develop nano-carbon-based mixed matrix cellulose acetate membranes (MMMs) for the potential use in both gas and liquid separation processes. For this purpose, a variety of mixed matrix membranes, consisting of cellulose acetate (CA) polymer and carbon nanotubes as additive material were prepared, characterized, and tested. Multi-walled carbon nanotubes (MWCNTs) were used as filler material and diacetone alcohol (DAA) as solvent. The first main objective towards highly efficient composite membranes was the proper preparation of agglomerate-free MWCNTs dispersions. Rotor-stator system (RS) and ultrasonic sonotrode (USS) were used to achieve the nanofillers’ dispersion. In addition, the first results of the application of the three-roll mill (TRM) technology in the filler dispersion achieved were promising. The filler material, MWCNTs, was characterized by scanning electron microscopy (SEM) and liquid nitrogen (LN2) adsorption-desorption isotherms at 77 K. The derivatives CA-based mixed matrix membranes were characterized by tensile strength and water contact angle measurements, impedance spectroscopy, gas permeability/selectivity measurements, and water permeability tests. The studied membranes provide remarkable water permeation properties, 12–109 L/m2/h/bar, and also good separation factors of carbon dioxide and helium separations. Specifically, a separation factor of 87 for 10% He/N2 feed concentration and a selectivity value of 55.4 for 10% CO2/CH4 feed concentration were achieved.

scholarly journals Investigation of Azo-cop-2 as a Photo-responsive Low-energy Co2 Adsorbent and Porous Filler in Mixed Matrix Membranes for Co2/N2 Separation

2019 ◽  
Author(s):  
Siyao Li ◽  
Nicholaus Prasetya ◽  
Bradley Ladewig
Keyword(s):  
Uv Light ◽  
Low Energy ◽  
Polymeric Membrane ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Porous Filler ◽  
Excellent Candidate ◽  
Co2 Adsorbent ◽  
Matrix Membranes

<b>Abstract</b><div>As a nanoporous polymer, Azo-COP-2 has been reported for having exceptional CO<sub>2</sub>/N<sub>2</sub> separation performance. In this study, we further investigate the application of Azo-COP-2 as a potential for low-energy CO<sub>2</sub> adsorbent and porous filler in mixed matrix membranes for CO<sub>2</sub>/N<sub>2</sub> separation. As an adsorbent, thanks to the presence of azobenzene in its framework, Azo-COP-2 showed lower CO<sub>2</sub> uptake when irradiated with UV light than its normal condition. Azo-COP-2 also exhibited a highly efficient CO<sub>2</sub> photoswitching between its irradiated and non-irradiated state that has not been observed previously in any nanoporous polymer. Combined with high CO<sub>2</sub>/N<sub>2</sub> selectivity, this property renders Azo-COP-2 to be an excellent candidate for low-energy CO<sub>2</sub> capture. A beneficial property was also exhibited by Azo-COP-2 once they were used as porous filler in mixed-matrix membranes (MMMs) using three different polymer matrices: Matrimid, polysulfone and PIM-1. Both permeability and selectivity of the MMMs could be simultaneously improved once ideal interaction between Azo-COP-2 and the polymer could be established. It was found that Azo-COP-2 – polysulfone composites had the best performance. In this case, it was observed that the CO<sub>2</sub> permeability and CO2/N2 selectivity could be increased up to 160% and 66.7%, respectively. The strategy then shows the great potential of Azo-COP-2 not only for an advanced low-energy CO<sub>2</sub> adsorbent but also to improve the performance of conventional polymeric membrane for CO<sub>2</sub> post-combustion capture.<br></div>

scholarly journals Investigation of Azo-cop-2 as a Photo-responsive Low-energy Co2 Adsorbent and Porous Filler in Mixed Matrix Membranes for Co2/N2 Separation

2019 ◽  
Author(s):  
Siyao Li ◽  
Nicholaus Prasetya ◽  
Bradley Ladewig
Keyword(s):  
Uv Light ◽  
Low Energy ◽  
Polymeric Membrane ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Porous Filler ◽  
Excellent Candidate ◽  
Co2 Adsorbent ◽  
Matrix Membranes

<b>Abstract</b><div>As a nanoporous polymer, Azo-COP-2 has been reported for having exceptional CO<sub>2</sub>/N<sub>2</sub> separation performance. In this study, we further investigate the application of Azo-COP-2 as a potential for low-energy CO<sub>2</sub> adsorbent and porous filler in mixed matrix membranes for CO<sub>2</sub>/N<sub>2</sub> separation. As an adsorbent, thanks to the presence of azobenzene in its framework, Azo-COP-2 showed lower CO<sub>2</sub> uptake when irradiated with UV light than its normal condition. Azo-COP-2 also exhibited a highly efficient CO<sub>2</sub> photoswitching between its irradiated and non-irradiated state that has not been observed previously in any nanoporous polymer. Combined with high CO<sub>2</sub>/N<sub>2</sub> selectivity, this property renders Azo-COP-2 to be an excellent candidate for low-energy CO<sub>2</sub> capture. A beneficial property was also exhibited by Azo-COP-2 once they were used as porous filler in mixed-matrix membranes (MMMs) using three different polymer matrices: Matrimid, polysulfone and PIM-1. Both permeability and selectivity of the MMMs could be simultaneously improved once ideal interaction between Azo-COP-2 and the polymer could be established. It was found that Azo-COP-2 – polysulfone composites had the best performance. In this case, it was observed that the CO<sub>2</sub> permeability and CO2/N2 selectivity could be increased up to 160% and 66.7%, respectively. The strategy then shows the great potential of Azo-COP-2 not only for an advanced low-energy CO<sub>2</sub> adsorbent but also to improve the performance of conventional polymeric membrane for CO<sub>2</sub> post-combustion capture.<br></div>

Long-Term Stable Metal Organic Framework (MOF) Based Mixed Matrix Membranes for Ultrafiltration

2020 ◽  
Author(s):  
Muayad Al-shaeli ◽  
Stefan J. D. Smith ◽  
Shanxue Jiang ◽  
Huanting Wang ◽  
Kaisong Zhang ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Mixed Matrix Membranes ◽  
Recovery Ratio ◽  
Mixed Matrix ◽  
Water Contact ◽  
Membrane Performance ◽  
Metal Organic ◽  
Matrix Membranes

<p>In this study, novel <a>mixed matrix polyethersulfone (PES) membranes</a> were synthesized by using two different kinds of metal organic frameworks (MOFs), namely UiO-66 and UiO-66-NH<sub>2</sub>. The composite membranes were characterised by SEM, EDX, FTIR, PXRD, water contact angle, porosity, pore size, etc. Membrane performance was investigated by water permeation flux, flux recovery ratio, fouling resistance and anti-fouling performance. The stability test was also conducted for the prepared mixed matrix membranes. A higher reduction in the water contact angle was observed after adding both MOFs to the PES and sulfonated PES membranes compared to pristine PES membranes. An enhancement in membrane performance was observed by embedding the MOF into PES membrane matrix, which may be attributed to the super-hydrophilic porous structure of UiO-66-NH<sub>2</sub> nanoparticles and hydrophilic structure of UiO-66 nanoparticles that could accelerate the exchange rate between solvent and non-solvent during the phase inversion process. By adding the MOFs into PES matrix, the flux recovery ratio was increased greatly (more than 99% for most mixed matrix membranes). The mixed matrix membranes showed higher resistance to protein adsorption compared to pristine PES membranes. After immersing the membranes in water for 3 months, 6 months and 12 months, both MOFs were stable and retained their structure. This study indicates that UiO-66 and UiO-66-NH<sub>2</sub> are great candidates for designing long-term stable mixed matrix membranes with higher anti-fouling performance.</p>

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