scholarly journals Novel Cellulose Triacetate (CTA)/Cellulose Diacetate (CDA) Blend Membranes Enhanced by Amine Functionalized ZIF-8 for CO2 Separation

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2946
Author(s):  
Ayesha Raza ◽  
Susilo Japip ◽  
Can Zeng Liang ◽  
Sarah Farrukh ◽  
Arshad Hussain ◽  
...  
Keyword(s):  
Natural Gas ◽  
High Performance ◽  
Cellulose Triacetate ◽  
Mixed Matrix Membranes ◽  
Co2 Separation ◽  
Separation Performance ◽  
Zeolitic Imidazolate Frameworks ◽  
Mixed Gas ◽  
Cellulose Diacetate ◽  
Amine Functionalized

Currently, cellulose acetate (CA) membranes dominate membrane-based CO2 separation for natural gas purification due to their economical and green nature. However, their lower CO2 permeability and ease of plasticization are the drawbacks. To overcome these weaknesses, we have developed high-performance mixed matrix membranes (MMMs) consisting of cellulose triacetate (CTA), cellulose diacetate (CDA), and amine functionalized zeolitic imidazolate frameworks (NH2-ZIF-8) for CO2 separation. The NH2-ZIF-8 was chosen as a filler because (1) its pore size is between the kinetic diameters of CO2 and CH4 and (2) the NH2 groups attached on the surface of NH2-ZIF-8 have good affinity with CO2 molecules. The incorporation of NH2-ZIF-8 in the CTA/CDA blend matrix improved both the gas separation performance and plasticization resistance. The optimized membrane containing 15 wt.% of NH2-ZIF-8 had a CO2 permeability of 11.33 Barrer at 35 °C under the trans-membrane pressure of 5 bar. This is 2-fold higher than the pristine membrane, while showing a superior CO2/CH4 selectivity of 33. In addition, the former had 106% higher CO2 plasticization resistance of up to about 21 bar and an impressive mixed gas CO2/CH4 selectivity of about 40. Therefore, the newly fabricated MMMs based on the CTA/CDA blend may have great potential for CO2 separation in the natural gas industry.

scholarly journals Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 582
Author(s):  
Fernando Pardo ◽  
Sergio V. Gutiérrez-Hernández ◽  
Carolina Hermida-Merino ◽  
João M. M. Araújo ◽  
Manuel M. Piñeiro ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Gas Separation ◽  
Value Added ◽  
Gas Permeation ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Gas ◽  
Neat Polymer ◽  
Stable Suspension ◽  
Base Polymer

Membrane technology can play a very influential role in the separation of the constituents of HFC refrigerant gas mixtures, which usually exhibit azeotropic or near-azeotropic behavior, with the goal of promoting the reuse of value-added compounds in the manufacture of new low-global warming potential (GWP) refrigerant mixtures that abide by the current F-gases regulations. In this context, the selective recovery of difluorometane (R32, GWP = 677) from the commercial blend R410A (GWP = 1924), an equimass mixture of R32 and pentafluoroethane (R125, GWP = 3170), is sought. To that end, this work explores for the first time the separation performance of novel mixed-matrix membranes (MMMs) functionalized with ioNanofluids (IoNFs) consisting in a stable suspension of exfoliated graphene nanoplatelets (xGnP) into a fluorinated ionic liquid (FIL), 1-ethyl-3-methylpyridinium perfluorobutanesulfonate ([C2C1py][C4F9SO3]). The results show that the presence of IoNF in the MMMs significantly enhances gas permeation, yet at the expense of slightly decreasing the selectivity of the base polymer. The best results were obtained with the MMM containing 40 wt% IoNF, which led to an improved permeability of the gas of interest (PR32 = 496 barrer) with respect to that of the neat polymer (PR32 = 279 barrer) with a mixed-gas separation factor of 3.0 at the highest feed R410A pressure tested. Overall, the newly fabricated IoNF-MMMs allowed the separation of the near-azeotropic R410A mixture to recover the low-GWP R32 gas, which is of great interest for the circular economy of the refrigeration sector.

On the chemical filler–polymer interaction of nano- and micro-sized ZIF-11 in PBI mixed matrix membranes and their application for H2/CO2 separation

2016 ◽  
Vol 4 (37) ◽  
pp. 14334-14341 ◽  
Author(s):  
Javier Sánchez-Laínez ◽  
Beatriz Zornoza ◽  
Carlos Téllez ◽  
Joaquín Coronas
Keyword(s):  
Polymer Matrix ◽  
Mixed Matrix Membranes ◽  
Co2 Separation ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Polymer Interactions ◽  
Polymer Interaction ◽  
Matrix Membranes

A study of the chemical filler–polymer interactions of micro- and nano-sized ZIF-11 in PBI polymer matrix and H2/CO2 separation performance.

scholarly journals Role of Amine Type in CO2 Separation Performance within Amine Functionalized Silica/Organosilica Membranes: A Review

2018 ◽  
Vol 8 (7) ◽  
pp. 1032 ◽  
Author(s):  
Liang Yu ◽  
Masakoto Kanezashi ◽  
Hiroki Nagasawa ◽  
Toshinori Tsuru
Keyword(s):  
Co2 Separation ◽  
Separation Performance ◽  
Functionalized Silica ◽  
Amine Functionalized

scholarly journals CeO2-Blended Cellulose Triacetate Mixed-Matrix Membranes for Selective CO2 Separation

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 632 ◽  
Author(s):  
Chhabilal Regmi ◽  
Saeed Ashtiani ◽  
Zdeněk Sofer ◽  
Zdeněk Hrdlička ◽  
Filip Průša ◽  
...  
Keyword(s):  
Gas Permeability ◽  
Chemical Properties ◽  
Cellulose Triacetate ◽  
Ceo2 Nanoparticles ◽  
Mixed Matrix Membranes ◽  
Co2 Separation ◽  
Mixed Matrix ◽  
High Affinity ◽  
Physico Chemical ◽  
Carbon Dioxide Co2

Due to the high affinity of ceria (CeO2) towards carbon dioxide (CO2) and the high thermal and mechanical properties of cellulose triacetate (CTA) polymer, mixed-matrix CTA-CeO2 membranes were fabricated. A facile solution-casting method was used for the fabrication process. CeO2 nanoparticles at concentrations of 0.32, 0.64 and 0.9 wt.% were incorporated into the CTA matrix. The physico-chemical properties of the membranes were evaluated by SEM-EDS, XRD, FTIR, TGA, DSC and strain-stress analysis. Gas sorption and permeation affinity were evaluated using different single gases. The CTA-CeO2 (0.64) membrane matrix showed a high affinity towards CO2 sorption. Almost complete saturation of CeO2 nanoparticles with CO2 was observed, even at low pressure. Embedding CeO2 nanoparticles led to increased gas permeability compared to pristine CTA. The highest gas permeabilities were achieved with 0.64 wt.%, with a threefold increase in CO2 permeability as compared to pristine CTA membranes. Unwanted aggregation of the filler nanoparticles was observed at a 0.9 wt.% concentration of CeO2 and was reflected in decreased gas permeability compared to lower filler loadings with homogenous filler distributions. The determined gas selectivity was in the order CO2/CH4 > CO2/N2 > O2/N2 > H2/CO2 and suggests the potential of CTA-CeO2 membranes for CO2 separation in flue/biogas applications.

High-performance ultrathin mixed-matrix membranes based on an adhesive PGMA-co-POEM comb-like copolymer for CO2 capture

2019 ◽  
Vol 7 (24) ◽  
pp. 14723-14731 ◽  
Author(s):  
Na Un Kim ◽  
Byeong Ju Park ◽  
Jae Hun Lee ◽  
Jong Hak Kim
Keyword(s):  
Co2 Capture ◽  
High Performance ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Matrix Membranes

High-performance membranes are prepared based on UiO-66-NH2 nanoparticles dispersed in an adhesive PGMA-co-POEM comb-like copolymer. The membranes show excellent separation performance (CO2 permeance of 1320 GPU and CO2/N2 selectivity of 30.8).

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