Mixed matrix membranes for post-combustion carbon capture: From materials design to membrane engineering

Hu, Leiqing; Clark, Krysta; Alebrahim, Taliehsadat; Lin, Haiqing

doi:10.1016/j.memsci.2021.120140

Cited by 40 publications

(26 citation statements)

References 248 publications

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“…Polyethers exhibit excellent CO 2 /N 2 separation properties because of the affinity of polar ether oxygens toward CO 2 (generating high CO 2 /N 2 solubility selectivity) and excellent chain flexibility (inducing high CO 2 diffusivity). ,− For example, amorphous cross-linked poly(ethylene oxide) (XLPEO) were synthesized from 80 mass % polyethylene glycol methyl ether acrylate (PEGMEA) and 20 mass % polyethylene glycol diacrylate (PEGDA) and exhibited CO 2 permeability of 600 Barrer [1 Barrer = 10 –10 cm 3 (STP) cm cm –2 s –1 cmHg –1 ] and CO 2 /N 2 selectivity of 51 at 35 °C . Furthermore, XLPEO can be blended with plasticizers to improve CO 2 permeability. − For example, incorporation of 60 mass% 18-crown-6 (C6) into XLPEO increased CO 2 permeability by 120% to 1340 Barrer while retaining CO 2 /N 2 selectivity of ≈48.…”

Section: Introductionmentioning

confidence: 99%

Carbon Capture Membranes Based on Amorphous Polyether Nanofilms Enabled by Thickness Confinement and Interfacial Engineering

Zhang¹,

Bui²,

Yin

et al. 2023

ACS Appl. Mater. Interfaces

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Thin-film composite membranes are a leading technology for post-combustion carbon capture, and the key challenge is to fabricate defect-free selective nanofilms as thin as possible (100 nm or below) with superior CO 2 /N 2 separation performance. Herein, we developed high-performance membranes based on an unusual choice of semi-crystalline blends of amorphous poly(ethylene oxide) (aPEO) and 18-crown-6 (C6) using two nanoengineering strategies. First, the crystallinity of the nanofilms decreases with decreasing thickness and completely disappears at 500 nm or below because of the thickness confinement. Second, polydimethylsiloxane is chosen as the gutter layer between the porous support and selective layer, and its surface is modified with bio-adhesive polydopamine (<10 nm) with an affinity toward aPEO, enabling the formation of the thin, defect-free, amorphous aPEO/C6 layer. For example, a 110 nm film containing 40 mass % C6 in aPEO exhibits CO 2 permeability of 900 Barrer (much higher than a thick film with 420 Barrer), rendering a membrane with a CO 2 permeance of 2200 GPU and CO 2 /N 2 selectivity of 27 at 35 °C, surpassing Robeson's upper bound. This work shows that engineering at the nanoscale plays an important role in designing highperformance membranes for practical separations.

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Section: Introductionmentioning

confidence: 99%

Carbon Capture Membranes Based on Amorphous Polyether Nanofilms Enabled by Thickness Confinement and Interfacial Engineering

Zhang¹,

Bui²,

Yin

et al. 2023

ACS Appl. Mater. Interfaces

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“…Various methods can be used to counteract the incompatibility and pore blockage challenges such as through careful material selection consideration between the polymer matrix and MOF filler since performance improvements are only present when the polymer-filler compatibility is achieved [ 106 ]. Besides that, the incorporation of amine-functionalized groups into organic MOF linkers increases compatibility due to the presence of more hydrogen bonding with the hydroxyl groups present in polymer interface [ 79 , 107 ].…”

Section: Challenges In Development Of Amine-functionalized Metal-orga...mentioning

confidence: 99%

Development of Amine-Functionalized Metal-Organic Frameworks Hollow Fiber Mixed Matrix Membranes for CO2 and CH4 Separation: A Review

et al. 2022

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CO2 separation from raw natural gas can be achieved through the use of the promising membrane-based technology. Polymeric membranes are a known method for separating CO2 but suffer from trade-offs between its permeability and selectivity. Therefore, through the use of mixed matrix membranes (MMMs) which utilizes inorganic or hybrid fillers such as metal-organic frameworks (MOFs) in polymeric matrix, the permeability and selectivity trade-off can be overcome and possibly surpass the Robeson Upper Bounds. In this study, various types of MOFs are explored in terms of its structure and properties such as thermal and chemical stability. Next, the use of amine and non-amine functionalized MOFs in MMMs development are compared in order to investigate the effects of amine functionalization on the membrane gas separation performance for flat sheet and hollow fiber configurations as reported in the literature. Moreover, the gas transport properties and various challenges faced by hollow fiber mixed matrix membranes (HFMMMs) are discussed. In addition, the utilization of amine functionalization MOF for mitigating the challenges faced is included. Finally, the future directions of amine-functionalized MOF HFMMMs are discussed for the fields of CO2 separation.

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“…Although it is well known that polymeric membranes are currently employed [ 9 , 10 , 11 , 12 ], zeolite membranes exhibit excellent dehydration performance. FAU, DDR, AEI, and CHA-type zeolite membranes show high CO 2 separation performance [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Estimation of CO2 Separation Performances through CHA-Type Zeolite Membranes Using Molecular Simulation

et al. 2023

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Chabazite (CHA)-type zeolite membranes are a potential material for CO2 separations because of their small pore aperture, large pore volume, and low aluminum content. In this study, the permeation and separation properties were evaluated using a molecular simulation technique with a focus on improving the CO2 separation performance. The adsorption isotherms of CO2 and CH4 on CHA-type zeolite with Si/Al = 18.2 were predicted by grand canonical Monte Carlo, and the diffusivities in zeolite micropores were simulated by molecular dynamics. The CO2 separation performance of the CHA-type zeolite membrane was estimated by a Maxwell–Stefan equation, accounting for mass transfer through the support tube. The results indicated that the permeances of CO2 and CH4 were influenced mainly by the porosity of the support, with the CO2 permeance reduced due to preferential adsorption with increasing pressure drop. In contrast, it was important for estimation of the CH4 permeance to predict the amounts of adsorbed CH4. Using molecular simulation and the Maxwell–Stefan equation is shown to be a useful technique for estimating the permeation properties of zeolite membranes, although some problems such as predicting accurate adsorption terms remain.

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Mixed matrix membranes for post-combustion carbon capture: From materials design to membrane engineering

Cited by 40 publications

References 248 publications

Carbon Capture Membranes Based on Amorphous Polyether Nanofilms Enabled by Thickness Confinement and Interfacial Engineering

Carbon Capture Membranes Based on Amorphous Polyether Nanofilms Enabled by Thickness Confinement and Interfacial Engineering

Development of Amine-Functionalized Metal-Organic Frameworks Hollow Fiber Mixed Matrix Membranes for CO2 and CH4 Separation: A Review

Estimation of CO2 Separation Performances through CHA-Type Zeolite Membranes Using Molecular Simulation

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