Water vapor and CO2 transport through amine-containing facilitated transport membranes

Tong, Zi; Vakharia, Varun; Gasda, Michael; Ho, W.S. Winston

doi:10.1016/j.reactfunctpolym.2014.09.010

Cited by 46 publications

(12 citation statements)

References 25 publications

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“…This is in line with the results of Lin et al who found that only 30% resistance is from the active Pebax layer and 70% resistance is mainly due to the composite support [9]. Tong et al varied the support layer thickness and found that mass transfer of the support layer is the controlling factor to water vapor transport [32]. This is due to the fact that the sweep gas is not in direct contact with the membrane as it is on the permeate side of the composite membrane.…”

Section: Water Vapor Permeation and Selectivitysupporting

confidence: 89%

Pebax®1657/Graphene oxide composite membranes for improved water vapor separation

Akhtar

Kumar

Peinemann

2017

Journal of Membrane Science

104

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In this study composite mixed matrix membranes containing hydrophilic microphaseseparated block copolymer (Pebax ® 1657) and graphene oxide nanosheets were prepared using a dip coating method. Water vapor and N 2 gas permeation were measured as a function of different parameters: (i) layer thickness, (ii) content of graphene oxide (GO), and (iii) content of reduced GO. Surprisingly, a concentration of only 2 wt% of GO nanosheets well dispersed in the Pebax layer boosted the selectivity 8 times by decreasing the water vapor permeance by only 12 % whereas N 2 gas permeance decreased by 70 %. Using reduced GO instead, the water vapor permeance declined by up to 16% with no influence on the N 2 gas permeance. We correlated the permeation properties of the mixed matrix membranes with different models and found, that both the modified Nielsen model and the Cussler model give good correlation with experimental findings.

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Section: Water Vapor Permeation and Selectivitysupporting

confidence: 89%

Pebax®1657/Graphene oxide composite membranes for improved water vapor separation

Akhtar

Kumar

Peinemann

2017

Journal of Membrane Science

104

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“…In the case of carbon dioxide separation, amine moieties represent a fairly reasonable choice which were exploited in several works [25,26,27,28,29]. The mechanism itself, which regulates the interaction between aminated molecules and CO 2 , is not completely understood, even though two main reactions are commonly considered to occur within the matrix [29,30]. When unhindered amines are present, carbon dioxide tends to form a carbamate ion through a zwitterion mechanism, a pathway originally described by Caplow [31] and presented in Equations (1) and (2): CO2+R−NH2⇌R−NH2+−COO−, R−NH2+−COO−+R−NH2⇌R−NH−COO−+R−NH3+.…”

Section: Introductionmentioning

confidence: 99%

“…These would dissolve on the upstream side and form complexes with the mobile carrier; as a unit, this complex would diffuse through the liquid and decomplex on the downstream side [33]. Another approach to this issue is represented by the use of fixed site carrier (FSC) membranes, where the functional groups are covalently bonded to the matrix polymeric backbone or a dispersed secondary phase and, rather than being free to move through the entire volume of it, their position is limited in the vicinity of an equilibrium point [24,30,34]. Both approaches were explored in research and both showed strengths and weaknesses; small mobile carriers tend to leak and evaporate [35], while fixed carriers can struggle to achieve the same diffusion rates due to lack of mobility.…”

Section: Introductionmentioning

confidence: 99%

Arginine/Nanocellulose Membranes for Carbon Capture Applications

Venturi

Chrysanthou

Dhuiège³

et al. 2019

Nanomaterials

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The present study investigates the influence of the addition of l-arginine to a matrix of carboxymethylated nanofibrillated cellulose (CMC-NFC), with the aim of fabricating a mobile carrier facilitated transport membrane for the separation of CO2. Self-standing films were prepared by casting an aqueous suspension containing different amounts of amino acid (15–30–45 wt.%) and CMC-NFC. The permeation properties were assessed in humid conditions (70–98% relative humidity (RH)) at 35 °C for CO2 and N2 separately and compared with that of the non-loaded nanocellulose films. Both permeability and ideal selectivity appeared to be improved by the addition of l-arginine, especially when high amino-acid loadings were considered. A seven-fold increment in carbon dioxide permeability was observed between pure CMC-NFC and the 45 wt.% blend (from 29 to 220 Barrer at 94% RH), also paired to a significant increase of ideal selectivity (from 56 to 185). Interestingly, while improving the separation performance, water sorption was not substantially affected by the addition of amino acid, thus confirming that the increased permeability was not related simply to membrane swelling. Overall, the addition of aminated mobile carriers appeared to provide enhanced performances, advancing the state of the art for nanocellulose-based gas separation membranes.

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“…H 2 O generally shows a high permeance in AFTMs 26 . The permeability of the membrane support layer is expected to be the controlling factor for H 2 O flux in AFTMs 60 . However, study of support layer is beyond the scope of our study.…”

Section: Case Study: Assessment Of Water Vapor Effects On Postcombustmentioning

confidence: 93%

Water vapor effects on CO₂ separation of amine‐containing facilitated transport membranes (AFTMs) module: mathematical modeling using tanks‐in‐series approach

et al. 2020

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Amine-containing facilitated transport membranes (AFTMs) are emerging membranes and have great potential for CO 2 capture. AFTMs are particularly suitable for humid flue gases, as water vapor enhances the facilitated transportation of CO 2. However, there is a lack of mathematical models available to evaluate the impact of water vapor on CO 2 separation performance for large-scale membrane modules. Therefore, developing a mathematical model considering the water vapor effects is of great importance to guide the large-scale applications of AFTMs for CO 2 capture. In this study, a mathematical model using tanks-in-series approach for CO 2 capture through AFTMs is proposed. In this model, the tanks-in-series approach can reflect the variable (water vapor-dependent) gas permeance along the membrane module. Modeling results showed the necessity of considering the effect of water vapor content decline along the module. In addition, both increasing temperature and pressure primarily lead to a faster decline of relative humidity (RH) along the membrane module, resulting in an increase of CO 2 recovery but a decrease of CO 2 product purity. For a gas stream with relatively low water vapor content (<2% in this study), different H 2 O permeance has a minor effect on separation performance. Moreover, permeate gas with higher water vapor content as well as higher RH is considered more suitable for further treatment of second stage membrane separation. In conclusion,

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Water vapor and CO2 transport through amine-containing facilitated transport membranes

Cited by 46 publications

References 25 publications

Pebax®1657/Graphene oxide composite membranes for improved water vapor separation

Pebax®1657/Graphene oxide composite membranes for improved water vapor separation

Arginine/Nanocellulose Membranes for Carbon Capture Applications

Water vapor effects on CO₂ separation of amine‐containing facilitated transport membranes (AFTMs) module: mathematical modeling using tanks‐in‐series approach

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Water vapor and CO2 transport through amine-containing facilitated transport membranes

Cited by 46 publications

References 25 publications

Pebax®1657/Graphene oxide composite membranes for improved water vapor separation

Pebax®1657/Graphene oxide composite membranes for improved water vapor separation

Arginine/Nanocellulose Membranes for Carbon Capture Applications

Water vapor effects on CO2 separation of amine‐containing facilitated transport membranes (AFTMs) module: mathematical modeling using tanks‐in‐series approach

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Water vapor effects on CO₂ separation of amine‐containing facilitated transport membranes (AFTMs) module: mathematical modeling using tanks‐in‐series approach