New sterically hindered polyvinylamine membranes for CO2 separation and capture

Tong, Zi; Ho, W.S. Winston

doi:10.1016/j.memsci.2017.08.057

Cited by 80 publications

(41 citation statements)

References 39 publications

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“…Herein, the Robeson upper bound was plotted in the term of permeance rather than permeability by assuming a membrane thickness of 500 nm, due in large part to the difficulties in accurate determination of the thickness of very thin organosilica selective layer with interpenetrations into a nanoporous sublayer and due in part to the typical thickness of organosilica membranes that are estimated to range from 200 to 600 nm, as discussed elsewhere [23,24]. This implies that the hindered amines showed a greater advantage in facilitating CO2 transport through amine-functionalized silica-based membranes (based on single gas permeation test), consistent with the results observed (based on binary gas separation test) by Prof. Ho's group (see Figure 2) [18][19][20]. Therefore, these results suggested that the amine type could play a coincidental role in CO2 transport behaviors for either single or binary/mixed gas systems, given that the differences between single and mixed gas separation performance can be generally observed due to the competitive adsorption/interaction.…”

Section: Gas Permeation Propertiesmentioning

confidence: 86%

“…Theoretically, this phenomenon could offer innovations for the design and development of amine-containing CO 2 separation membranes that integrate CO 2 adsorption, diffusion, and desorption processes into a thin membrane layer. Indeed, Prof. Ho's group developed and studied a series of CO 2 -selective polymeric membranes containing sterically hindered polyamines [18][19][20]. They found that the steric hindrance effect of polyamines could significantly promote CO 2 transport performance in both CO 2 permeability and CO 2 /gas (gas = H 2 , N 2 ) selectivity, and this trend was more distinct in the case of moderately hindered polyamines (see Figure 2) [18].…”

mentioning

confidence: 99%

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

Kanezashi

Nagasawa

et al. 2018

Applied Sciences

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Abstract:Various types of amine-functionalized silica/organosilica membranes have been developed due to their potentially superior CO 2 separation performance. This article reviews the progress made in this field and special attention is paid to elucidating the role of amine type in CO 2 separation performance within amine-functionalized silica/organosilica membranes. This review includes a systematic comparison of various organosilica membranes with either unhindered or sterically hindered amines developed in our previous studies. Herein, we thoroughly discuss the structural characterizations and CO 2 adsorption/desorption properties of amine-functionalized xerogel powders and CO 2 transport/separation performance across the relevant membranes. Future directions for the design and development of high-performance CO 2 separation membranes are suggested, and particular attention is paid to the future of activation energies for gas permeation.

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Section: Gas Permeation Propertiesmentioning

confidence: 86%

mentioning

confidence: 99%

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

Kanezashi

Nagasawa

et al. 2018

Applied Sciences

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“…Thanks to its hydrophilicity and high amount of amine moieties, PVAm presented good separation performances in various conditions [43][44][45]. In presence of water, these amine groups are able to interact with CO 2 [31]. Moreover, as presented in the mechanisms above, the amine groups can also play the role of catalyst in the CO 2 hydration reaction [46].…”

Section: Introductionmentioning

confidence: 93%

“…For CO 2 separation, amine moieties represent a quite reasonable choice as carriers which was exploited in several works [26][27][28][29][30]. The mechanism, which regulates the interaction between aminated molecules and CO 2 , is not yet completely understood, even though two main reactions are commonly considered to occur within the matrix [30][31][32]. When unhindered amines are present, carbon dioxide tends to form a carbamate ion through a zwitterion mechanism, a pathway originally described by Caplow [33] and presented in Figure 1a.…”

Section: Introductionmentioning

confidence: 99%

“…To tackle this instability issue, recent research has been focused on fixed site carrier (FSC) membranes. These membranes have functional carriers that are covalently bonded to the matrix polymer backbone or to a dispersed secondary phase restricting their mobility but drastically improving the membrane stability [21,31,36]. Both approaches showed strengths and weaknesses: small mobile carriers tend to leak and evaporate, while fixed carriers can struggle to achieve the same diffusion rates due to their lack of mobility.…”

Section: Introductionmentioning

confidence: 99%

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Crosslinked Facilitated Transport Membranes Based on Carboxymethylated NFC and Amine-Based Fixed Carriers for Carbon Capture, Utilization, and Storage Applications

Dhuiège¹,

Lasseuguette

Brochier-Salon

et al. 2020

Applied Sciences

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Herein, we report the performances of crosslinked facilitated transport membranes based on carboxymethylated nanofibrils of cellulose (cmNFC) and polyvinylamine (PVAm) with the use of 3-(2-Aminoethylamino) propyltrimethoxysilane (AEAPTMS) as second fixed carrier for CO2 selectivity and permeability. The grafting of AEAPTMS on cmNFC was optimized by following the hydrolysis/condensation kinetics by 29Si Nuclear Magnetic Resonance (NMR) analyses and two different strategies of the process of membrane production were investigated. In optimized conditions, around 25% of the -COOH functions from cmNFC have crosslinked with PVAm. The crosslinked membranes were less sensitive to liquid water and the crystallinity of PVAm was tuned by the conditions of the membrane elaboration. In both processes, CO2 selectivity and permeability were enhanced especially at high water vapor concentration by the use of PVAm and AEAPTMS suggesting the existence of a facilitation effect due to amine-CO2 interaction, while the mechanical integrity of the swollen membranes remained intact.

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Unobstructed Ultrathin Gas Transport Channels in Composite Membranes by Interfacial Self‐Assembly

Wang

Qiao

et al. 2020

Advanced Materials

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effective approach to greatly improve gas separation performance of MMMs.Recently, rigid microporous polymer membranes with high FFV and good interface compatibility, acting as highspeed gas transport channels, have been under intense research interest for gas separation, [3] but it is difficult to realize large-area fabrication and large-scale applications with some of these complex polymer structures. Similarly, very few MMMs have been fabricated having gas transport channels through the gas selective skin layer of the membrane. Wang and co-workers [4] fabricated high-speed vertically aligned montmorillonite gas transport channels as the selective skin layer of MMMs for CO 2 separations. However, the structural adjustability of the gas-selective porous materials is limited, and multistep MMM fabrication procedures are somewhat complicated.Many porous materials are investigated as dispersed phases, such as zeolites, metal-organic frameworks (MOFs), [5] and covalent organic frameworks (COFs). [6] Among these, MOFs have several advantages such as uniform and highly porous structures, large surface areas, tunable pore channels and controllable properties. Using MOFs as fillers, the interfacial compatibility and morphology between filler particles and polymer matrix can be controlled more easily due to the presence of organic ligands with a broad variety of functionalities on the MOF structures. This superior affinity and compatibility of MOFs with polymer chains make them outstanding fillers to increase gas separation performance of MMMs.To the best of our knowledge, using MOFs as unobstructed and direct gas transport channels through MMMs has rarely Ultrathin unobstructed gas transport channels through the membrane selective layer are constructed in mixed matrix membranes (MMMs) by using gravity-induced interface self-assembly of poly(vinylamine) and polymermodified MIL-101(Cr). For CO 2 /N 2 (15/85 by volume) mixed gas, the MMMs achieve a high CO 2 permeance of 823 gas permeation units and CO 2 /N 2 selectivity of 242 at 0.5 MPa. Based on economic analyses, a two-stage membrane process can achieve gas separation and economic targets.Membrane technology has many advantages, such as operational simplicity, lower energy requirements and environmental friendliness, which have enabled significant commercial advances in the field of gas separation. [1] Mixed matrix membranes (MMMs) are of interest in gas separation applications because they combine the advantages of polymeric dense membranes, such as inexpensive large-scale fabrication, with filler materials of defined pore sizes, allowing high gas permeance and permselectivity to be achieved simultaneously. In many MMMs, porous filler materials are deployed as the dispersed phase within a continuous polymer phase. [2] Currently, most porous materials used in MMMs are encapsulated by polymer matrix, and the filler acts to disrupt regular polymer chain packing, leading to an increase in fractional free volume (FFV) and a decrease in crystallinity. Thus, gas separatio...

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New sterically hindered polyvinylamine membranes for CO2 separation and capture

Cited by 80 publications

References 39 publications

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

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

Crosslinked Facilitated Transport Membranes Based on Carboxymethylated NFC and Amine-Based Fixed Carriers for Carbon Capture, Utilization, and Storage Applications

Unobstructed Ultrathin Gas Transport Channels in Composite Membranes by Interfacial Self‐Assembly

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