Adsorption behavior of CO2 on amine-functionalized polyacrylonitrile fiber

Kuang, Yizhu; He, Hui; Chen, Shuixia; Wu, Jingjie; Liu, Fenglei

doi:10.1007/s10450-019-00070-0

Cited by 29 publications

(14 citation statements)

References 22 publications

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“…4,5 In light of this, the CO 2 capture with aminefunctionalized solids, such as zeolites, active carbons, or a variety of porous inorganic materials, has come to the spotlight. 5 Various amines, such as diethylenetriamine, 6 tetraethylenepentamine, 7 propylamine, 8 and benzylamine, 9 were reported to be effective for CO 2 capture. A particular interest lies in impregnation of polyethylenimine (PEI) onto porous materials because PEI itself is a high-viscosity fluid, remaining on the support material even during the regeneration process at an elevated temperature.…”

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confidence: 99%

“…However, this method is not energy-efficient for capturing 415 ppm of CO 2 in the air, and losses of liquid amines jeopardize public health. , In light of this, the CO 2 capture with amine-functionalized solids, such as zeolites, active carbons, or a variety of porous inorganic materials, has come to the spotlight . Various amines, such as diethylenetriamine, tetraethylenepentamine, propylamine, and benzylamine, were reported to be effective for CO 2 capture. A particular interest lies in impregnation of polyethylenimine (PEI) onto porous materials because PEI itself is a high-viscosity fluid, remaining on the support material even during the regeneration process at an elevated temperature. − PEI can adsorb CO 2 at room temperature and release it in the temperature range between 70 and 100 °C, depending upon the loading amount of PEI. , Released and concentrated CO 2 can then be used as a raw material for fine chemical synthesis or can be mineralized as metal carbonates .…”

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confidence: 99%

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Toward Carbon Dioxide Capture from the Atmosphere: Lowering the Regeneration Temperature of Polyethylenimine-Based Adsorbents by Ionic Liquid

et al. 2021

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Industrial applications of solid adsorbents for direct capture of CO2 from the atmosphere require lowering the regeneration temperature (typically 80–100 °C) to save the energy and operation cost. The addition of ionic liquid (IL) to silica functionalized with polyethylenimine (PEI) was found to lower the temperature of CO2 desorption. Modulation excitation infrared spectroscopy evidenced that the presence of IL weakens the C–N bond in carbamate/carbamic acid species formed by reaction of amine groups of PEI and gaseous CO2 and, thus, facilitates the CO2 desorption at a low temperature. The newly developed PEI–IL composite adsorbent enabled a complete regeneration at 50 °C.

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confidence: 99%

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confidence: 99%

Toward Carbon Dioxide Capture from the Atmosphere: Lowering the Regeneration Temperature of Polyethylenimine-Based Adsorbents by Ionic Liquid

et al. 2021

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“…To evaluate the effect of modification temperature on the performance of PAN fabrics, the samples were modified by placing each sample in a modification bath for 2 h. 32 The bath consisted of 10% TETA solutions at various temperatures (90°C, 100°C, 110°C, or 120°C) and the liquor ratio was 10:1. Afterward, the TETA-functionalized PAN fabric was washed five times to remove any residue.…”

Section: Methodsmentioning

confidence: 99%

Graphene oxide-coated amino-modified polyacrylonitrile to fabricate highly conductive fabrics

Cao

Wang

Zhang

2021

Textile Research Journal

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Graphene conductive polyacrylonitrile (PAN) substrate is an important material, owing to its high strength, flexibility, and comfort. In this work, a PAN fabric was cationized with triethylene tetramine (TETA) for increased adsorption of anionic graphene oxide (GO), which mainly forms ionic bonds. The TETA-modified PAN (Amino-PAN) fabric was then treated with GO using a dipping method followed by in situ reduction of GO to obtain reduced graphene oxide (RGO). The electric conductivity of Amino-PAN fabrics was increased with the increasing of TETA modification temperature from 90°C to 110°C. A surface electric resistance of 0.61 kΩ cm−1 was obtained for 2 g L−1 GO and TETA modification performed at 110°C for 2 h. This resistance was considerably lower than that of the original PAN fabric for one cycle of the dipping–reduction GO treatment (1RGO-PAN, 42.69 kΩ cm−1) and six cycles of the dipping–reduction GO treatment (6RGO-PAN, 1.52 kΩ cm−1). The results revealed that the anionic GO was more easily adsorbed on the surface of the Amino-PAN fabrics than on the original PAN fabrics. The surface electric resistance of the 1RGO-Amino-PAN fabrics slightly increased from 0.61 to 0.79 kΩ cm−1 after 30 washing cycles. The results showed that the RGO-coated Amino-PAN fabric had excellent washability. Furthermore, the TETA modification process reduced the dipping–reduction times of the GO finishing PAN fabrics, and can be easily used in the production of RGO-based flexible conductive material.

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“…In this regard, solid adsorbents such as mesoporous oxides, zeolites, and metal-organic frameworks (MOFs) have recently gained attention due to their feasibility for desorbing CO 2 from a material surface by simply heating the material. In particular, porous materials functionalized with amines are under the spotlight due to their high adsorption capacity and simple synthetic procedure (wet impregnation) [8][9][10][11]. Among amines reported so far, polyethylenimine (PEI) supported on mesoporous support is advantageous over amines with low molecular weight, such as diethylenetriamine and tetraethylenepentamine, because PEI is more thermally stable and tolerant to oxidative conditions [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Branched versus Linear Structure: Lowering the CO2 Desorption Temperature of Polyethylenimine-Functionalized Silica Adsorbents

et al. 2022

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Lowering the regeneration temperature for solid CO2-capture materials is one of the critical tasks for economizing CO2-capturing processes. Based on reported pKa values and nucleophilicity, we compared two different polyethylenimines (PEIs): branched PEI (BPEI) and linear PEI (LPEI). LPEI outperformed BPEI in terms of adsorption and desorption properties. Because LPEI is a solid below 73–75 °C, even a high loading amount of LPEI can effectively adsorb CO2 without diffusive barriers. Temperature-programmed desorption (TPD) demonstrated that the desorption peak top dropped to 50.8 °C for LPEI, compared to 78.0 °C for BPEI. We also revisited the classical adsorption model of CO2 on secondary amines by using in situ modulation excitation IR spectroscopy, and proposed a new adsorption configuration, R1(R2)-NCOOH. Even though LPEI is more expensive than BPEI, considering the long-term operation of a CO2-capturing system, the low regeneration temperature makes LPEI attractive for industrial applications.

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Adsorption behavior of CO2 on amine-functionalized polyacrylonitrile fiber

Cited by 29 publications

References 22 publications

Toward Carbon Dioxide Capture from the Atmosphere: Lowering the Regeneration Temperature of Polyethylenimine-Based Adsorbents by Ionic Liquid

Toward Carbon Dioxide Capture from the Atmosphere: Lowering the Regeneration Temperature of Polyethylenimine-Based Adsorbents by Ionic Liquid

Graphene oxide-coated amino-modified polyacrylonitrile to fabricate highly conductive fabrics

Branched versus Linear Structure: Lowering the CO2 Desorption Temperature of Polyethylenimine-Functionalized Silica Adsorbents

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