Review of polyethylenimine through ring-opening polymerization reactions and its application in CO2 capture

Al-Absi, Akram A.; Ogungbenro, Adetola E.; Benneker, Anne M.; Mahinpey, Nader

doi:10.1016/j.jece.2024.112739

Cited by 5 publications

(3 citation statements)

References 165 publications

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“…Longer operation times are expected to result in further decline, given that the amines are physically bonded to the supports, and multiple heating− cooling cycles induce amine degradation, continuing until all amines are completely removed. 80 In contrast, chemically bonded amines demonstrated better performance as anticipated, with the CO 2 uptake drop for the in situ-polymerized sorbent being only 0.3% across 50 cycles of operation. This remarkable stability of the material suggests its suitability for sustainable DAC design.…”

Section: Long-term Cyclic Stabilitymentioning

confidence: 59%

“…As depicted in Figure , although the impregnated amines exhibited the highest CO 2 uptakes, they suffered the most substantial drop in CO 2 uptakes after 50 cycles. Longer operation times are expected to result in further decline, given that the amines are physically bonded to the supports, and multiple heating–cooling cycles induce amine degradation, continuing until all amines are completely removed . In contrast, chemically bonded amines demonstrated better performance as anticipated, with the CO 2 uptake drop for the in situ-polymerized sorbent being only 0.3% across 50 cycles of operation.…”

Section: Resultsmentioning

confidence: 87%

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Amine Sorbents for Sustainable Direct Air Capture: Long-Term Stability and Extended Aging Study

Al-Absi,

Benneker,

Mahinpey

2024

Energy Fuels

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The emerging technology of direct air capture (DAC) holds promise for the extraction of CO 2 from the air, offering a potential avenue to reverse climate change. However, DAC is still in its early stages of development, particularly on the sorbent material side, and the long-term stability of sorbents remains inadequately understood. This study investigates the impact of thermal degradation, hydrothermal treatment, long-term cyclic operation, and extended aging over 3 years on amine-supported sorbents and its effect on the adsorption capacity at DAC conditions. Sorbents were synthesized through various methods (impregnation, chemical grafting, and in situ polymerization) into two supports: large-pore AlMCM-41 (LPAlSi) and mesoporous silica foam (MSF). LPAlSi support demonstrates superior stability compared to MSF support under thermal and hydrothermal treatments. Impregnated sorbents with physically bonded amines exhibit the lowest stability, with a significant amine loss during all treatments, confirmed through porosity analysis, thermogravimetric analysis (TGA) decomposition, scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR). Additionally, they experience a notable 6% decrease in CO 2 uptake after 50 cycles. In contrast, chemically bonded amines through grafting and in situ polymerization display better stability due to stronger bonding, maintaining CO 2 uptake despite harsh treatments. In situ-polymerized sorbents into LPAlSi exhibit remarkable stability under thermal and hydrothermal treatments, experiencing drops of 17 and 27% over 3 days, respectively. Furthermore, they demonstrate outstanding stability over 50 cycles under DAC conditions, with only a 0.3% drop in CO 2 uptake. Extended aging of class III sorbent for 3 years indicates good stability in CO 2 uptake, with only an 11% drop compared to impregnated ones, which showed a larger decrease over a shorter time. The presented results suggest that in situ-polymerized amines into LPAlSi are promising materials for DAC, offering good capacity and significant long-term stability. With opportunities for further sorbent optimization, there is substantial potential to deploy DAC at a scalable level and mitigate global warming effects.

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Section: Long-term Cyclic Stabilitymentioning

confidence: 59%

Section: Resultsmentioning

confidence: 87%

Amine Sorbents for Sustainable Direct Air Capture: Long-Term Stability and Extended Aging Study

Al-Absi,

Benneker,

Mahinpey

2024

Energy Fuels

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“…The rise in atmospheric carbon dioxide levels is a significant concern, as it is one of the primary drivers of climate change. − This increment is mainly due to human actions, including deforestation, the combustion of fossil fuels, and other industrial and agricultural practices. − As the concentration of CO 2 increases, it traps more heat in the atmosphere, leading to rising global temperatures and a range of associated effects such as more intense and frequent extreme weather events, rising sea levels, and alterations in patterns of precipitation. , …”

Section: Introductionmentioning

confidence: 99%

Chemical Looping Combustion over Yolk–Shell-Type Alumina-Based Oxygen Carrier: Catalytic Structure and Process Activity

Daneshmand-jahromi,

Sedghkerdar,

Karami

et al. 2024

Energy Fuels

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Chemical looping combustion (CLC) is an innovative cyclic process for fuel combustion to intrinsically separate carbon dioxide. In this process, oxygen and fuel are contacted by an intermediate oxygen carrier (OC), a metal oxide/metal that can alternately be reduced and oxidized. In this study, a yolk (Al2O3)–shell (ZrO2) was synthesized as the support of the OC and 20 wt % copper oxide was impregnated on the surface of it. The structure and cyclic reduction–oxidation (redox) performance of the CuO-impregnated yolk–shell sample were compared with those of CuO-impregnated core (Al2O3)–shell (ZrO2) and CuO-impregnated alumina oxygen carriers in the CLC process. The synthesized OCs were characterized by Brunauer–Emmett–Teller (BET) surface area, X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX) dot mapping. A homogeneous coating of the zirconia on the alumina was obtained for the yolk–shell material. The pore size distribution became narrow in the presence of the zirconia coating. Furthermore, a yolk–shell architecture prevented the contact between the yolk (Al2O3) and the copper oxide materials, and CuAl2O4 spinel formation was inhibited. The obtained results showed that the oxygen transport capacities of the 20CuO/Al–C@Zr (yolk–shell support), 20CuO/Al@Zr (core–shell support), and 20CuO/Al oxygen carriers are 3.80, 3.47, and 3.4 wt %, respectively. The oxygen carrier with the yolk–shell support exhibited the highest activity, oxygen transport capacity, and coke formation resistance.

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Preparation and functionalization of metal-organic frameworks, MOF-808s, and their application in adsorption

Lee,

Ahmed,

Hossain

et al. 2025

Coordination Chemistry Reviews

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Review of polyethylenimine through ring-opening polymerization reactions and its application in CO2 capture

Cited by 5 publications

References 165 publications

Amine Sorbents for Sustainable Direct Air Capture: Long-Term Stability and Extended Aging Study

Amine Sorbents for Sustainable Direct Air Capture: Long-Term Stability and Extended Aging Study

Chemical Looping Combustion over Yolk–Shell-Type Alumina-Based Oxygen Carrier: Catalytic Structure and Process Activity

Preparation and functionalization of metal-organic frameworks, MOF-808s, and their application in adsorption

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