Development of high capacity moisture-swing DAC sorbent for direct air capture of CO2

Wang, X.; Chen, Yan; Xu, Wenqi; Lindbråthen, Arne; Cheng, Xinyue; Chen, Xi; Zhu, Liangliang; Deng, Liyuan

doi:10.1016/j.seppur.2023.124489

Cited by 12 publications

(13 citation statements)

References 52 publications

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Section: Resultsmentioning

confidence: 83%

“… , With the quantity of water molecules rising in the hydrated system (i.e., increase in ambient moisture), the adsorbed CO 2 will be released. , This moisture-swing process between adsorption and desorption is modulated by the change of humidity instead of changing the temperature or pressure. Based on the above mechanism, the chemical reaction equation of the adsorption/desorption process of the quaternized biochar can be written as eq normalC normalO 3 2 − · n normalH 2 normalO ↔ normalH normalC normalO 3 − · m 1 normalH 2 normalO + normalO normalH − · m 2 normalH 2 normalO + ( n − m 1 − m 2 − 1 ) normalH 2 normalO normalC normalO 2 + normalO normalH − · m 2 normalH 2 normalO ↔ normalH normalC normalO 3 − · m 3 normalH 2 normalO + …”

Section: Resultsmentioning

confidence: 99%

“…After that, the curve started to level off and the adsorption capacity essentially remained unchanged. This may be caused by the adsorbent’s surface gradually becoming saturated as well as a reduction in the number of adsorption sites and the surface area available for the reaction . The four materials’ desorption kinetic curves obtained at 99% RH (see Section for details) are shown in Figure b, and they follow a similar changing trend to the adsorption curves.…”

Section: Resultsmentioning

confidence: 99%

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Quaternized Plant-Based Porous Biochar for Direct Air Capture of CO₂ by Moisture-Swing Adsorption

Cheng,

Sun,

Zheng

et al. 2024

Ind. Eng. Chem. Res.

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Direct air capture (DAC) of CO 2 is emerging as an important technology to mitigate the environmental challenges posed by excessive carbon emissions. The development of reliable and affordable adsorbents has long been a topic of great interest in the DAC field. In this work, through a quaternization process, inexpensive and readily available plant-based biochars including walnut shell, cornstalk, rice husk, and longstalked lentil shell were prepared as moisture-swing adsorbents to capture CO 2 from ambient air. Among these biochar adsorbents, the most effective one was found to be the quaternized long-stalked lentil shell, whose CO 2 adsorption capacity reached 0.88 mmol/g at 25 °C and 50% relative humidity, which is around five times that of previously reported biochar moisture-swing adsorbents (including bamboo cellulose and chitosan aerogel). Interestingly, different from the anion-exchange resin (the most studied moisture-swing adsorbent) whose adsorption capacity decreases progressively with increasing ambient humidity and the optimal adsorption requires a relative humidity below 5%, the adsorbents developed here obtained optimal adsorption performance at 50% relative humidity (at room temperature). This result greatly expands the suitable deployment area of moisture-swing DAC since the relative humidity of most land areas on earth is in the range of 40−80%.

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Section: Resultsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Quaternized Plant-Based Porous Biochar for Direct Air Capture of CO₂ by Moisture-Swing Adsorption

Cheng,

Sun,

Zheng

et al. 2024

Ind. Eng. Chem. Res.

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“…In the case of ion containing polymers, CO 2 sorption most commonly relies on the use of polymers containing cations of ammonium and imidazolium ions, − with a few examples exploring other cations such as pyridinium and phosphonium. , There is a wealth of literature examples employing each of these cation identities in varied polymer structures including PILs, − ion exchange resins, , and other cross-linked porous polymers. , Importantly, the identity of these cations directly impacts the CO 2 capture capacity of the resulting polymeric sorbents.…”

Section: Dac By Ionic Functional Groups In Polymersmentioning

confidence: 99%

Polymer Sorbent Design for the Direct Air Capture of CO₂

Robertson,

Qian,

Qiang

2024

ACS Appl. Polym. Mater.

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Anthropogenic activities have resulted in enormous increases in atmospheric CO 2 concentrations particularly since the onset of the Industrial Revolution, which have potential links with increased global temperatures, rising sea levels, increased prevalence, and severity of natural disasters, among other consequences. To enable a carbon-neutral and sustainable society, various technologies have been developed for CO 2 capture from industrial process streams as well as directly from air. Here, direct air capture (DAC) represents an essential need for reducing CO 2 concentration in the atmosphere to mitigate the negative consequences of greenhouse effects, involving systems that can reversibly adsorb and release CO 2 , in which polymers have played an integral role. This work provides insights into the development of polymer sorbents for DAC of CO 2 , specifically from the perspective of material design principles. We discuss how physical properties and chemical identities of amine-containing polymers can impact their ability to uptake CO 2 , as well as be efficiently regenerated. Additionally, polymers which use ionic interactions to react with CO 2 molecules, such as poly(ionic liquids), are also common DAC sorbent materials. Finally, a perspective is provided on the future research and technology opportunities of developing polymer-derived sorbents for DAC.

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“…Each material type has unique benefits and drawbacks, and they excel in different areas. With regard to CO 2 uptake capacity, maximum performances reach near 4 mmol/g. , Within each class of materials, there are multiple possible CO 2 uptake mechanisms driven by different functionalities.…”

Section: Introductionmentioning

confidence: 99%

Polydiallylammonium-Polysulfone Multiblock Copolymers for Moisture-Swing Direct Air Capture of Carbon Dioxide

Biery,

Shokrollahzadeh Behbahani,

Green

et al. 2024

ACS Appl. Polym. Mater.

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Polysulfones are an important class of materials for a variety of applications due to their excellent strength and thermal stability. Quaternary ammonium polymers are also useful materials due to their ion exchange properties, and such materials with alkaline counterions have been used to capture carbon dioxide (CO 2 ) from ambient air through a moisture-driven mechanism. Herein, we design sulfone-based multiblock copolymers containing ammonium functionalities and demonstrate their potential for CO 2 capture. Specifically, a series of multiblock copolymers containing both polydiallyldimethylammonium (PDADMA) and polysulfone (PSf) blocks were synthesized. PSf blocks provide mechanical integrity, while the PDADMA blocks enable the direct air capture of CO 2 . Multiblock copolymers were synthesized at high yield, and PDADMA(OH)-PSf copolymer films with good flexibility and strength were formed with IECs of 424 μmol/g (17 mol % PDADMA(OH)), 1407 μmol/g (44 mol % PDADMA(OH)), and 1726 μmol/g (50 mol % PDADMA(OH)). Thermogravimetric analysis was used to determine that all films are thermally stable up to 345 °C. Differential scanning calorimetry revealed that the 17 and 44 mol % functionalized PDADMA(OH)-PSf multiblock copolymers showed one T g at 185 °C and 50 mol % PDADMA(OH)-PSf polymer showed a T g at 183 °C and a second T g at 16 °C. Atomic force microscopy showed that the multiblock polymers exhibit disordered phase separation. The copolymer materials displayed moisture-swing direct air capture of CO 2 , opening up pathways to utilize polymer architecture and chemistry to tailor the properties of promising sorbents.

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Development of high capacity moisture-swing DAC sorbent for direct air capture of CO2

Cited by 12 publications

References 52 publications

Quaternized Plant-Based Porous Biochar for Direct Air Capture of CO₂ by Moisture-Swing Adsorption

Quaternized Plant-Based Porous Biochar for Direct Air Capture of CO₂ by Moisture-Swing Adsorption

Polymer Sorbent Design for the Direct Air Capture of CO₂

Polydiallylammonium-Polysulfone Multiblock Copolymers for Moisture-Swing Direct Air Capture of Carbon Dioxide

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Development of high capacity moisture-swing DAC sorbent for direct air capture of CO2

Cited by 12 publications

References 52 publications

Quaternized Plant-Based Porous Biochar for Direct Air Capture of CO2 by Moisture-Swing Adsorption

Quaternized Plant-Based Porous Biochar for Direct Air Capture of CO2 by Moisture-Swing Adsorption

Polymer Sorbent Design for the Direct Air Capture of CO2

Polydiallylammonium-Polysulfone Multiblock Copolymers for Moisture-Swing Direct Air Capture of Carbon Dioxide

Contact Info

Product

Resources

About

Quaternized Plant-Based Porous Biochar for Direct Air Capture of CO₂ by Moisture-Swing Adsorption

Quaternized Plant-Based Porous Biochar for Direct Air Capture of CO₂ by Moisture-Swing Adsorption

Polymer Sorbent Design for the Direct Air Capture of CO₂