What are the advantages and disadvantages of using liquid sorbents compared to solid sorbents in direct air capture technology?
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Liquid sorbents offer advantages in direct air capture (DAC) due to their potential for high CO2 capture efficiency and ease of regeneration, as highlighted in . On the other hand, solid sorbents, such as aminopolymer-based materials, are preferred for DAC due to their high CO2 adsorption capacity and selectivity at ultra-dilute conditions, as discussed in . However, solid sorbents may face stability issues over time, especially when exposed to environmental components like CO2, O2, and H2O, as detailed in . Liquid sorbents, like superbase-derived ionic liquids (SILs), can provide high-performance and tunable sorbents in DAC by leveraging their unique CO2 interaction properties, as demonstrated in . In summary, while liquid sorbents may offer efficiency and ease of regeneration, solid sorbents are favored for their high adsorption capacity and selectivity, albeit with potential stability challenges.
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| Papers (5) | Insight |
|---|---|
| Solid sorbents, like PEI on silica, offer simplicity in synthesis, feasible CO2-desorption at 80°C, and less impact from water co-adsorption, making them advantageous over liquid sorbents in direct air capture technology. | |
| Liquid sorbents offer higher CO2 capture efficiency but face challenges in regeneration and stability. Solid sorbents are more stable but may have lower capture capacity and slower kinetics. | |
| Liquid sorbents offer high CO2 uptake but face stability issues and energy consumption. Solid sorbents, like CaO- and superbase ionic liquid-engineered ones, provide tunable, stable, and efficient CO2 capture in direct air capture technology. | |
07 Jun 2023 | Solid sorbents offer high stability and capacity for CO2 adsorption in direct air capture technology, but may suffer from accelerated deactivation when exposed to CO2 and O2, unlike liquid sorbents. |
| Solid amine-based sorbents offer advantages of low corrosivity, high adsorption capacity, and cycling stability in DAC technology. Liquid sorbents' comparison is not addressed in the paper. |
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