2024 AIChE Annual Meeting
(494e) Structured Polymeric Adsorbents for Low Concentrated CO2 Capture Applications
Authors
Sekizkardes, A. - Presenter, National Energy Technology Laboratory
Muldoon, P., University of Pittsburgh
Tiwari, S., Battelle/NETL
Kusuma, V. A., Leidos Research Support Team
Steckel, J., National Energy Technology Laboratory
Direct air capture (DAC) technologies have garnered unprecedented interest globally as governments and industries seek to combat the raising CO2 emissions. Compared to other gas capture applications, DAC is still in the early stage and the cost of the technology is very high which necessitates extensive basic science research study. The high cost is primarily attributable to formidable challenges including short sorbent lifespan, slow adsorption kinetics and high-energy demanding regeneration. Therefore, there is a need for high CO2 capacity sorbents that are chemically stable, inexpensive, regenerated at low temperatures, and capable of fast sorption and desorption cycles. We have developed a new porous polymeric sorbents based on polymers of intrinsic microporosity (PIMs).1 Several sorbent formulations tethered with amine functionalities showed promising CO2 uptake properties (1.5 mmol/g) under realistic direct air capture settings. Moreover, the sorbents were structured in various form factors including hollow fibers, flat sheet fibers and electro spun fibers without the need for any binder or processing materials. All sorbents are regenerable at 60 oC given the synergetic combination of the low amine content and controlled porosity in the sorbents. In this presentation, the synthesis of various new sorbent formulations, the study of several sorbent form factors and the CO2 capture properties of these novel polymeric sorbents will be presented.
Reference
- Sekizkardes, A. K.; Kusuma, V.A.; Muldoon P.; Hoffman, J. S.; Steckel J.; Hopkinson D. “Single polymer sorbent fibers for high performance and rapid direct air capture.” Mater. Chemistry A 2023, 11, 1670- 11674