SO2-Resistant Immobilized Amine Sorbents for CO2 Capture
Project No.: DE-FE0001780

DOE is partnering with the University of Akron (Akron) to conduct research and training to develop an effective solid amine sorbent for large scale post-combustion CO2 capture from power plant flue gas. Sorbent materials developed by Akron consist of immobilized carbon and hydrogen structures (paraffin) distributed inside of the amine pores and aromatic amines located on the external surface and the pore mouth of the sorbent. The immobilized paraffinic amines have been shown to display excellent CO2 capture capacity by adsorbing CO2 at temperatures below 55 °C and releasing it at temperatures between 80-120 °C. This effort will focus on increasing scientific understanding of the chemical and physical principles affecting amines deposited on a series of porous solids that generally have large pore space, high surface area, and/or high thermal conductivity.

The primary objective of the project is to develop an efficient and low-cost CO2 capture solid sorbent which is highly resistant to SO2 and thermal degradation. The project is targeting to achieve an adsorption capacity of greater than 1.5 mmol CO2/gram of sorbent and less than 10% sorbent degradation per 100 cycles. Results from characterization and sorbent performance will provide the database needed for fine-tuning the basicity, dispersion, and distribution of immobilized amines on a series of porous solids. The proposed concept for this project can be further extended to the preparation of highly poison-resistant basic catalysts for organic synthesis.

Schematic of proposed amine absorbent concept by the University of Akron.

Figure 1: Schematic of proposed amine absorbent concept by the University of Akron. The proposed sorbent particles consist of immobilized paraffinic amines distributed inside amine pore spaces, and aromatic amines on the external pore surface. (click to enlarge)

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  • For further information on this project, contact the NETL Project Manager, Elaine Everitt.