High-Performance Sorbents for Carbon Dioxide Capture from Air
Project No.: DE-FE0002438
NETL has partnered with the Georgia Institute of Technology to perform a combined experimental and modeling study of air capture of CO2 using low-cost, high-capacity sorbents (a material used to absorb liquid or gas) including, but not limited to, mesoporous (material containing pores with diameters between 2 and 50 nanometers) or solids functionalized with hyperbranched amino-polymers (highly branched, three-dimensional macromolecules). Understanding the response of these materials as a function of ambient humidity and temperature is crucial to optimizing cyclic operations with useful yields of CO2 and minimal energy input (Figure 1).
The goal of this project is to gather fundamental data on the potential use of amine-based and metal-organic framework (MOF) based sorbents for air capture of CO2. Project research will examine three distinct classes of amine-based sorbents:
- Those based on impregnation (physical adsorption) of amine-containing small molecules or performed oligomeric/polymeric amines into porous supports.
- Those based on covalent binding of amines to the surface of a support through use of silane (SiH4) coupling agents.
- Those based on in situ surface polymerization of reactive amine monomers, creating covalently-bound amines.
|Figure 1: Potential adsorbent materials for CO2 capture.