(640h) CO2 Capture and Transport Behaviors of Encapsulated Liquid-like Nanoparticle Organic Hybrid Materials (NOHMs) | AIChE

(640h) CO2 Capture and Transport Behaviors of Encapsulated Liquid-like Nanoparticle Organic Hybrid Materials (NOHMs)


Rim, G. - Presenter, Columbia University
Feric, T., Columbia University
Moore, T., University of Melbourne
Park, A. H., Columbia University
The development of hybrid CO2 capture sorbents has provided a transformative solution to novel water-less and water-lean CO2 capture solvents that have been challenged with their high viscosities. A number of novel CO2 capture solvents including ionic liquids (ILs) and nanoparticle organic hybrid materials (NOHMs) have been developed to capture CO2 from various industrial sources. While NOHMs show thermodynamic advantages for stable CO2 capture such as strong CO2 binding energy resulting from functionalized amine groups, great oxidative thermal stability due to silica nanoparticles as a support, low regeneration energy, and negligible vapor pressure, the overall CO2 capture process is often limited by mass transfer as a result of high viscosity. Therefore, the application of NOHMs in large-scale CO2 capture requires an innovative design of novel solvent carriers. In order to overcome these issues, we have designed and developed a hybrid CO2 capture sorbent system based on a unique encapsulation technique, Solvent Impregnated Polymers (SIPs). By immobilizing NOHMs solvents as microemulsions inside a gas permeable polymer (PDMS) matrix, the CO2 capture rate was significantly improved compared to the bulk NOHMs solvent due to the increase in the gas-liquid interfacial areas and the gas permeability. The governing mechanism of CO2 capture using encapsulated NOHMs was investigated based on kinetic modeling. The experimental findings suggest that the encapsulation of NOHMs can allow for a flexible design of CO2 capture units ranging from a fixed bed to a fluidized bed as the sorbents can be treated as a particulate system. The effect of moisture on the CO2 capture behavior was also investigated as well as the recyclability of the encapsulated NOHMs.

Prepared by LLNL under Contract DE-AC52-07NA27344