(460b) Characterization of an Ion Exchange Resin for CO2 Capture

We have investigated the CO2 capture performance of a commercially
available ion exchange resin based on a polystyrene functionalized primary
amine for post-combustion CO2 capture applications. The resin shows
moderate capture capacities in the range of 1-2.5 mol/kg depending on the
capture/regeneration conditions. Significantly, the resin showed low
moisture capacity, and stability over multiple cycles in the presence of
oxygen. The resin is fully regenerated in inert gas at temperatures in the
range of 100-120 degC. Vibrational spectroscopy indicates that the primary
capture mechanism is through carbamate formation, although there is
evidence of a significant, secondary capture mechanism as well. The resin
can capture CO2 under conditions ranging from atmospheric CO2
concentrations to 1 bar, and can be fully regenerated in 1 bar CO2 at 200
degC. We will present our work in characterizing the CO2 capture
performance of the resin, and our assessment of its suitability for large
scale utilization and other CO2 capture applications.