267897 Characterization of an Ion Exchange Resin for CO2 Capture

Wednesday, October 31, 2012: 12:46 PM
404 (Convention Center )
Alexander Hallenbeck, Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA and John R. Kitchin, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA

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.

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