The management of CO2 emissions is one of the most significant technical challenges associated with fossil fuel usage.  For capture at power plants, new sorbents, such as metal organic frameworks (MOFs), offer unique opportunities to optimize pore structure and selectivity for pre-combustion capture.  A series of structurally dynamic metal organic framework (MOF) sorbents have been evaluated for CO2 capture from mixed gas streams.  In situ infrared spectroscopy and small angle neutron scattering were used to probe structural changes occurring in these MOFs during the adsorption of CO2 mixtures at pressures up to ~40 atm.  Gas chromatography was used to evaluate the change in headspace composition above the sorbent bed at equilibrium and quantify the selective adsorption of CO2 from these mixtures.  Collectively these in situ techniques can provide physical insight into how conformational rearrangements of ligands, adsorption sites, and guest-induced structural changes impact selectivity.

Structurally dynamic metal organic frameworks for CO<sub>2</sub> capture

243rd National Meeting (2012)

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Structurally dynamic metal organic frameworks for CO2 capture

Structurally dynamic metal organic frameworks for CO₂ capture