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Selective Adsorption of CO2 from Light Gas Mixtures by Using a Structurally Dynamic Porous Coordination Polymer


  • This work was performed in support of the National Energy Technology Laboratory’s ongoing research in CO2 capture under the RES contract DE-FE0004000 and has utilized neutron scattering facilities supported in part by the National Science Foundation under Agreement No. DMR-0454672. Reference in this work to any specific commercial product is to facilitate understanding and does not necessarily imply endorsement by the United States Department of Energy. Certain commercial materials and equipment are identified in this paper only to specify adequately the experimental procedure. In no case does such identification imply recommendation by NIST nor does it imply that the material or equipment identified is necessarily the best available for this purpose. The authors thank Juscelino Leao, Wendy Queen, and Craig Brown of the NIST Center for Neutron Research and Martin Green of NIST Ceramics Division for their valuable technical discussions and contributions.


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Flexibility provides selectivity: The selective adsorption of CO2 from mixtures with N2, CH4, and N2O in a dynamic porous coordination polymer (see monomer structure) was evaluated by ATR-FTIR spectroscopy, GC, and SANS. All three techniques indicate highly selective adsorption of CO2 from CO2/CH4 and CO2/N2 mixtures at 30 °C, with no selectivity observed for the CO2/N2O system.