| Autor: |
Goncalves RB; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States., Collados CC; Institute of Separation Science and Technology, Department of Chemical and Bioengineering, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen 91058, Germany., Malliakas CD; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States., Wang Z; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States., Thommes M; Institute of Separation Science and Technology, Department of Chemical and Bioengineering, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen 91058, Germany., Snurr RQ; Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States., Hupp JT; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States. |
| Abstrakt: |
Industrialization over the past two centuries has resulted in a continuous rise in global CO 2 emissions. These emissions are changing ecosystems and livelihoods. Therefore, methods are needed to capture these emissions from point sources and possibly from our atmosphere. Though the amount of CO 2 is rising, it is challenging to capture directly from air because its concentration in air is extremely low, 0.04%. In this study, amines installed inside metal-organic frameworks (MOFs) are investigated for the adsorption of CO 2 , including at low concentrations. The amines used are polyamidoamine dendrimers that contain many primary amines. Chemically reversible adsorption of CO 2 via carbamate formation was observed, as was enhanced uptake of carbon dioxide, likely via dendrimer-amide-based physisorption. Limiting factors in this initial study are comparatively low dendrimer loadings and slow kinetics for carbon dioxide uptake and release, even at 80 °C. |
