Affiliation:
1. BCMaterials, Basque Center for Materials
2. BCMaterials
3. Adam Mickiewicz University
4. Utrecht University
5. Ludwig-Maximilians-Universität München
6. Catalan Institute for Water Research (ICRA)
Abstract
Abstract
Anthropogenic CO2 emissions are the major driver of climate change of this century. The natural hydrological cycles cause atmospheric CO2 to be absorbed by the natural water bodies, which necessitates urgent removal of dissolved CO2 and their generated carbonate species from water. Herein, we report the first benchmark study to explore the potentials of the highly porous hybrid material class of metal-organic frameworks (MOFs) for the effective removal of dissolved CO2 and carbonic acid species from water. Seven diverse MOFs with a wide range of structural, and compositional varieties were selected on the basis of their gaseous phase CO2 capture performance. Single component adsorption studies revealed remarkably diverse CO2 removal performances, highlighting key roles of the pH (e.g., 2, 6.3, 8.3, and 10) and the nature of the carbonic species present. Amongst all materials, JUK-8 exhibited the highest adsorption capacity of 6.79 mmol/g toward carbonic acid species at pH 6.3 (CO2 and HCO3¯). Importantly, the MOFs were also found to exhibit substantial removal performance while tested with diverse natural water samples.
Publisher
Research Square Platform LLC