| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Synthesis, Characterization, Modeling and Applications of Functional Porous Materials
|
| Presentation Title |
Probing the Mechanisms of Reactive Capture and Conversion of CO2 into Inorganic Carbonates Using Architected Calcium and Magnesium Silicates |
| Author(s) |
Greeshma Gadikota, Tianhe Yin, Xun Gao, Hassnain Asgar |
| On-Site Speaker (Planned) |
Hassnain Asgar |
| Abstract Scope |
The urgency in developing scalable and realizable pathways to capture and convert CO2 to inorganic carbonates motivate the advancement of energy efficient approaches. Integrated, single-step reactive capture and conversion pathways of CO2 to produce inorganic carbonates can be developed by harnessing regenerable aqueous solvents to increase the concentration of dissolved inorganic carbon to produce Ca- or Mg-carbonates. Earth abundant Ca- and Mg-silicates have been proposed as a resource for carbon mineralization. However, a calibrated understanding of CO2-aqueous solvents- Ca- and Mg-silicates is limited by the morphological heterogeneity in these naturally occurring minerals. To address this challenge, sol-gel approaches are used to architect Ca- and Mg-silicates with regular pore architectures. We delineate the chemo-morphological mechanisms underlying integrated CO2 capture and conversion to produce inorganic carbonates using regenerable solvents (e.g., sodium glycinate). Mechanistic insights into the transformations of Ca- and Mg-silicates to inorganic carbonates are gleaned from in-operando cross-scale X-ray scattering measurements. |