Uncovering the CO₂ Capture Mechanism of NaNO₃-Promoted MgO by ¹⁸O Isotope Labeling.

ABSTRACT: MgO-based CO₂ sorbents promoted with molten alkali metal nitrates (e.g., NaNO₃) have emerged as promising materials for CO₂ capture and storage technologies due to their low cost and high theoretical CO₂ uptake capacities. Yet, the mechanism by which molten alkali metal nitrates promote the carbonation of MgO (CO₂ capture reaction) remains debated and poorly understood. Here, we utilize ¹⁸O isotope labeling experiments to provide new insights into the carbonation mechanism of NaNO₃-promoted MgO sorbents, a system in which the promoter is molten under operation conditions and hence inherently challenging to characterize. To conduct the ¹⁸O isotope labeling experiments, we report a facile and large-scale

SUBMITTER: Landuyt A 

PROVIDER: S-EPMC9795564 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature