How Does K₂CO₃ Promote the CO₂ Uptake of MgO?

ABSTRACT: Alkaline earth metal oxides are economically attractive, earth-abundant sorbents for CO₂ capture. In particular, MgO is a promising CO₂ sorbent for applications in the intermediate temperature range (200-400 °C). However, MgO requires the addition of promoters such as alkali metal nitrates or carbonates to overcome the slow kinetics of CO₂ sorption. It has been observed experimentally that the addition of K₂CO₃ increases the CO₂ uptake of MgO, yet its role remains poorly understood; this is a critical knowledge gap for the design of more efficient sorbents. In this work, using a combination of in situ XRD and Raman spectroscopy, we gain insight into the CO₂ uptake mechanism of K₂CO₃-pr

SUBMITTER: Landuyt A 

PROVIDER: S-EPMC12728602 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature