Unveiling the reaction dynamics of Li3BO3 high-capacity CO2 sorbent

Solid sorbets for CO2 capture applications are a technological pathway to prevent CO2 emissions from being released to the atmosphere and are therefore a key strategy to mitigate global warming. In this work, we aim to explore the reaction dynamics of high-temperature CO2 capture of the recently proposed high-capacity CO2 sorbent Li3BO3, which displays remarkably fast kinetics together with high CO2 capacity and excellent regenerability, which are also significantly enhanced by the addition of alkali fluorides. By performing in situ X-ray diffraction studies under different CO2 partial pressures and temperatures we aim to unveil the reaction mechanisms of L3BiO3 and Na- and K- modified Li3BO3 solid sorbents under relevant operational conditions and provide solid grounds for the design of performance-optimized Li3BiO3-based sorbents.