Analysis and perspectives concerning C[O.sub.2] chemisorption on lithium ceramics using thermal analysis

C[O.sub.2] removal from flue gas has been proposed as one of the most reliable solutions to mitigate global greenhouse emissions. Lithium ceramics are among several materials that have potential applications in C[O.sub.2] removal. Lithium ceramics are able to chemisorb C[O.sub.2] in a wide temperature range, presenting several interesting properties. All lithium ceramics present a similar C[O.sub.2] chemisorption reaction mechanism that has been described at the micrometric scale. However, there are several issues that have not been fully elucidated. The aim of this study is to re-analyze different experiments related to the C[O.sub.2] chemisorption on lithium ceramics and to propose how different factors control this process. This study focuses on diffusion controlled C[O.sub.2] chemisorption, which has been shown to be the limiting step of the C[O.sub.2] chemisorption process. Diffusion controlled C[O.sub.2] chemisorption appears to be mainly influenced by the chemical composition of a product's external shell.