Strategies to enhance CaO performance for carbon capture

https://doi.org/10.1016/j.ccst.2021.100015

“To retard the deactivation of the CaO-based sorbent over the cycles, seven primary engineering strategies were proposed and studied: (1) pre-treated by chemicals (Chi et al., 2017; Ma et al., 2019; Xu et al., 2018c), such as alcohols (Li et al., 2008; Sun et al., 2013), organic acids (Y. Xu et al., 2021b); (2) optimum the precursors, such as carbide slag (Li et al., 2015; J. Sun et al., 2019b), steel slag (Tian et al., 2018), eggshell (Nawar, 2021), D-gluconate (Guo et al., 2011) and so on; (3) stabilized by inert supports, such as MgO (J. Sun et al., 2019a; Xu et al., 2016a), Al₂O₃ (Armutlulu et al., 2017; Stendardo et al., 2013), CaZrO₃ (Wang et al., 2014) and so on; (4) pre-sintering treatment (Manovic et al., 2008), such as pre-treated at super high temperatures; (5) nano-size effect (Chen et al., 2020c, 2019; Liu and Wu, 2019); (6) reactivation of the spent sorbents (Lan and Wu, 2015); (7) alkali metals salts activation (Xu et al., 2018b; Shen et al., 2020; Xu et al., 2016b; Kurlov et al., 2020).”