Zhai et al. (2023): Enhancing Aqueous Carbonation of Calcium Silicate through Acid and Base Pretreatments with Implications for Efficient Carbon Mineralization
Hang Zhai, Qiyuan Chen, Mehmet Yilmaz, Bu Wang IN: Environ. Sci. Technol. 2023, 57, 37, 13808–13817; https://doi.org/10.1021/acs.est.3c03942
Carbon dioxide (CO2) mineralization based on aqueous carbonation of alkaline earth silicate minerals is a promising route toward large-scale carbon removal. In this study, the authors designed and tested three distinctive routes to evaluate the effect of pretreatments under different pH conditions on aqueous carbonation, using amorphous calcium silicate (CS) as an example system. Pretreating CS with high concentrations (100 mM) of HCl (Route I) or NaOH (Route II and III) enhanced their carbonation degrees.