SrO requires temperatures higher than 1000 °C to capture CO2. As shown below, for a CO2 source containing 20% CO2, higher than 1050 °C was required for two types of SrO carbonation (https://doi.org/10.1021/acs.iecr.6b00184). A typical breakthrough curve of SrO carbonation is also shown below, which required about 30 mins to complete the process of CO2 capture. In addition, the adsorbents showed poor stability after 5 cycles of adsorption/desorption. In general, this extra-high temperature adsorbent gains little attention due to these challenges. However, the introduction of CeO2 significantly improved the stability of the adsorbent and reduced the reaction temperature. This will be discussed in a separate article.
(https://doi.org/10.1021/acs.iecr.6b00184) Equilibrium of SrO/SrCO3
Breakthrough curve for CO2 capture (carbonation temperature 1100 °C; CO2 concentration 30%).(https://doi.org/10.1021/acs.iecr.6b00184)
Stability of ZrO for CO2 capture (carbonation temperature 1100 °C; CO2 concentration 30%). (https://doi.org/10.1021/acs.iecr.6b00184)