Enhanced CO 2 capture capacity of limestone by discontinuous addition of hydrogen chloride in carbonation at calcium looping conditions

Synthesis of highly effective stabilized CaO sorbents via a sacrificial N-doped carbon nanosheet template

“…4 Alternative approaches involve developing intermediate-temperature and high-temperature sorbents, which can directly trap CO from hot flue gases, and thus reduce the cost of CO 2 capture to more commercially acceptable levels. 5 Numerous types of sorbents including hydrotalcites 6,7 , calcium oxides [8][9][10][11] , and ceramic materials [12][13][14][15] have been studied. Calcium oxides in the form of calcium looping (CL) technology are considered to be one of the most promising candidates among these materials owing to (i) abundant naturally occurring CaO precursors (e.g.…”

Acidification Optimization and Granulation of a Steel‐Slag‐Derived Sorbent for CO2 Capture

“…This illustrates that CAS has more stable CO 2 capture capability and better anti‐sintering ability. The sintering‐resistant nature of CAS is partly due to the presence of MgO particles with a high Tammann temperature of 1276 °C, which act as an inert barrier to prevent sintering and aggregation of the CaCO 3 nanoparticles , , . In part, the low content of SiO 2 (0.26 wt %) in CAS also contributes to the CO 2 sorption stability, because excessive SiO 2 would accelerate sorbent sintering due to the formation of regions of low‐melting eutectic .…”

Pelletization and attrition of CaO‐based adsorbent for CO2 capture

“…However, the main reason that limited the wide industrial application of CaO‐based adsorbents was that the adsorbent would experience severe sintering with the increasing amount of carbonation/calcination cycles, which could result in a dramatically drop on the adsorption capacity 12 . Several methods, such as the use of different calcium‐based precursors, 13–16 hydration treatment, 17–21 acid modification, 22–25 etc., has been taken to improve the adsorption performance and multi‐cycle stability of CaO‐based materials. In addition, introducing an inert component with a high melting point into the calcium‐based adsorbent could effectively improve the sintering problem.…”