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Abstract: With the aim to enhance the CO2 capture capacity and anti‐attrition property of CaO‐based sorbents simultaneously, a novel CaO‐based sphere was prepared by extrusion‐spheronization using Ca(OH)2 powder with glucose templating. The CO2 capture characteristics and attrition resistance property of the sorbent were examined and the microstructure of the sorbents was analyzed. The results demonstrate that the obtained spherical sorbents exhibit an outstanding anti‐attrition performance compared to limestone sorbent. After 100 cycles, all of the templated sorbents hold a CO2 capture capacity of more than one time higher than that of limestone. The optimum templating rate of glucose in the sorbent was 1–5 wt %. [ABSTRACT FROM AUTHOR]

The calcium-looping process for post-combustion carbon dioxide capture, an economically and technically feasible method suitable for large-scale use, has recently gained much attention. However, the capture capacity of calcium-based sorbents rapidly decreases after only a few cycles. Herein, calcium-based sorbents with enhanced cyclic CO2-capture capacity have been derived from cheap, natural raw materials by using a simple impregnation method. Limestone and shells were used as the calcium-based raw materials, with sea salt as dopant. Modified limestone had the highest CO2-capture capacity after multiple carbonation-calcination cycles. Sea-salt-doped sorbent showed a relatively stable porous surface during cycles, which resulted in a higher CO2-capture capacity. [ABSTRACT FROM AUTHOR]