Synthesis of Highly Efficient, Ca‐Based, Al2O3‐Stabilized, Carbon Gel‐Templated CO2 Sorbents

A sol-gel technique allowing the single-pot synthesis of a carbon gel-templated, Ca-based, Al2O3-stabilized CO2 sorbent is reported. Upon removal of the carbon gel template via calcination in air, hollow microspheres, comprised of a nanostructured shell are obtained. The new material possesses an excellent CO2 uptake of 0.56 g(CO2) g(sorbent)−1 after 30 cyclic calcination and carbonation reactions.