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.
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