Synthetic Ca‐based solid sorbents suitable for capturing CO₂ in a fluidized bed

Abstract

Abstract Coprecipitation and hydrolysis of CaO have been employed to produce Ca‐based synthetic sorbents suitable for capturing CO 2 in a fluidized bed. Their composition, CO 2 uptake, volume in small pores (2–200 nm) and resistance to attrition were measured and compared to those of limestone and dolomite. Sorbents produced by hydrolysis showed the highest uptake and resistance to attrition. After 20 cycles of carbonation and calcination, two sorbents exceeded the uptake of both limestone and dolomite, when subjected to the same regimes of reaction. A sorbent's uptake of CO 2 was shown to be determined by the volume in pores narrower than ∼200 nm.