Abstract
Calcium-based sorbents synthesized from CaO, CaCO3, and Ca(OH)2 precursors were demonstrated as high-temperature CO2 capture materials. The effect on CO2 capture capability of calcium-based sorbents receiving different activations was also investigated. After proper activation, the best carbon capturing material is CaO that captured 75% of available CO2 in nine cyclic tests and captured 61% even after 40 cyclic experiments. The correlation of the structural difference in the three activated sorbents and CO2 conversion has been discussed. The sintering effect is presumably a major cause for activity decline of calcium-based sorbents… after cyclic carbonation/decarbonation runs.
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