CO 2 Looping Cycle Performance of a High-Purity Limestone after Thermal Activation/Doping (original) (raw)

The influence of thermal pretreatment on the performance of a high-purity limestone (La Blanca) during CO 2 capture cycles is investigated in this paper. This limestone was chosen for more detailed investigation because, in earlier research, it failed to show any favorable effect as a result of thermal pretreatment. Here, the original sample, with a particle size of 0.4-0.6 mm, and ground samples were thermally pretreated at 1000-1200°C , for 6-24 h, and then subjected to several carbonation/calcination cycles in a thermogravimetric analyzer (TGA). This work shows that thermal pretreatment failed to produce a significant self-reactivation effect during CO 2 cycles, despite the use of a wide range of conditions during pretreatment (grinding, temperature, and pretreatment duration) as well as during cycling (CO 2 concentration and duration of the carbonation stage).

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