Abstract
Abstract Multi-cyclic CaO carbonation/calcination is an attractive method for CO 2 capture during coal combustion. However, the capture capacity of CaO sharply decreases with increasing carbonation/calcination cycles. In order to improve the stability of CO 2 capture capacity of CaO during carbonation/calcination cycles, synthetic CaO/Al 2 O 3 sorbents were synthesized by two methods: wet chemistry and sol–gel-combustion-synthesis (SGCS) to make a further comparison. The results indicate that the SGCS-made CaO/Al 2 O 3 = 80:20 wt% sorbent provides a competitive performance of a capture capacity of 0.43 g-CO 2 /g-sorbent after 20 cycles.
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