摘要
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_2O_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_2O_3 = 80：20 wt%sorbent provides a competitive performance of a capture capacity of 0.43 g-CO_2/g-sorbent after 20 cycles.
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_2O_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_2O_3 = 80：20 wt%sorbent provides a competitive performance of a capture capacity of 0.43 g-CO_2/g-sorbent after 20 cycles.
基金
supported by the National Basic Research Program of China(No.2011CB707301)
the National Natural Science Foundation of China(No.50936001)
