SGCS-made ultrafine CaO/Al_2O_3 sorbent for cyclic CO_2 capture  

作　　者：Cong Luo Ying Zheng Ning Ding Qi Long Wu Chu Guang Zheng 

机构地区：[1]State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Chinese Chemical Letters》2011年第5期615-618,共4页中国化学快报（英文版）

基　　金：supported by the National Basic Research Program of China(No.2011CB707301);the National Natural Science Foundation of China(No.50936001)

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.

关 键 词：CO_2 capture CAO Carbonation/calcination cycles SGCS 

分 类 号：TQ116.3[化学工程—无机化工] V249[航空宇航科学与技术—飞行器设计]