Enhanced cyclic stability of CO2 adsorption capacity of CaO-based sorbents using La2O3 or Ca12Al14O33 as additives
Enhanced cyclic stability of CO2 adsorption capacity of CaO-based sorbents using La2O3 or Ca12Al14O33 as additives
复制标题
使用La2O3或Ca12Al14O33作为添加剂增强CaO基吸附剂的CO2吸附能力的循环稳定性
DOI：
10.1007/s11814-010-0469-z
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发表时间：
2011-03
期刊：
影响因子：
--
通讯作者：
ying zheng
中科院分区：
文献类型：
--
作者：
cong luo;ying zheng
为了提高CaO在多次碳化/焙烧循环中吸附CO2的稳定性，针对CaO基吸附剂容量损失的问题，分别采用溶胶凝胶燃烧合成法(SGCS)和湿法物理混合法制备了改性CaO基吸附剂。在固定床反应器中考察了脱硫剂对CaO的循环吸附容量以及添加La_2O_3或Ca12Al_(14)O_(33)的影响。用X射线衍射仪(X射线衍射仪)和场发射扫描电子显微镜(FSEM)分别对材料的瞬时相变和微观结构进行了表征。实验结果表明，La_2O_3在碳化/焙烧反应中起到了积极作用。采用湿法物理混合法制备的CaO/Ca12Al14O33脱硫剂循环捕集CO2性能明显优于CaO/La2O3。采用SGCS法制备的CaO/La_2O_3复合吸附剂性能最好，碳化转化率可达93%，循环11次后吸附容量可达0.58g-CO_2/g-吸附剂。
To improve the stability of CaO adsorption capacity for CO2 capture during multiple carbonation/calcination cycles, modified CaO-based sorbents were synthesized by sol-gel-combustion-synthesis (SGCS) method and wet physical mixing method, respectively, to overcome the problem of loss-in-capacity of CaO-based sorbents. The cyclic CaO adsorption capacity of the sorbents as well as the effect of the addition of La2O3 or Ca12Al14O33 was investigated in a fixed-bed reactor. The transient phase change and microstructure were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FSEM), respectively. The experimental results indicate that La2O3 played an active role in the carbonation/calcination reactions. When the sorbents were made by wet physical mixing method, CaO/Ca12Al14O33 was much better than CaO/La2O3 in cyclic CO2 capture performance. When the sorbents were made by SGCS method, the synthetic CaO/La2O3 sorbent provided the best performance of a carbonation conversion of up to 93% and an adsorption capacity of up to 0.58 g-CO2/g-sorbent after 11 cycles.
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影响因子：
2.7
作者：
Y. Seo;S. Jo;H. Ryu;H. Bae;C. Ryu;Chang-Keun Yi
通讯作者：
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影响因子：
5.3
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影响因子：
2.7
作者：
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通讯作者：
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影响因子：
11.4
作者：
Liu, Wenqiang;Low, Nathanael W. L.;Diniz da Costa, Joao C.
通讯作者：
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影响因子：
2.7
作者：
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通讯作者：
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