TiO2-Doped K2CO3/Al2O3 Sorbents for CO2 Capture
TiO2-Doped K2CO3/Al2O3 Sorbents for CO2 Capture
复制标题
DOI：
10.1021/ef500133e
复制
发表时间：
2014-04
期刊：
影响因子：
5.3
通讯作者：
W. Dong;Xiaoping Chen;Ye Wu
中科院分区：
文献类型：
--
作者：
W. Dong;Xiaoping Chen;Ye Wu
K_2CO_3/Al_2O_3是一种很有潜力的CO_2捕集介质。近年来，其碳酸化和再生行为已经得到了很好的研究，据了解，K2 CO 3/Al 2 O3显示出相当高的CO2捕集能力。其主要缺点是CO2吸附率不理想。由于CO2的总吸收主要取决于前10 min的吸附，因此前10 min反应速率的增加可能非常显著和有价值。为此，对K2 CO 3的改性进行了研究。TiO 2被认为是一种潜在的掺杂剂的循环K2 CO 3/KHCO 3为基础的CO2捕获过程。扫描电子显微镜（SEM）和X射线衍射（XRD）表征结果表明，K_2CO_3/Al_2O_3中掺杂的TiO_2在反应温度范围内是稳定的。此外，TiO 2对K2 CO 3的吸附过程有积极的影响，反应速率明显提高，尤其是在前10 min。
K2CO3/Al2O3 is one potential medium that could be used for CO2 capture technology. In recent years, its carbonation and regeneration behaviors have been well-studied, and it is understood that K2CO3/Al2O3 demonstrates quite a high CO2 capture capacity. Its main drawback is the unsatisfactory CO2 adsorption rate. Because the total uptake of CO2 principally depends upon the adsorption in the first 10 min, the increase of the reaction rate in the first 10 min could be greatly significant and valuable. Therefore, the modification of K2CO3 is studied. TiO2 is considered as a potential dopant for the cyclic K2CO3/KHCO3-based CO2 capture process. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) characterizations of K2CO3/Al2O3 doped with TiO2 indicate that TiO2 is stable within the temperature range of the process. Moreover, TiO2 shows a positive effect on the adsorption process of K2CO3, and the reaction rate is observed to increase obviously, especially in the first 10 min.