Study on the failure mechanism of potassium-based sorbent for CO2 capture and the improving measure
Study on the failure mechanism of potassium-based sorbent for CO2 capture and the improving measure
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钾基吸附剂CO2捕集失效机理及改进措施研究
DOI：
10.1016/j.ijggc.2011.05.034
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发表时间：
2011-09
影响因子：
3.9
通讯作者：
Zhao, Chuanwen
中科院分区：
文献类型：
--
作者：
Wu, Ye;Chen, Xiaoping;Zhao, Chuanwen
采用热重分析仪（TGA）、X射线衍射仪（XRD）和硫酸钡重量法，研究了K2 CO 3和K2 CO 3/Al 2 O3在模拟烟气中与SO2的碳酸化反应，并推导了反应方程。结果表明，反应过程中有KHCO 3和K2 SO 3生成。K2 SO 3的生成降低了吸附剂的利用率。K2 CO 3、SO2和H2O反应生成K4 H2（CO 3）3·1.5H2O，H2O可加速AR K2 CO 3的硫酸化反应。K2 CO 3/Al 2 O3与SO2、H2O反应生成K2 CO 3·1.5H2O和K2 SO 3，K2 SO 3直接由K2 CO 3/Al 2 O3硫酸化反应生成。K_2CO_3·1.5H_2O不与SO_2反应，K_2CO_3·1.5H_2O/Al_2O_3与SO_2反应缓慢。与未经H2O预处理的反应过程相比，经H2O预处理后，KAl 30的反应速率有所提高，反应失败率约为未经H2O预处理的一半。因此，K2 CO 3/Al 2 O3经H2O预处理后具有良好的抗碳化和抗硫酸盐化性能。
With thermogravimetric apparatus (TGA), X-ray diffraction (XRD) and barium sulfate gravimetric methods, the carbonation reactivities of K2CO3and K2CO3/Al2O3in the simulated flue gases with SO2are investigated and the reaction equations are inferred. Results show that there are KHCO3and K2SO3generated. The generation K2SO3reduces the utilization ratio of the sorbent. H2O may accelerates the sulfation reaction of AR K2CO3as K4H2(CO3)3·1.5H2O is generated in the reaction among K2CO3, SO2and H2O. K2SO3is directly generated from sulfation reaction of K2CO3/Al2O3, because there are K2CO3·1.5H2O and K2SO3generated in the reaction among K2CO3/Al2O3, SO2and H2O. K2CO3·1.5H2O does not react with SO2, and K2CO3·1.5H2O/Al2O3reacts with SO2slowly. Compare with the reaction process without H2O pretreatment, the reaction rates of KAl30 increased after H2O pretreatment and the failure ratio is about a half of that without H2O pretreatment. So, K2CO3/Al2O3shows good carbonation and anti-sulfation characteristic after H2O pretreatment.
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影响因子：
5.3
作者：
Lee, SC;Choi, BY;Kim, JC
通讯作者：
Kim, JC
影响因子：
2.7
作者：
Yongwon Seo;Y. Moon;Sung-Ho Jo;Chong-Kul Ryu;C. Yi
通讯作者：
Yongwon Seo;Y. Moon;Sung-Ho Jo;Chong-Kul Ryu;C. Yi
影响因子：
5.3
作者：
Chuanwen Zhao;Xiaoping Chen;Changsui Zhao
通讯作者：
Chuanwen Zhao;Xiaoping Chen;Changsui Zhao
影响因子：
5.3
作者：
Chuanwen Zhao;Xiaoping Chen;Changsui Zhao;Yakun Liu
通讯作者：
Chuanwen Zhao;Xiaoping Chen;Changsui Zhao;Yakun Liu
影响因子：
2.7
作者：
Lee, Soo Chool;Choi, Bo Yun;Kim, Jae Chang
通讯作者：
Kim, Jae Chang