Reactivation of calcium-based sorbent by water hydration for CO2 capture
Reactivation of calcium-based sorbent by water hydration for CO2 capture
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DOI：
10.1016/j.cej.2012.05.078
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发表时间：
2012-08
影响因子：
15.1
通讯作者：
Junjun Yin;Cheng Zhang;Changlei Qin;Wenqiang Liu;H. An;Gang Chen;B. Feng
中科院分区：
文献类型：
--
作者：
Junjun Yin;Cheng Zhang;Changlei Qin;Wenqiang Liu;H. An;Gang Chen;B. Feng
钙循环是一种新兴的CO2捕集技术，其中使用钙基吸附剂在高温下捕集CO2，然而其在几个循环之后遭受众所周知的容量损失问题。水的水合作用是一种潜在的方法，可以应用于现场重新激活吸附剂。目前的工作证实了定期水化的石灰石和合成CaO/水泥吸附剂的再活化的有效性。煅烧石灰石的水化过程与石灰石粒径、水化时间、水化温度和预煅烧温度等因素无关。超声水化也不能进一步提高水合石灰石的转化率。相反，合成CaO/水泥吸附剂表现出强烈的依赖于这些因素。此外，合成的CaO/水泥吸收剂的CaO转化率可以恢复到80%以上，通过超声水合。
Calcium looping is an emerging CO2capture technology in which CO2is captured at high temperature using a calcium-based sorbent, which however suffers from a well-known problem of loss-in-capacity after a few cycles. Water hydration is a potential method that can be applied to reactivate the sorbent on-site. The present work confirmed the effectiveness of periodic water hydration on the reactivation of a limestone and a synthetic CaO/cement sorbent. Furthermore, it was found that the water hydration of calcined limestone was independent of the factors, such as particle size, hydration duration, hydration temperature, and pre-calcination temperature. Also the conversion of hydrated limestone cannot be further enhanced by ultrasonic hydration. In contrast, the synthetic CaO/cement sorbent showed strong dependence on those factors. In addition, the CaO conversion of the synthetic CaO/cement sorbent can be recovered to more than 80% by ultrasonic hydration.