Performance of Extruded Particles from Calcium Hydroxide and Cement for CO2 Capture
Performance of Extruded Particles from Calcium Hydroxide and Cement for CO2 Capture
复制标题
DOI：
10.1021/ef201141z
复制
发表时间：
2012
期刊：
影响因子：
5.3
通讯作者：
Changlei Qin;Junjun Yin;H. An;Wenqiang Liu;B. Feng
中科院分区：
文献类型：
--
作者：
Changlei Qin;Junjun Yin;H. An;Wenqiang Liu;B. Feng
CaO与CO2的可逆反应可用于CO2捕集。然而，在实际应用之前，必须解决两个具有挑战性的问题，即cao基吸附剂的容量损失和高损耗率。本文以氢氧化钙和水泥为原料，采用螺杆挤出法制备了不同CaO含量的吸附剂，并测定了吸附剂的理化性能。采用脆性和压缩试验机测试了吸附剂颗粒的力学性能，用热重分析仪测试了吸附剂颗粒的吸附能力和再生能力。结果表明，该吸附剂具有良好的耐磨性和机械强度。与此同时，经过18次循环后，吸附剂颗粒表现出比纯CaO更高的co2捕获能力，这归因于吸附剂中Ca12Al14O33的稳定相。该吸附颗粒适合于钙环工艺。
The reversible reaction of CaO with CO2 can be used for CO2 capture. However, two challenging problems, i.e., loss-in-capacity and high attrition rate for CaO-based sorbents, must be solved before it can be practically applied. In this paper, sorbents with various CaO contents were prepared from calcium hydroxide and cement using a screw extruder and the physical and chemical properties of the sorbents were obtained. The mechanical properties of sorbent particles were tested by friability and compression testers, and the sorption capacity and regenerability were measured in a thermogravimetric analyzer. It appears that the sorbents occupied acceptable attrition resistance and good mechanical strength. In the meantime, the sorbent particles showed higher CO2-capture capacities compared to pure CaO after 18 cycles, which was attributed to the stable phase of Ca12Al14O33 in the sorbents. The sorbent particles would be suitable for the calcium looping processes.