Study on the regenerable sulfur-resistant sorbent for mercury removal from nonferrous metal smelting flue gas
Study on the regenerable sulfur-resistant sorbent for mercury removal from nonferrous metal smelting flue gas
复制标题
有色金属冶炼烟气脱汞可再生抗硫吸附剂的研究
DOI：
10.1016/j.fuel.2018.12.040
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发表时间：
2019-04-01
期刊：
影响因子：
7.4
通讯作者：
Qu, Zan
中科院分区：
文献类型：
--
作者：
Quan, Zongwen;Huang, Wenjun;Qu, Zan
为了脱除和回收有色冶炼烟气中的元素汞，合成并测试了硫化钴吸附剂。吸附剂在100℃时的汞吸附容量为43.03 mg/g，突破阈值为50%。分别考察了烟气组分和反应温度对汞吸附能力的影响。结果表明，SO2、H2O、NO和O-2对吸附剂汞吸附的影响可以忽略不计。采用透射电子显微镜（TEM）、X射线衍射仪（XRD）、汞程序解吸（Hg-TPD）和X射线光电子能谱（XPS）对吸附剂进行表征。吸附剂的汞解吸活化能是根据汞程序升温解吸数据建立的模型计算的。此外，还对用过的硫化钴吸附剂进行了再生。结果表明，硫化钴吸附剂在多次循环试验中再生后仍能保持良好的吸附性能。因此，硫化钴是一种适合有色金属冶炼烟气脱汞和回收的吸附剂。
In order to remove and recycle elemental mercury from nonferrous smelting flue gas, cobalt sulfide sorbents were synthesized and tested. The mercury adsorption capacity of sorbent at 100 degrees C was 43.03 mg/g with 50% breakthrough threshold. The influences of the flue gas components and reaction temperature on the mercury adsorption capacity were investigated, respectively. The results shown that SO2, H2O, NO and O-2 had negligible impact on mercury adsorption of sorbents. Transmission electron microscopy (TEM), X-ray diffractometer (XRD), mercury programmed desorption (Hg-TPD) and X-ray photoelectron spectroscopy (XPS) were employed to characterize the sorbents. The mercury desorption activation energy from the sorbent was calculated based on a model built by the mercury temperature-programmed desorption data. Additionally, the used cobalt sulfide sorbent was regenerated. The results showed that the cobalt sulfide sorbent could maintain good adsorption performance after regeneration during several cycling tests. Therefore, cobalt sulfide is a suitable sorbent for the mercury removal and recycling from nonferrous metal smelting flue gas.