Abstract The mercury removal performance of a low-cost recyclable CuCl2 modified magnetospheres (Cu-MF) was investigated at a 50 MWth coal-fired power plant. An increase in the Cu-MF injection rate facilitated the mercury removal and recovery process. With the combination of the existing pollutant control devices and the Cu-MF injection, an overall mercury removal efficiency of 99.3% could be achieved. Under optimal conditions, the mercury emitted from the stack was reduced to 0.10 μg/m3. Most of the mercury in the flue gas migrated to the fly ash with the spent Cu-MF. Subsequently, through magnetic separation, 67.4% of the input mercury could be recovered. The comparison of experimental results showed that Cu-MF was more effective than fly ash in removing and recovering mercury from the flue gas. With the injection of Cu-MF, HgCl2 was formed on the magnetospheres and was identified by the mercury-temperature-programmed decomposition (Hg-TPD) experiments. The magnetospheres with the lowest particle size showed the highest mercury removal capacity. This work is expected to provide valuable guidance for optimising the mercury removal technology in large scale commercial applications in future.

中文翻译：

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通过可回收的 CuCl2 改性磁层从飞灰中去除烟道气中的元素汞：第 5 部分。 50 MWth 燃煤电厂的工业规模研究

摘要 在一座 50 MWth 燃煤电厂研究了低成本可回收 CuCl2 改性磁层 (Cu-MF) 的除汞性能。Cu-MF 注入速率的增加促进了汞的去除和回收过程。结合现有污染物控制装置和Cu-MF注入，整体除汞效率可达到99.3%。在最佳条件下，烟囱排放的汞降至 0.10 μg/m3。烟道气中的大部分汞随废弃的 Cu-MF 迁移到飞灰中。随后，通过磁选，可以回收67.4%的输入汞。实验结果对比表明，Cu-MF 比飞灰更有效地去除和回收烟气中的汞。随着 Cu-MF 的注入，HgCl2 形成在磁层上，并通过汞程序升温分解 (Hg-TPD) 实验进行鉴定。具有最低粒径的磁层显示出最高的汞去除能力。这项工作有望为未来大规模商业应用中优化除汞技术提供有价值的指导。