活性炭负载催化剂去除燃煤烟气中单质汞的研究

以贵州凯里褐煤进行燃烧实验,研究采用CoCl2(负载量20%)改性的活性炭去除烟气中的单质汞。颗粒态汞占烟气总汞的87%,而单质汞占气态汞的80.4%。改性活性炭吸附了气态汞中97%的单质汞,而吸收液只吸收了3%的单质汞。可见改性活性炭也能有效地吸附煤燃烧实验中的烟气汞。实验结果表明,煤中汞的释放率为59.5%,1kg的改性活性炭可以吸附208t煤所产生的烟气中的气态单质汞。

Removal of Element Mercury in Coal-burning Gas by Activated Carbon Loaded by Catalysts

The combustion test was carried out with wood coal from KaiLi GuiZhou. In this study, we chose activated carbon modified by CoGl2 （20% loading） to remove the elemental mercury in flue gas. Particulate mercury accounted for 87% of total mercury, while elemental mercury accounted for 80.4% of gaseous mercury. Modified activated carbon adsorbed 97% of elemental mercury in gaseous mercury; however, the absorption liquid only absorbed 3% of elemental mercury. Consequently, modified acti- vated carbon was able to absorb gaseous mercury in coal combustion test efficiently. The results showed that the release ratio of Hg in coal was 59.5% , and 1 kg of modified activated carbon could absorb the gaseous elemental mercury in flue gas yielded by 208 t of coal.