Removal of Gas-Phase Elemental Mercury by Bromine-Impregnated Activated Carbon
Removal of Gas-Phase Elemental Mercury by Bromine-Impregnated Activated Carbon
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DOI：
10.4028/www.scientific.net/amr.356-360.1660
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发表时间：
2011-10
期刊：
影响因子：
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通讯作者：
Jiang Wu;Jiehe Chen;Shuaibin Zhang;P. He;J. Fang;Y. Wu
中科院分区：
文献类型：
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作者：
Jiang Wu;Jiehe Chen;Shuaibin Zhang;P. He;J. Fang;Y. Wu
在固定床系统上进行溴浸渍活性炭气相单质汞吸附实验，得到合适质量分数的溴化钾浸渍溶液。 1% wt KBr-ACs 的汞去除率为 69.0%，而 10% wt KBr-ACs 的汞去除率为 57.9%。两者都比原活性炭高42.2%。 Hg0 的去除效率与溴浓度不成正比。在80-180℃下，1%wt KBr-ACs的Hg去除效率为68.3%-71.8%，在140℃时达到最高，这是由于浸渍活性炭表面官能团的化学吸附能力增强所致。 160℃时，脱汞效率低于140℃，这是由于脱附使物理吸附减少，从而总吸附量下降。
Br-impregnated activated carbon for gas-phase elemental mercury adsorption experiments were carried out at a fixed-bed system to get the suitable mass fraction of KBr impregnation solution. Hg removal efficiency of 1% wt KBr-ACs was 69.0%, while that of 10% wt KBr-ACs was 57.9%. Both of them were higher than that of the raw activated carbon, 42.2%. The removal efficiency of Hg0 was not proportional to bromine concentration. Under 80-180°C, Hg removal efficiency of 1% wt KBr-ACs were 68.3%-71.8%, and at 140°C it reached the highest due to the increasing chemical adsorption ability of the functional groups which was on the surfaces of activated carbons by impregnating. At 160°C, Hg removal efficiency was lower than that at 140°C due to desorption making physical adsorption decrease, so that the total adsorption decreased.