CHEMICAL-REACTIONS OF MERCURY IN COMBUSTION FLUE-GASES
CHEMICAL-REACTIONS OF MERCURY IN COMBUSTION FLUE-GASES
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DOI：
10.1007/bf00342256
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发表时间：
1991-04-01
影响因子：
2.9
通讯作者：
LINDQVIST, O
中科院分区：
文献类型：
--
作者：
HALL, B;SCHAGER, P;LINDQVIST, O
大气中汞以不同的物理和化学形式存在，这决定了其在大气中的转化和输送能力。因此，烟道气中汞的化学性质对点源排放周围的沉积模式具有重要意义。为了在烟气中应用汞净化方法，其形态也很重要。为了在实际条件下研究这一点，使用了一个17 kW丙烷燃烧的烟气发生器，同时在连续流反应器中研究了特定Hg反应的动力学。单质汞在室温和高温（高达900摄氏度）下都容易被Cl2和HCl氧化，但不能被NH3、N2O、SO2或H2S氧化。如果有催化剂（如活性炭）存在，它会与O2发生反应。还注意到Hg和NO2之间的缓慢反应。
Atmospheric Hg is present in different physical and chemical forms, which determine its atmospheric transformation and transport capacities. The chemistry of Hg in flue gases is thus of importance for the deposition pattern around point source emissions. In order to apply Hg cleaning methods in flue gases its speciation is also of importance. To investigate this under realistic conditions, a 17 kW propane fired flue gas generator was used, while the kinetics of specific Hg reactions were investigated in a continuous flow reactor. Elemental Hg is readily oxidized by Cl2 and HCl both at room and at elevated temperatures (up to 900-degrees-C) but not by NH3, N2O, SO2 or H2S. It reacts with O2 if a catalyst, such as activated carbon, is present. A slow reaction between Hg and NO2 has also been noted.