MERCURY CHEMISTRY IN SIMULATED FLUE-GASES RELATED TO WASTE INCINERATION CONDITIONS

被引：85

作者：

HALL, B ^{[1
]}

LINDQVIST, O ^{[1
]}

LJUNGSTROM, E ^{[1
]}

机构：

[1] GOTHENBURG UNIV,S-41296 GOTHENBURG,SWEDEN

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1990年 / 24卷 / 01期

关键词：

D O I：

10.1021/es00071a013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A flue gas generator has been built in order to study mercury reactions. The generator consists of a propanefueled furnace and a 12 m long temperature-controlled steel duct with a fabric filter. When vaporized (elemental) mercury was added to the propane flame in a concentration of 150 μg/m3 and with 8% excess of oxygen, 20–30% of the mercury was oxidized after 0.8 s residence time in the furnace and the duct (T > 500 °C). In the presence of HCl(g) in the flue gas, most of the elemental mercury was oxidized after 0.8 s. The reaction product is assumed to be mercuric chloride. A “rereduction” of the oxidized mercury occurs when the temperature has decreased below 200 °C. This reduction is probably a heterogeneous reaction at the surface of the flue gas duct. Experiments with mercury and activated carbon powder [0.5–1.0 g/m3, at NTP, specific surface 792 m2/g (BET)] in the flue gas duct have also been performed. The results indicate that activated carbon may act as a catalyst in the oxidation of mercury. © 1990, American Chemical Society. All rights reserved.

引用

页码：108 / 111

页数：4

共 19 条

[11]

Sidgwick N. V., 1950, CHEM ELEMENTS THEIR

[12] Studies in vapor pressure, VI: A quantitative study of the constitution of calomel vapor. [J].