吸附法治理汞废气的机理研究

该文对载银活性炭吸附汞蒸气的机理进行了探讨 ,通过电子探针和扫描电镜对载银活性炭及被汞“饱和”的载银活性炭进行微观结构分析 ,结果显示 ,银在活性炭中主要分布于活性炭的凸面处 ,汞只在有银存在的地方出现 ,表明普通活性炭不具备吸附汞的能力 ,载银活性炭吸附汞属于以银为核心的多分子物理吸附 ,工业上的“饱和”载银活性炭仍具有一定的吸附汞蒸气的能力 ,为交替式吸附床的结构设计提供了技术依据 .

Treatment of Waste Gas Containing Mercury with Adsorption Method

The paper discusses mechanism of adsorption of mercury vapor by silver carrying active carbon. Microstructures of silver carrying active carbon and silver carrying active carbon "saturated" with mercury were observed using an electron probe and SEM. The results show that most of the silver in active carbon is distributed at the convexes of active carbon, while mercury occurs only at sites where silver exists. This indicates that ordinary active carbon does not adsorb mercury. Mercury adsorption in silver carrying active carbon is physical adsorption around silver nuclei. The so called saturated silver carrying active carbon in industry is still capable of adsorbing mercury vapor. This provides technical foundations for a structure design of adsorbing beds of alternate form.