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| Review of Mercury Control Technologies for Power Plant Flue Gas in United States |
| LIU Wei-dong1,WANG Ying1, YAO Ya-xuan2 |
| 1.Hebei Institute of Metrological Supervision and Testing Laboratory, Shijiazhuang 050051,China; 2.National Institute of Metrology, Beijing 100029,China |
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Abstract Mercury pollution can seriously influence health of human beings. Mercury emission from power plant flue gas consists of around 1/3 of anthropogenic activities. Research progresses in this field in United States were discussed, including mercury state in flue gas, role of current air pollution control devices, state-of-art of mercury control technologies and their advantages and disadvantages. Part of mercury in coal could be washed out to waste effluents by coal cleaning. Mercury could be effectively removed from flue gas by sorbent injection, However, fly ash generated by coal burning is contaminated by adsorbent and mercury， and adsorbent used in sorbent injection is quite expensive. In stead of inject adsorbents into flue gas, coat the fabric filter with carbonaceous and/or sulfur containing materials can solve the problems of sorbent injection technology. This novel technology is still under pilot study and will be commercialized in the future.
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