Abstract
SO2 and NOx in flue gas are major air pollutants responsible for acid rain and photochemical smog. The removal of SO2 and NOx by activated coke is a technology with some advantages, such as simultaneous removing SO2, NOx and particulate, high efficiency of purification and no secondary pollution. The used activated cokes can be regenerated by heating or water washing treatment to recover their activity, and the concentrated sulfur desorbed can be recycled as elemental sulfur, sulfuric acid or liquid SO2. This paper describes the principle and process of flue gas desulfurization and denitrification by activated coke. The paper also systematically summarizes the raw materials and production processes of activated coke, regeneration of used activated coke published in patents. Finally, future research directions are suggested. Keywords: Activated coke, Desulfurization, Denitrification, SO2, NOx, Flue gas.
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