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Activated carbon impregnated with alkaline solution can be used for dry desulfurization. Because this activated carbon contains HO2 and NH3, physical adsorption and chemical action occur simultaneously during the desulfurization process, which can achieve a fast and efficient desulfurization effect.

Impregnated columnar activated carbon is mainly used for fine desulfurization in the later stage, and iron oxide can be used for coarse desulfurization before the activated carbon. And activated carbon desulfurization needs to be carried out under aerobic conditions.