Exhaust gas treating systems

Details Exhaust gas treating systems Exhaust gas treating systems

B - Operations, Transporting

01

J

B01J 20/20 (2006.01) B01D 53/50 (2006.01) B01D 53/56 (2006.01) B01D 53/60 (2006.01) B01D 53/86 (2006.01) B01J 21/18 (2006.01) B01J 35/00 (2006.01)

Patent

CA 2193638

An active carbon for use in the treatment of exhaust gas can be obtained by heat-treating a starting active carbon fiber derived from polyacrylonitrile, pitch or the like or a starting particulate active carbon in a non-oxidizing atmosphere. The heat-treating temperature is preferably in the range of 600 to 1,200°C for use in the desulfurization of exhaust gas, and in range of 600 to 1,000°C for use in the denitration of exhaust gas. By using the resulting heat-treated active carbon for the purpose of desulfurization, the sulfur oxide concentration in exhaust gas can be reduced to 5 ppm or below. Moreover, by using the heat-treated active carbon in combination with conventional denitration based on selective catalytic reduction, the nitrogen oxide concentration in exhaust gas can be reduced to 1 ppm or below.

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