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Removal of 25ppm NO was examined in humid air over pitch and polyacrylonitrile (PAN) based activated carbon fibers (ACF) at a temperature range of 30-150℃ using NH_3 as a reductant, to develop a deNOx... process for the start-up of a natural gas boiler where the selective catalytic reduction of NO usually does not work because of the low temperature of flue gas. Marked adsorption and reduction of NO were found to take place at 30-150℃ by W/F:5.0×10^<-3>g・min/ml over PAN-ACF FE300 heated at 800℃. Heat-treatment at this high temperature was very effective to increase the activity of PAN-ACF, which was found to be much more than the activity of pitch based ACF of larger surface area in the whole range of the reaction temperature. Thus, PAN-ACF-H800 allowed to the complete NO removal, while the temperature was raised from 30 to 150℃ for 2hr, which is equivalent to typical start-up conditions. Repeated use of the PAN-ACF-H800 was attempted after regeneration of the activity at 30℃.show more
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Export Mendeley
KJ00004507973