Adsorption and Denitrification Characteristics of Activated Coke for Advanced Flue Gas Treatment

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  • 都市ごみ焼却排ガスの高度処理を目的とした活性コークスの吸着および脱硝特性
  • トシ ゴミ ショウキャク ハイガス ノ コウド ショリ オ モクテキ ト シタ

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Activated coke that has been developed as the material for NOx and SOx removal was applied to the advanced treatment of incineration flue gas of municipal solid waste. The material used is a denitrification catalyst and simultaneously has the capability to adsorb trace organic compounds. The treatability of some types of airborne pollutants was investigated in this study. The adsorption capacity of 1, 2-dichlorobenzene at ppm levels by activated coke was about 1 / 10 of that by activated carbon. The capacity decreased by approximately 40% with a 30°C increase in temperature above 120°C. Moreover, adsorption decreased with an increase in gas moisture. The extent of moisture influence was almost the same for 20% and 40% moisture content. Effects of temperature, moisture and space velocity (SV) on the breakthrough time of 1, 2, 3, 4-tetrachlorobenzene at ppb levels were quantitatively investigated, and the adsorption capacity was obtained. NOx reduction by activated coke increased with an increase in temperature and with an decrease in SV. It was found that a removal efficiency of 60 % or more was possible at temperatures under 200°C.

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