Study on the Adsorption Performance of Modified Activated Carbon for Nitrogen Oxides in Lead-Zinc Smelting Flue Gas at Low Temperature
Considering traditional technologies-based low flue gas denitrification rate and small adsorption rate of activated carbon under low temperature conditions,a modified activated carbon suitable for low temperature conditions was studied by improving the temperature conditions.Through analyzing the proper-ties of nitrogen oxides in the flue gas discharged from lead zinc smelting,making use of ammonia gas cat-alyze the separation of NOx in the flue gas and modify the structure through pore expansion and activator to increase the specific surface area and adsorption capacity of activated carbon,oxidize the oxygen-containing functional groups on the surface of modified activated carbon,stimulate its adsorption capacity to adapt to low-temperature conditions were implemented,including making use of the Langmuir model and the Fre-undilch theory analyze the equilibrium relationship between the activated carbon adsorption capacity and the temperature and calculate the degree of freedom to improve the accuracy of NOx adsorption data moni-toring and calculation.The experimental results show that,the NOx denitration rate of activated carbon im-proved by adding potassium carbonate and iron hydroxyl can reach 70%to 100%,and the adsorption rate can be up to 0.7 mg/min.
modified activated carbonnitrogen oxidesflue gas denitrification raterate of adsorptionlow-temperature environment
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