Low-cost non-pitch coal-based activated coke(NPAC)was taken as sample in this study.The pore structure and surface functional groups of the NPAC were analyzed by BET and XPS techniques

the desulfurization and denitrification performances of the NPAC were investigated in a fixed bed reactor at different temperatures

and the mechanisms of desulfurization and denitrification were discussed.The results demonstrated that

micropores with average pore size ranging from 0.7nm to 1.2nm and 1.5nm to1.6nm dominated on the NPAC surface.The surface of the NPAC contained the basic functional groups and the acidic functional groups

of which the contents were 0.15mmol/g and 0.05mmol/g

respectively.The main basic functional groups were nitrogen-containing species such as pyridine

and the acidic functional groups were major of carboxyls

anhydrides

carbonyls and aromatic alcohols.When the temperature was within the range of 60 ℃to 140 ℃

SO2 was absorbed on the NPAC surface by physisorption and chemisorption.With the increasing desulfurization temperature

the breakthrough time of SO2 increased firstly and then decreased

the breakthrough time of SO2 increased to 280 min at 80℃

which was the longest.The transformation of NOx on the NPAC surface at 30 ℃ to 140 ℃ was mainly conducted by adsorption process.The removal rate of NOxcould be high as 86.35% after denitrification reaction for 180 minutes at30 ℃.When the denitrification temperature was higher than 200 ℃

the catalytic conversion route played main role in the removal of NOx

which caused the NOxremoval rate went up to 99.44% at 260 ℃.In the presence of SO2 with low concentration in the flue gas

the SO2 was removed completely and the denitrification rate has no obvious decrease.