Low temperature flue gas denitrification performance of carbon materials prepared by blending coal method

In order to study the coal blending affected to the pore structure and surface chemistry properties of carbon material for denitrification from flue gas,carbon material samples were prepared by blending coal from bituminous and anthracite. Pore structures of samples were calculated N_2 adsorption/desorption at 77 K by density functional theory.Surface chemistry of theses carbons had been characterized by X-ray photoelectron spectroscopy( XPS) and acid-base titration.Denitrification experiments from simulated flue gas of 1 000×10~(-6) NO concentration by carbon material samples were conducted on a fixed bed reactor at temperature 150 ℃.The results show that pore structure development of carbon material prepared by blending bituminous and anthracite both have two raw material coal feature,whereas its surface chemical more rich than carbon material prepared from single coal.An ideal correlation between SCR catalytic activity and acidic sites content is observed and correlation coefficient R~2 reaches 0. 969.The NO conversion seems to be promoted by presence of oxygen in flue gas.Increasing the gas-phase H_2 O concentration decreases catalytic activity of carbon material. It can be concluded that the H_2 O molecules compete with NH_3 for the same hydrophilic acid oxygen containing functional groups because molecular of H_2 O has more polarity than NH_3.