NO reduction by coal char was investigated in a fixed bed reactor using a simulated flue gas.Two different operation modes(programmed temperature and constant temperature) were employed to explore the mechanism of NO removal by coal char and to study the effects of the variables on NO removal efficiency and selectivity including temperature,coal type,NO and oxygen concentrations in flue gas and space velocity.The results indicated that surface complexes formed by chemisorption of NO and O2 on carbon active ...