Abstract: Activated carbons were prepared from various coals and employed to remove NOx and SOx from a simulated flue gas. Results show that the best activated carbon tested, in terms of de-NOx and de-SOx performance, is produced from sub-bituminous coal. The addition of coking coal can decrease the abrasive wear of the activated carbon in a fluidized bed, and the optimum amount of coking coal is determined to be 25w/%. A post-oxidation process can be used to greatly improve the de-SOx and de-NOx performance of the resultant activated carbons.