The motivation of this work was to define the reburning potential of sewage sludge gasification gas(syngas). Numerical simulation of co-combustion process of syngas in hard coal-fired boiler hasbeen done. All the calculations were performed using the Chemkin program. Plug-Flow Reactormodel was used. The calculations were modelled using GRI-Mech 2.11 mechanism. The highest NOconversions are obtained at the temperature of about 1000-1200 K. The highest reduction efficiencywas achieved for the molar flow ratio of syngas equal to 15%. The combustion of hard coal withsewage sludge – derived syngas reduces NO emissions and the amount of coal needed to produceelectricity and heat. Advanced reburning, which is a more complicated process gives efficiency ofup to 80%. The calculations show that the analyzed syngas can yield better results.
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