The DeCONOx process combines regenerative thermal oxidation (RTO or RNV) with a low-dust selective catalytic reduction (SCR): two proven technologies in a single system that fulfil two totally different tasks in exhaust gas purification. This combination makes it possible to reduce organic carbon compounds and carbon monoxide. The installation of catalysts also reduces the NOX concentration. The demand for energy in the afterburning is mainly or entirely covered by the fuels – CO, VOCs – contained in the flue gas, thus reducing the energy demand compared to pure low-dust SCR. The system will run autothermally with around 6500 mg/Nm³ CO in the flue gas.