Patent ID: 11000805

Abstract:
The present invention solves the existing problem of using very expensive oxidation reagents, such as H2O2 and ozone, in removal of NOx and SOx from flue gases, by performing simultaneous oxidation of NOx and SOx with atmospheric oxygen in a combined system for catalytic oxidation and wet-scrubbing of both NOx and SOx from a flue gas and manufacturing fertilisers. Two major configurations of the oxidation system are disclosed in the present invention. The first configuration operates on oxygen-enriched air to increase efficiency of the oxidation reaction and requires an additional oxygen concentrator unit. The second configuration operates on atmospheric air at ambient conditions and requires an additional catalyst activation unit. In the second configuration, the efficient oxidation process is carried out at low temperatures of about 30-90° C. in the presence of recovered and re-activated catalyst. This temperature is a result of the exothermic character of the reaction, and therefore, no heating is required in the process.