Simultaneous NOx–SOx removal by ammonia using methanol injection and partial flue gas condensation

Abstract

AbstractThe feasibility of combining selective reduction of nitric oxide by ammonia, or nitric oxide oxidation by methanol, with partial flue gas condensation has been studied in the laboratory. It was demonstrated that both combinations may result in high removal efficiencies for nitric oxide and sulfur dioxide.High‐temperature reactors (600–900°C) and low‐temperature (20–40°C) tubular condensers were applied in series, and each one was tested individually. The flow of simulated flue gas ranged from 1 to 5 Nl/min. In the condenser simultaneous absorption of ammonia, sulfur dioxide, oxygen, and nitrogen dioxide took place. At certain conditions large quantities of aerosols were formed, particularly when NO2 was present.