Selective catalytic oxidation of ammonia by nitrogen oxides in a model synthesis gas

► Gas phase removal of ammonia from synthesis gas is evaluated. ► Selective oxidation of ammonia in synthesis gas is possible with addition of NOX. ► V2O5/WO3/TiO2 and H-morenite SCR catalyst perform well in reducing environments. ► On-site generation of the necessary NOX is possible by nitric acid decomposition.