DeNOx 1
DeNOx 1 : (1) A Denox process for removing nitrogen oxides from the gaseous effluents from nitric acid plants. The oxides are reduced with ammonia, over a catalyst containing potassium chromate and ferric oxide. (2) A Denox process for removing nitrogen oxides from the gaseous effluents from nitric acid plants. The oxides are reduced by ammonia, over a catalyst containing iron and chromium. (3) A Denox process for removing nitrogen oxides from the gaseous effluents from chemical plants. The catalyst is vanadia on alumina