Study on the Technology of Low-temperature Flue Gas Denitrification by Carbon-based Catalyst

Denitrification performance tests and intrinsic kinetics research of activated coke were conducted in experimental environment, during which, the effects of following factors on the denitration efficiency of activated coke were analyzed, such as the oxygen concentration, water content and the ratio of nitrogen to ammonia, etc., while the mechanism of activated coke denitration technology was explored. Results show that the denitration efficiency increases with the rise of oxygen concentration; when the oxygen concentration gets up to 8%, the denitration efficiency achieves a higher value, which would basically keep unchanged as the oxygen concentration continues to increase. The presence of water has an inhibiting effect on the activity of activated coke. Higher content of ammonia does not help to improve the denitration efficiency, and may even lead to secondary pollution. The optimum ratio of ammonia to nitrogen oxides is between 1.1 and 1.2.