METHOD FOR PREDICTING REGENERATION OF DeNOx CATALYST AND EXHAUST SYSTEM USING THE SAME

摘要

PURPOSE: A method for measuring the amount of nitrogen oxide which is left after regenerating catalysts for reducing the nitrogen oxide and an exhaust device using the same are provided to exactly estimate the input amount of reducing agents and a regeneration time of the catalysts. CONSTITUTION: A method for measuring the amount of nitrogen oxide which is left after regenerating catalysts for reducing the nitrogen oxide comprises following steps. The mass flow of total reducing agents is calculated(S290). The mass flow of reducing agents for a nitrate-reduction reaction, the mass flow of the reducing agents for a nitrogen dioxide-reduction reaction, and the mass flow of the reducing agents for oxidation are calculated using the mass flow of total reducing agents(S330). The mass flow of desorbed carbon dioxide, and the mass flow of reduction nitrogen dioxide are calculated(S360). The mass flow of nitrogen dioxide slipped in the catalysts for reducing the nitrogen oxide is calculated(S380). After the regeneration, the amount of the nitrogen dioxide and nitrogen oxide left in the catalysts for reducing the nitrogen oxide are calculated.