Patent ID: 7871823

Claim:
A method for managing a denitration catalyst, the method for managing a plurality of denitration catalysts in an exhaust-gas denitration system, the method comprising: predicting performance of each of the denitration catalysts based on information on a scale and a total time of operation of the exhaust-gas denitration system; and determining, in consideration of both [NH 3 ] and [NO x ] measured at an inlet and an outlet of each denitration catalyst, execution timing for regeneration of the denitration catalysts, for replacement of the denitration catalysts, and for addition of a new denitration catalyst, besides already provided denitration catalysts, based on the performance, wherein the performance is determined by calculating a denitration ratio (η) according to the following equation (2): η = ( inlet ⁢ ⁢ ⁢ NH 3 - outlet ⁢ ⁢ NH 3 ) ( inlet ⁢ ⁢ ⁢ NH 3 - outlet ⁢ ⁢ NH 3 + outlet ⁢ ⁢ NO x ) × 100 × evaluation ⁢ ⁢ mole ⁢ ⁢ ratio inlet ⁢ ⁢ mole ⁢ ⁢ ratio . ( 2 )