| 摘要 |
PURPOSE:To denitrate efficiently a gas containing NOx such as exhaust gas by the catalytic reaction between a denitration agent which is obtained by making catalytic metal supported with mordenite and the gas containing NOx in the presence of acetic acid and/or ammonium acetate. CONSTITUTION:A denitration agent 11 which is obtained by making a catalytic metal (e.g. Co) supported with mordenite and a gas containing NOx which is introduced to a denitration tube 2 through a gas leading pipe 3 are subjected to a catalytic reaction to remove NOx. In the reaction, the denitration agent 11 is kept at a specified temperature (e.g. 300-600 deg.C) by a heater 8, and an 1-10% aqueous solution of acetic acid and/or ammonium acetate is sprayed from a nozzle 7. As a result, the deterioration, etc., of the catalytic caused by SOx, etc., in exhaust gas are reduced to increase the denitration ratio and to extend the catalyst life. Acetic acid, ammonium acetate, etc., which can be used as liquid, can be used to secure the safety and to facilitate the handling. |
