MANUFACTURING METHOD OF CATALYST HAVING NOx OCCLUDING MATERIAL

文件类型：PDF文档
文件大小：67K
PROBLEM TO BE SOLVED : To manufacture an NOx removing catalyst having good regeneration performance from SOx poisoning.SOLUTION : The method is used in manufacturing a catalyst having an NOx occluding material in which at least one compound selected from alkali, alkaline earth and rare earth metals is carried on a carrier as an NOx occluding material and comprises the steps of converting, with an organic acid, the compound of the metal element to serve as the NOx occluding material into a complex ion of a potential opposite to that of the carrier, causing the carrier to carry the complex ion and drying and baking the resultant carrier. The organic acid may be succinic, malic, tartaric or citric acid. The method keeps the NOx occluding material to be kept in a highly dispersed state in the form of particulate throughout the process from the synthesis of the NOx occluding material to the carrying on the carrier, resulting in improvement in regeneration performance from SOx poisoning of the resultant catalyst and thus providing a catalyst of an excellent NOx removing capacity.COPYRIGHT : (C)2007, JPO&INPIT