公开(公告)号：EP0937500B1

公开(公告)日：2005-08-17

申请号：EP98931027.1

申请日：1998-07-09

申请人： Babcock Hitachi K.K.

发明人： IMADA, Naomi, Kure Res. Lab. of Babcock-Hitachi KK ,  KATO, Yasuyoshi, Kure Res. Lab. of Babcock-Hitachi

IPC分类号： B01J33/00 ,  B01D53/56 ,  B01D53/86

CPC分类号： B01J33/00 ,  B01D53/8628 ,  B01J21/063 ,  B01J23/22 ,  B01J23/24 ,  B01J37/0219 ,  B01J37/0244 ,  Y10S502/507

摘要： A denitration catalyst for use in the reduction of nitrogen oxides contained in an exhaust gas containing highly deliquescent salts as dust with ammonia, which bears thereon a porous coating of a water-repellent organic resin, a porous coating of a mixture of a water-repellent organic resin with inorganic oxide particles, or a porous coating of a mixture of a water-repellent organic resin with catalyst component particles. The denitration catalyst can be prepared, for example, by coating the surface of a denitration catalyst with an aqueous dispersion containing a water-repellent organic resin having a lower concentration, drying the coating, further coating the dried coating with an aqueous dispersion containing a water-repellent organic resin having a higher concentration, and then drying the coating to form a porous coating of a water-repellent organic resin. This denitration catalyst, even when used in the treatment of an exhaust gas containing ash containing highly deliquescent salts, enables the water-repellent porous coating formed on the surface to prevent the salts that have deliquesced from entering the catalyst. This can prevent the deterioration of the catalyst and enables a high catalytic activity to be maintained for a long period of time.

公开(公告)号：EP0937500A1

公开(公告)日：1999-08-25

申请号：EP98931027.1

申请日：1998-07-09

申请人： Babcock Hitachi K.K.

发明人： IMADA, Naomi, Kure Res. Lab. of Babcock-Hitachi KK ,  KATO, Yasuyoshi, Kure Res. Lab. of Babcock-Hitachi

IPC分类号： B01J33/00 ,  B01D53/56

CPC分类号： B01J33/00 ,  B01D53/8628 ,  B01J21/063 ,  B01J23/22 ,  B01J23/24 ,  B01J37/0219 ,  B01J37/0244 ,  Y10S502/507

摘要： A denitration catalyst for use in the reduction of nitrogen oxides contained in an exhaust gas containing highly deliquescent salts as dust with ammonia, which bears thereon a porous coating of a water-repellent organic resin, a porous coating of a mixture of a water-repellent organic resin with inorganic oxide particles, or a porous coating of a mixture of a water-repellent organic resin with catalyst component particles. The denitration catalyst can be prepared, for example, by coating the surface of a denitration catalyst with an aqueous dispersion containing a water-repellent organic resin having a lower concentration, drying the coating, further coating the dried coating with an aqueous dispersion containing a water-repellent organic resin having a higher concentration, and the drying the coating to form a porous coating of a water-repellent organic resin. This denitration catalyst, even when used in the treatment of an exhaust gas containing ash containing highly deliquescent salts, enables the water-repellent porous coating formed on the surface to prevent the salts that have deliquesced from entering the catalyst. This can prevent the deterioration of the catalyst and enables a high catalytic activity to be maintained for a long period of time.

摘要翻译： 一种脱硝催化剂，其用于还原包含在含有高度潮解性盐的废气中的氮氧化物作为灰尘，其上承载有防水有机树脂的多孔涂层，防水剂的混合物的多孔涂层 无机氧化物颗粒的有机树脂或防水有机树脂与催化剂组分颗粒的混合物的多孔涂层。 脱硝催化剂可以例如通过用含有较低浓度的拒水性有机树脂的水性分散体涂布脱硝催化剂的表面来制备，干燥涂层，进一步用含有水的水分散体涂覆干燥的涂层 - 具有较高浓度的有机树脂，并且干燥该涂层以形成防水有机树脂的多孔涂层。 该脱硝催化剂即使在用于处理含有高度潮解性盐的灰分的废气时也能够使表面上形成的防水多孔涂层防止已被潮解的盐进入催化剂。 这可以防止催化剂的劣化，并且能够长期保持高的催化活性。