B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 33/00 (2006.01) B01D 53/56 (2006.01) B01D 53/86 (2006.01) B01J 37/02 (2006.01) B01J 21/06 (2006.01) B01J 23/22 (2006.01) B01J 23/24 (2006.01)
Patent
CA 2265479
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.
L'invention porte sur un catalyseur de dénitrification, servant à réduire les oxydes d'azote présents dans des fumées contenant des sels fortement déliquescents tels que des poussières liées à de l'ammoniac et revêtus d'une couche poreuse faite d'un mélange d'une résine organique hydrophobe, et de particules de catalyseur. Le catalyseur de dénitrification peut par exemple se préparer en revêtant la surface d'un catalyseur de dénitrification avec une dispersion aqueuse d'une résine organique hydrophobe à faible concentration, puis en faisant sécher le revêtement de manière à former un revêtement poreux de résine organique hydrophobe. Ledit catalyseur de dénitrification même utilisé pour traiter des fumées riches en cendres contenant des sels fortement déliquescents empêche lesdits sels de traverser la couche poreuse hydrophobe pour atteindre le catalyseur. Cela évite la détérioration du catalyseur et permet de maintenir une forte activité catalytique sur une longue période.
Imada Naomi
Kato Yasuyoshi
Babcock-Hitachi Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
LandOfFree
Denitration catalyst, process for preparing the same, and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Denitration catalyst, process for preparing the same, and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Denitration catalyst, process for preparing the same, and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1746373