NITROGEN OXIDE AMMONIA-FREE LOW-TEMPERATURE SELECTIVE REDUCTION CATALYST, PREPARATION METHOD THEREFOR, AND USES THEREOF

摘要

A nitrogen oxide ammonia-free low-temperature selective reduction catalyst, a preparation method therefor, and uses thereof. The catalyst comprises active components and carriers. The active components comprise manganese oxide and copper oxide. The mass percentages of the components in the catalyst are: manganese oxide accounts for 1-15%, copper oxide accounts for 1-8%, and carrier residues. The catalyst can satisfy a flue gas denitrification process in a low-temperature condition, and the ammonia as a reduction catalyst is not required when denitrification is conducted, and accordingly, processing costs of an enterprise can be effectively reduced. When flue gas denitrification is conducted by using the catalyst, CO and H2 comprised in flue gas can meet reduction requirements in the denitrification; even in the later stage of the processing, the denitrification is incomplete due to the activity reduction of the catalyst, the denitrification can be normally conducted by means of conversion of two denitrification reduction catalysis towers; in another denitrification reduction catalysis tower, NOx or nitrate or nitrite is reduced to N2 under the action of the introduction of water gas, and meanwhile, the objective of reactivating the catalyst is achieved.