Low-temperature denitration catalyst as well as preparation method and application thereof

Abstract

The invention discloses a low-temperature denitration catalyst as well as a preparation method and application thereof. The low-temperature denitration catalyst is a Mn-Ce bimetallic oxide catalyst loaded by a FeVO4 nanorod carrier, wherein the molar ratio of Ce to Mn to FeVO4 is equal to (0.05-0.4):(0.1-0.5):1, and after the active components Mn and Ce are loaded on the FeVO4 nanorod, CeVO3 is generated on the surface of the FeVO4 nanorod. The catalyst disclosed by the invention is FeVO4 nanorod loaded Mn-Ce bimetallic oxide, the surface of a FeVO4 nanorod carrier has abundant acidic sites and excellent reducing capacity, and meanwhile, compared with V2O5, the FeVO4 nanorod carrier has relatively low toxicity and relatively high thermal stability.

Description

technical field [0001] The invention belongs to the technical field of low-temperature denitration catalyst and its preparation, and in particular relates to a low-temperature denitration catalyst and its preparation method and application. Background technique [0002] NO x Emission control has become an urgent need for the country's major policy of "fighting the battle against pollution", for the following reasons: [0003] (1) Nitrogen oxides (NOx) emitted from coal combustion x ) can form acidic substances such as nitric acid with water and oxygen in the atmosphere, resulting in the formation of acid rain and acid fog, corroding nature, animals, plants, human buildings, etc., and causing adverse effects on the environment. [0004] (2)NO x After reaching the atmospheric stratosphere, it will consume ozone and break the balance between ozone and oxygen, resulting in the destruction of the ozone layer and bringing catastrophic effects on ecology, the atmosphere, animals...

AI Technical Summary

Problems solved by technology

[0003] (1) Nitrogen oxides (NOx) emitted from coal combustion x ) can form acidic substances such as nitric acid with water and oxygen in the atmosphere, which will lead to the formation of acid rain and acid fog, corrode nature, animals and plants, human buildings, etc., and have a bad impact on the environment

[0004] (2)NO x After reaching the atmospheric stratosphere, it will consume ozone and break the balance between ozone and oxygen, resulting in the destruction of the ozone layer and bringing catastrophic effects on ecology, the atmosphere, animals and plants, etc.

[0005] (3) When NO x When encountering HC emitted by motor vehicles, it can combine with it to cause the appearance of photochemical smog that is harmful to biological health, and is not conducive to the natural cycle of the atmospheric ecological environment

[0006] (4) NO in nitrogen oxides can combine with hemoglobin in the blood after entering the human body to affect the normal oxygen supply of the human body

[0009] Existing low-temperature denitrification catalysts have a narrow working temperature window and poor selectivity for high-temperature nitrogen

For example, since manganese oxides (MnO x ) at low temperature NH 3 -SCR reaction shows high catalytic performance, so manganese oxide is the current low-temperature NH 3 - The main research object of SCR catalyst; however, as a good low-temperature catalytic material, manganese oxide still has the defects of narrow working temperature window and poor nitrogen selectivity at high temperature

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