Low-temperature SCR smoke denitration catalyst of carbon nano tube load metallic oxide and preparation method thereof

Abstract

The invention belongs to the field of environmental protection and environmental catalysis, and in particular relates to a low-temperature SCR smoke denitration catalyst of a carbon nano tube load metallic oxide. The low-temperature SCR smoke denitration catalyst is characterized in that a multi-wall carbon nanotube is utilized as a carrier, ZrO2 is utilized as a sleep-assisting agent, MnOx is utilized as an active component, and a low-temperature smoke denitration catalyst based on a carbon nano tube is obtained. The low-temperature SCR smoke denitration catalyst provided by the invention has the advantages that a ZrO2 surface modification multi-wall carbon nanotube is adopted, a specific surface area, heat stability and acidity of the catalyst are increased, the denitration activity of the catalyst is improved through the interaction of the MnOx, the ZrO2 and the multi-wall carbon nanotube, the ammonia is utilized as a reducing agent, and the low-temperature SCR smoke denitration catalyst has the good catalytic activity when the temperature is 180-280 DEG C.

Description

technical field [0001] The invention belongs to the field of environmental protection and environmental catalysis, and in particular relates to a novel low-temperature SCR flue gas denitrification catalyst supported by metal oxides on carbon nanotubes. Background technique [0002] Nitrogen oxides (NO x ) is one of the main air pollutants. In addition to directly endangering human health, it is also one of the important precursors for generating ozone, and is also an important cause of regional haze and fine particle pollution. Nitrogen oxides mainly come from the combustion of fossil fuels. According to statistics, 66.7% of the national industrial nitrogen oxides emissions come from the power and heat production and supply industries, which are the largest emitters of nitrogen oxides in my country. Among them, the thermal power industry’s nitrogen oxides contribute Therefore, the power industry is the key field for controlling nitrogen oxide emissions in my country. Among...

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Problems solved by technology

[0003] Catalysts are the key to SCR flue gas denitrification technology. At present, commercial SCR catalysts are mainly V 2 o 5 –WO 3 (MoO 3 ) / TiO 2 series of catalysts, the active temperature window is 300-400 ° C, due to the high temperature required, the SCR denitration device is generally placed before the dust removal and desulfurization device, so the catalyst is easily washed and blocked by dust, and the service life is reduced

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