Vanadium-modified iron-based activated carbon catalyst, preparation method and application thereof

A technology of activated carbon and catalyst, which is applied in the field of low-temperature iron-vanadium activated carbon catalyst, which can solve the problems of poor selectivity and sulfur resistance, susceptibility to sulfur poisoning, poor hydrothermal stability, etc., and achieves low price, reduced preparation cost, and operating temperature window wide effect

Inactive Publication Date: 2014-05-07
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although Mn-based catalysts have remarkable low-temperature activity, their N 2 Poor selectivity and sulfur resistance; Fe and Ce-based oxide catalysts have good high-temperature activity, but are prone to sulfur poisoning; Fe and Cu-based molecular sieve catalysts have superior performance, but they are still expensive, poor hydrothermal stability and sulfur resistance Disadvantages such as low performance

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  • Vanadium-modified iron-based activated carbon catalyst, preparation method and application thereof
  • Vanadium-modified iron-based activated carbon catalyst, preparation method and application thereof

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Effect test

Embodiment 1

[0030] A vanadium-modified iron-based activated carbon catalyst, the active components of the catalyst are iron oxide and vanadium pentoxide, the carrier is activated carbon, the mass percentage of the iron oxide accounted for activated carbon is 3%, and the vanadium pentoxide accounts for The mass percentage of activated carbon is 0.3%.

[0031] The preparation method of the iron-based activated carbon catalyst modified by vanadium as described above, the method is a co-impregnation method, comprising the steps of:

[0032] (1) Use nitric acid to oxidize the surface of activated carbon;

[0033] (2) In the presence of oxalic acid, the mixture of ferric nitrate, ammonium metavanadate and oxidized activated carbon was stirred at room temperature for 2 hours, evaporated to dryness at 60°C by a rotary evaporator, dried at 110°C for 12 hours, and then placed in a tube Calcined at 500°C for 5 h in a nitrogen atmosphere in a type furnace to obtain a vanadium-modified iron-based act...

Embodiment 2

[0035] A vanadium-modified iron-based activated carbon catalyst, the active components of the catalyst are iron oxide and vanadium pentoxide, the carrier is activated carbon, the mass percentage of the iron oxide accounted for activated carbon is 3%, and the vanadium pentoxide accounts for The mass percentage of activated carbon is 0.5%.

[0036] The preparation method of the iron-based activated carbon catalyst modified by vanadium as described above, the method is a co-impregnation method, comprising the steps of:

[0037] (1) Use nitric acid to oxidize the surface of activated carbon;

[0038] (2) In the presence of oxalic acid, the mixture of ferric nitrate, ammonium metavanadate and oxidized activated carbon was stirred at room temperature for 2 hours, evaporated to dryness at 60°C by a rotary evaporator, dried at 110°C for 12 hours, and then placed in a tube Calcined at 500°C for 5 h in a nitrogen atmosphere in a type furnace to obtain a vanadium-modified iron-based act...

Embodiment 3

[0040] A vanadium-modified iron-based activated carbon catalyst, the active components of the catalyst are iron oxide and vanadium pentoxide, the carrier is activated carbon, the mass percentage of the iron oxide accounted for activated carbon is 3%, and the vanadium pentoxide accounts for The mass percent of activated carbon is 0.7%.

[0041] The preparation method of the iron-based activated carbon catalyst modified by vanadium as described above, the method is a co-impregnation method, comprising the steps of:

[0042] (1) Use nitric acid to oxidize the surface of activated carbon;

[0043] (2) In the presence of oxalic acid, the mixture of ferric nitrate, ammonium metavanadate and oxidized activated carbon was stirred at room temperature for 2 hours, evaporated to dryness at 60°C by a rotary evaporator, dried at 110°C for 12 hours, and then placed in a tube Calcined at 500°C for 5 h in a nitrogen atmosphere in a type furnace to obtain a vanadium-modified iron-based activate...

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Abstract

The invention discloses a vanadium-modified iron-based activated carbon catalyst which comprises active components which are ferric oxide and vanadium pentoxide. Activated carbon serves as a carrier; the mass percentage of the vanadium pentoxide in the activated carbon is larger than 0 percent and smaller than or equal to 1 percent. The vanadium-modified iron-based activated carbon catalyst obtained by adding vanadium is excellent in low-temperature NH3-SCR (silicon controlled rectifier) activity and SO2 poisoning resistance; an operation temperature window is wide. Under 150 DEG C, the NOx purification efficiency of the catalyst is over 70 percent; under 175 DEG C, the NOx purification efficiency is over 80 percent; furthermore, under 200 DEG C, the catalyst is high in SO2 poisoning resistance.

Description

technical field [0001] The invention relates to a low-temperature iron-vanadium activated carbon catalyst with high sulfur resistance performance, a preparation method and an application, and in particular to a vanadium-modified iron-based activated carbon catalyst, a preparation method and an application. Background technique [0002] NO x It is one of the main pollution pollutants of the atmosphere, which can cause acid rain, photochemical pollution and destroy the ozone layer, seriously threatening human production and life. my country is a developing country that mainly burns coal, and almost 37% of NO x Emissions from stationary sources such as thermal power generation and boiler combustion have caused serious air pollution. Therefore, industrial furnace NO x Emission control technology becomes a priority. [0003] Take NH 3 The SCR technology for selective catalytic reduction of NOx by reducing agent has been extensively studied, and the traditional V 2 o 5 -WO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01D53/90B01D53/56
Inventor 贺泓杨卫卫刘福东石晓燕
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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