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Activated carbon carrier iron-based NH3-SCR catalyst as well as preparation method and application thereof

A technology of NH3-SCR and catalyst, which is applied in the field of low-temperature denitrification catalytic materials, can solve the problems of low catalyst price, inability to meet the cost at the same time, and high low-temperature denitrification ability, and achieve low-cost components, high and low-temperature activity, and good low-temperature activity. Effect

Pending Publication Date: 2021-05-21
MCC CAPITAL ENGINEERING & RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The first object of the present invention is to provide a kind of activated carbon carrier iron-based NH 3 -SCR catalyst; the price and cost of this catalyst are low, and the low-temperature denitrification ability is high, which solves the problem that the existing technology cannot meet the requirements of low cost and guaranteed denitrification ability at the same time

Method used

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  • Activated carbon carrier iron-based NH3-SCR catalyst as well as preparation method and application thereof
  • Activated carbon carrier iron-based NH3-SCR catalyst as well as preparation method and application thereof
  • Activated carbon carrier iron-based NH3-SCR catalyst as well as preparation method and application thereof

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Embodiment 1

[0047] This embodiment provides an activated carbon carrier iron-based NH 3 -The preparation method of SCR catalyst, comprises the steps:

[0048] 1) Add one of 2.42g of ferric nitrate, 1.31g of sodium tungstate, and 17.20g of woody activated carbon into 50g of deionized water, and heat in a water bath at 70°C until completely dissolved to obtain a mixed solution;

[0049] 2) Add 0.62gNa to the mixed solution 2 S, and add ammonia water to adjust the pH value to 10 to obtain a precipitate;

[0050] 3) Centrifuge the sediment at 4000r / min for 3min, dry the sediment in an oven at 80°C for 24h, grind to 40-60 mesh after drying, and obtain sample particles;

[0051] 4) Calcinate the precipitate particles at 420°C for 5 hours under a nitrogen atmosphere, and grind to 40-60 mesh after roasting to obtain the activated carbon carrier iron-based NH 3 - SCR catalyst; in this catalyst, Fe 2 o 3 Accounting for 4wt% of the total mass of the catalyst, WO 3 Accounting for 6wt% of the to...

Embodiment 2

[0053] This embodiment provides an activated carbon carrier iron-based NH 3 -The preparation method of the SCR catalyst, the steps of the method are the same as in Example 1, the only difference is that in step 1), 17.20 g of coal-based activated carbon is used instead of 17.20 g of woody activated carbon. The activated carbon carrier iron-based NH obtained in this embodiment 3 -In SCR catalysts, Fe 2 o 3 Accounting for 4wt% of the total mass of the catalyst, WO 3 Accounting for 6wt% of the total mass of the catalyst; the catalyst is named 4wt% Fe according to the type of activated carbon carrier 2 o 3 -6wt% WO 3 / AC (coal quality).

Embodiment 3

[0055] This embodiment provides an activated carbon carrier iron-based NH 3 -The preparation method of the SCR catalyst, the steps of the method are the same as in Example 1, the only difference is that the amount of iron nitrate in step 1) is 3.63g. The activated carbon carrier iron-based NH obtained in this embodiment 3 -In SCR catalysts, Fe 2 o 3 Accounting for 6wt% of the total mass of the catalyst, WO 3 Accounting for 6wt% of the total mass of the catalyst; the catalyst is named 6wt% Fe according to the type of activated carbon carrier 2 o 3 -6wt% WO 3 / AC (wooden).

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Abstract

The invention discloses an activated carbon carrier iron-based NH3-SCR catalyst as well as a preparation method and application thereof. The activated carbon carrier iron-based NH3-SCR catalyst comprises activated carbon particles serving as a carrier and a metal oxide loaded on the activated carbon particles, the metal oxide comprises an iron oxide and a tungsten oxide, or comprises an iron oxide, a cerium oxide and a tungsten oxide; wherein the iron oxide accounts for 4-8wt% of the total mass of the catalyst, the cerium oxide accounts for 0-3wt% of the total mass of the catalyst, and the tungsten oxide accounts for 4-8wt% of the total mass of the catalyst. The invention further provides a preparation method of the activated carbon carrier iron-based NH3-SCR catalyst and application of the activated carbon carrier iron-based NH3-SCR catalyst in removal of nitric oxide from flue gas. The activated carbon carrier iron-based NH3-SCR catalyst provided by the invention has good low-temperature activity, and has NOx removal efficiency of 90% or above at 150-280 DEG C.

Description

technical field [0001] The invention relates to the technical field of low-temperature denitrification catalytic materials. More specifically, it relates to an activated carbon carrier iron-based NH 3 -SCR catalyst and its preparation method and application. Background technique [0002] Nitrogen oxides (NO x ) mainly comes from stationary sources such as iron and steel enterprises, electric power enterprises, and industrial kilns. Selective catalytic reduction of ammonia (NH 3 -SCR) technology is currently one of the best technologies for removing NOx, and its core is a denitrification catalyst. Currently, V 2 o 5 -WO 3 / TiO 2 Denitrification catalysts are widely used in power plants. The main advantages are high activity and good sulfur resistance. However, the denitrification temperature window is only 300-400°C, while the flue gas temperature of many industrial furnaces is 200-250°C, which is lower than that of power plants. . When the flue gas outlet temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01D53/86B01D53/56
CPCB01J23/888B01J23/002B01D53/8628B01J2523/00B01J2523/3712B01J2523/69B01J2523/842Y02C20/10
Inventor 李春晓邱明英王建华崔岩张宇鑫任乐
Owner MCC CAPITAL ENGINEERING & RESEARCH
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