Method for improving water resistance and sulfur resistance of manganese-based low-temperature SCR denitration catalyst

A technology of SCR catalyst and denitrification catalyst, which is applied in the field of preparing water-resistant and sulfur-resistant catalysts, can solve problems such as difficult application, and achieve excellent water-resistant effects

Pending Publication Date: 2019-03-29
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although some catalyst systems have good water resistance, it is still difficult to apply to waste incineration and natural gas combustion flue gas denitrification treatment with a water content as high as 20-30% (v / v), especially when the catalyst operating temperature is lower than 200 ℃, its water resistance is more important

Method used

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  • Method for improving water resistance and sulfur resistance of manganese-based low-temperature SCR denitration catalyst
  • Method for improving water resistance and sulfur resistance of manganese-based low-temperature SCR denitration catalyst
  • Method for improving water resistance and sulfur resistance of manganese-based low-temperature SCR denitration catalyst

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Effect test

Embodiment 1

[0016] Embodiment 1: 0.25g PTFE is dispersed in the container that 200ml dehydrated alcohol is housed, stirs 2h, adds 4gMnO 2 , stirred at room temperature for 10 hours, filtered, dried in an oven at 120°C, and calcined in a muffle furnace at 200°C for 2 hours to prepare SCR water-resistant and sulfur-resistant catalysts.

Embodiment 2

[0017] Embodiment 2: according to the preparation method of embodiment 1, 0.5g PTFE is dispersed in the container that 200ml dehydrated alcohol is housed, stirs 2h, adds 4g MnO 2 , stirred at room temperature for 10 hours, filtered, dried in an oven at 120°C, and calcined in a muffle furnace at 200°C for 2 hours to prepare SCR water-resistant and sulfur-resistant catalysts.

Embodiment 3

[0018] Embodiment 3: according to the preparation method of embodiment 1, 0.75g PTFE is dispersed in the container that 200ml dehydrated alcohol is housed, stirs 2h, adds 4g MnO 2 , stirred at room temperature for 10 hours, filtered, dried in an oven at 120°C, and calcined in a muffle furnace at 200°C for 2 hours to prepare SCR water-resistant and sulfur-resistant catalysts.

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Abstract

The invention relates to a method for improving water resistance and sulfur resistance of a manganese-based low-temperature SCR denitration catalyst, which belongs to the technical field of a water-resistant sulfur-resistant catalyst. The hydrophobic polytetrafluoroethylene is used as a coating or a dopant, is simply dispersed in a reaction vessel containing anhydrous ethanol, and then is mixed with the manganese-based catalyst, and steps of filtering, drying and calcining are carried out to obtain the manganese-based low-temperature SCR denitration catalyst. The method of the invention has the advantages of simple process, low cost, no toxicity and no pollution, and can prepare the manganese-based low-temperature SCR catalyst with excellent water and sulfur resistance.

Description

technical field [0001] The invention discloses a method for improving the water resistance and sulfur resistance of a manganese-based low-temperature SCR denitrification catalyst, which is particularly suitable for preparing a manganese-based low-temperature SCR denitration catalyst with excellent water resistance and sulfur resistance performance, and belongs to the technical field of preparing water-resistant and sulfur-resistant catalysts. Background technique [0002] At present, selective catalytic reduction (SCR) is the mainstream method for removing nitrogen oxides, and the denitrification efficiency can reach more than 90%. It is widely used and the technology is relatively mature. V 2 o 5 –WO 3 (MoO 3 ) / TiO 2 As a typical commercial SCR catalyst, the catalyst has been widely used in power plants, steel mills, glass kilns and other fields. However, since the working temperature of the traditional SCR is generally 300–400°C or even higher, SO will occur in the fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/32B01D53/86B01D53/56
CPCB01D53/8628B01J31/32B01D2251/2062B01D2258/0283
Inventor 何洪张宁强李伶聪宋丽云孙炎明程杰李世宁
Owner BEIJING UNIV OF TECH
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