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Preparation method of low-temperature sulfur-resistant and water-resistant denitration catalyst

A denitrification catalyst and catalyst technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of low-temperature industrial boiler flue gas treatment, complex equipment, poor low-temperature activity, etc. problems, to achieve the effect of abundant raw materials, low cost, and lower activation temperature

Inactive Publication Date: 2017-06-23
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the SCR catalysts currently on the market at home and abroad operate at a temperature of 290-420°C. The low-temperature activity is poor, which will make the flue gas denitrification process and equipment complicated, and it is difficult to apply to the flue gas treatment of low-temperature industrial boilers. Low-temperature flue gas The sulfur dioxide and water vapor contained in the gas will lead to the deactivation of the catalyst

Method used

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  • Preparation method of low-temperature sulfur-resistant and water-resistant denitration catalyst
  • Preparation method of low-temperature sulfur-resistant and water-resistant denitration catalyst
  • Preparation method of low-temperature sulfur-resistant and water-resistant denitration catalyst

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Effect test

example 1

[0023] Dissolve 2g of oxalic acid, 1g of ammonium metavanadate and 3g of antimony trichloride in 40g of deionized water, and dissolve them all at 40°C; finally, 20g of TiO 2 Slowly add the carrier to the above solution, and make it viscous at 40°C; put the obtained viscous solid in an oven for drying, then put it in a muffle furnace, and make it viscous at 250°C Calcined for 2 hours, then calcined at 450°C for 5 hours, cooled naturally to room temperature, sieved to 20-120 mesh for later use, and obtained 1# catalyst.

example 2

[0025] Dissolve 6g of oxalic acid, 2g of ammonium metavanadate and 6g of antimony trichloride in 80g of deionized water, and dissolve them all at 40°C; finally, 40g of TiO 2 Slowly add the carrier to the above solution, and make it viscous at 40°C; put the obtained viscous solid in an oven for drying, then put it in a muffle furnace, and make it viscous at 250°C Calcined for 2 hours, then calcined at 450°C for 5 hours, cooled naturally to room temperature, sieved to 20-120 mesh for later use, and obtained 2# catalyst.

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Abstract

The invention discloses a preparation method of a low-temperature sulfur-resistant and water-resistant denitration catalyst, and belongs to the field of low-temperature denitration catalysts. The low-temperature sulfur-resistant and water-resistant denitration catalyst is prepared by an impregnation method by loading the surface of anatase-type titanium dioxide as a carrier with vanadium pentoxide and antimony trioxide, wherein TiO2 accounts for 60-90wt%, V2O5 accounts for 1-10wt% and Sb2O3 accounts for 5-30wt%. Precursors of the chemical components are as follows respectively: the precursor of V2O5 is ammonium metavanadate and the precursor of Sb2O3 is antimony trichloride. On the basis of an original vanadium titanium catalyst, through loading of the Sb2O3, the low-temperature sulfur-resistant and water-resistant denitration catalyst can not only maintain the efficiency being 90% or higher at 170-300 DEG C, but also has certain sulfur resistance and water resistance. By the preparation method, deactivation of the low-temperature sulfur-resistant and water-resistant denitration catalyst can be delayed; the preparation method is simple and high in reproducibility, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of low-temperature denitration catalysts, in particular to a preparation method of a low-temperature sulfur-resistant and water-resistant denitration catalyst. Background technique [0002] Nitrogen oxides (NO x ) is one of the main pollutants of air pollution, which can lead to photochemical smog, acid rain and smog, etc., seriously affecting human health. Therefore, the treatment and control of nitrogen oxides has been highly concerned by countries all over the world. Regardless of whether it is a stationary pollution source or a mobile pollution source, NH 3 selective catalytic reduction (NH 3 -SCR) technology has become an effective means of stationary source denitrification. Catalyst is the core of SCR technology and the main factor that determines the denitrification effect and economy of the whole system. However, most of the SCR catalysts currently on the market at home and abroad operate at a temperature...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01D53/86B01D53/90B01D53/56
CPCB01J23/22B01D53/8628B01D53/90B01D2258/0283B01J2523/00B01J2523/47B01J2523/43B01J2523/55
Inventor 李坚张铁军何洪梁文俊梁全明李春晓
Owner BEIJING UNIV OF TECH
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