Low-temperature sulfur-resistant vanadium-titanium denitration catalyst and preparing method

A catalyst and catalyst carrier technology, applied in the direction of catalyst carriers, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of shortening the service life of catalysts, accelerating catalyst deactivation, etc., and achieve short preparation time and reduce Toxic effect, effect of improving service life

Inactive Publication Date: 2016-11-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the denitrification catalysts on the domestic and foreign markets work at a temperature of 290-400°C, which are medium-temperature catalysts. The treatment of low-temperature flue gas from some industrial boilers requires complex heat exchanger systems.
Under low temperature flue gas conditions, SO in flue gas x It will form sulfates to poison the catalyst, accelerate the deactivation of the catalyst, and shorten the service life of the catalyst

Method used

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  • Low-temperature sulfur-resistant vanadium-titanium denitration catalyst and preparing method
  • Low-temperature sulfur-resistant vanadium-titanium denitration catalyst and preparing method
  • Low-temperature sulfur-resistant vanadium-titanium denitration catalyst and preparing method

Examples

Experimental program
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Effect test

example 1

[0026] Dissolve 3g of oxalic acid and 1g of ammonium metavanadate in 40g of deionized water, and dissolve them all at 40°C; add 1.5g of ammonium tungstate and 0.1g of ruthenium trichloride to the resulting solution in turn, and continue to dissolve at 40°C Conditions to make it all dissolved; finally 20gTiO 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

[0028] Dissolve 6g of oxalic acid and 2g of ammonium metavanadate in 80g of deionized water, and dissolve them all at 40°C; add 3g of ammonium tungstate and 0.2g of ruthenium trichloride to the resulting solution in turn, and continue to dissolve at 40°C Make it all dissolve under; Finally, 40gTiO 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.

example 3

[0030] Dissolve 6g of oxalic acid and 2g of ammonium metavanadate in 80g of deionized water, and dissolve them all at 40°C; add 3g of ammonium tungstate and 0.25g of ruthenium trichloride to the resulting solution in turn, and continue to dissolve at 40°C Make it all dissolve under; Finally, 40gTiO 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 3# catalyst.

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Abstract

A low-temperature sulfur-resistant vanadium-titanium denitration catalyst and a preparing method are disclosed and belong to the field of denitration catalysts. The low-temperature sulfur-resistant vanadium-titanium denitration catalyst is prepared with a steeping method, anatase type titanium dioxide serves as a carrier, and vanadium pentoxide, tungsten trioxide and ruthenium are loaded on the surface of the carrier, wherein TiO2 accounts for 70-95 wt%, V2O5 accounts for 0-10 wt%, WO3 accounts for 0-20 wt%, and Ru accounts for 0.1-0.8 wt%. The chemical composition precursors of V2O5, WO3 and Ru are ammonium metavanadate, ammonium tungstate and ruthenium trichloride respectively. By loading trace precious metal elements, the denitration catalyst can maintain the efficiency of 90% or above at 150-400 DEG C, and the toxic action of sulfates formed by Sox in the sulfur-containing smoke atmosphere on the catalyst can be relieved. The service life of the catalyst can be prolonged, the preparing method is easy and convenient to implement, and the production efficiency is high.

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 vanadium-titanium series denitration catalyst. Background technique [0002] Nitrogen oxide is one of the main sources of air pollution, and it is also a major factor that directly leads to smog, ozone destruction, and air pollution in various parts of our country. The Selective Catalytic Reduction (SCR) technology using ammonia as the reducing agent is the most mature and efficient technology in flue gas denitrification technology. [0003] The denitrification catalyst is the core of this technology, and its performance is the main factor that determines the denitrification effect and economy of the whole system. At present, most of the denitrification catalysts on the domestic and foreign markets have a working temperature of 290-400°C, and are medium-temperature catalysts. The treatment of low-temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652B01D53/86B01D53/56
CPCB01J32/00B01D53/8628B01D2258/0283B01J23/652B01J2523/00B01J2523/55B01J2523/69B01J2523/47
Inventor 李坚张铁军何洪梁文俊梁全明曹子雄
Owner BEIJING UNIV OF TECH
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