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Low-temperature sulfur-resistant molybdenum-vanadium-titanium denitration catalyst as well as preparation method and application thereof

A denitration catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as shortening the service life of catalysts, achieve excellent low temperature sulfur resistance, short preparation time, and improve service life. Effect

Inactive Publication Date: 2019-06-07
BEIJING CHANGXIN TAIHE ENERGY SAVING TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the denitrification catalysts on the domestic and foreign markets have a working temperature of 300-400°C, which is a medium-temperature catalyst. However, for the treatment of low-temperature flue gas such as some industrial boilers, complex heat exchanger systems are required. Under low-temperature flue gas conditions, the flue gas SOx in the catalyst 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 molybdenum-vanadium-titanium denitration catalyst as well as preparation method and application thereof
  • Low-temperature sulfur-resistant molybdenum-vanadium-titanium denitration catalyst as well as preparation method and application thereof
  • Low-temperature sulfur-resistant molybdenum-vanadium-titanium denitration catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 3g of oxalic acid and 1g of ammonium metavanadate in 40g of deionized water, stir and dissolve at 50°C until it becomes a blue clear solution; mix 1.5g of ammonium molybdate, 0.3g of triammonium phosphate and 0.1g Ruthenium trichloride was added to the resulting solution in turn, and continued to stir at 50°C until it completely dissolved until it became a black solution; 20gTiO 2 The carrier is slowly added to the above solution, and stirred at 40°C until it becomes viscous; the obtained viscous solid is dried in an oven, then put into a muffle furnace, and heated 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.

Embodiment 2

[0032] Dissolve 3g of oxalic acid and 2g of ammonium metavanadate in 80g of deionized water, and stir to dissolve at 50°C until it becomes a blue clear solution; 3g of ammonium molybdate, 0.6g of triammonium phosphate and 0.25g of Add ruthenium chloride to the resulting solution in turn, continue to stir at 50°C, and dissolve all until it becomes a black solution; add 40gTiO 2 The carrier is slowly added to the above solution, and stirred at 40°C until it becomes viscous; the obtained viscous solid is dried in an oven, then put into a muffle furnace, and heated 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.

Embodiment 3

[0034] Dissolve 6g of oxalic acid and 2g of ammonium metavanadate in 80g of deionized water, and stir to dissolve at 50°C until it becomes a blue clear solution; 3g of ammonium molybdate, 0.6g of triammonium phosphate and 0.25g of Add ruthenium chloride to the resulting solution one by one, continue to stir at 50°C until it completely dissolves until it turns into a black solution; slowly add 40g of TiO2 carrier to the above solution, and stir at 40°C until it becomes viscous The viscous solid obtained is first put into an oven for drying, then put into a muffle furnace, and bake at 250°C for 2 hours, then at 450°C for 5 hours, and cool to room temperature naturally. Sieve to 20-120 mesh for later use to obtain 3# catalyst.

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Abstract

The invention discloses a low-temperature sulfur-resistant molybdenum-vanadium-titanium denitration catalyst as well as a preparation method and application thereof, and belongs to the field of denitration catalysts. The catalyst comprises the following components: catalyst carrier TiO2, active component V2O5, and auxiliary agent MoO3, P2O5 and RuO2. According to the catalyst provided by the invention, an impregnation method is adopted to prepare the V2O5, MoO3, P2O5 and RuO2 supported denitration catalyst, and the catalyst is mainly applied to removal of nitrogen oxides in flue gas at a low temperature; through loading of microelements of precious metals, high-activity denitration under low-temperature flue gas can be realized, deactivation of the catalyst is slowed down, and the servicelife of the catalyst is improved; and moreover, the preparation method of the denitration catalyst is simple and easy to operate, has high production efficiency, and can lay a foundation for industrialized applications in future.

Description

technical field [0001] The invention relates to the technical field of low-temperature denitration catalysts, and more specifically relates to a low-temperature sulfur-resistant molybdenum-vanadium-vanadium-titanium series denitration catalyst, a preparation method and an application thereof. 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. 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. [0003] At present, most of the denitrification catalysts on the domestic and foreign markets have a working temperature of 300...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/16B01D53/86B01D53/56
Inventor 仝明从明耀陈昕吴小东
Owner BEIJING CHANGXIN TAIHE ENERGY SAVING TECH CO LTD
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