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Denitration catalyst using titanium dioxide as raw material and preparation method thereof

A denitration catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of localization of denitration catalyst raw materials, high cost, no independent production, etc., and achieve convenient source of raw materials , the effect of low price and low ammonia escape rate

Inactive Publication Date: 2009-04-01
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent uses tungsten-doped titanium powder or TiO with a specific specific surface area for commercial denitrification. 2 Powder, still unable to solve the problem of localization of raw materials for denitrification catalysts
[0007] In preparation V 2 o 5 -WO 3 / TiO 2 In the process of class denitrification catalyst, the carrier TiO 2 Is the key, at present, there is no commercial V 2 o 5 -WO 3 / TiO 2 TiO2-like denitrification catalyst requirements 2 preparation process, and there is no independent production of commercial V 2 o 5 -WO 3 / TiO 2 Due to the mature technology of similar denitrification catalysts, all the SCR denitrification catalysts installed in domestic power plants are imported from abroad, and the cost is very expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 257.37g TiO 2 The intermediate product metatitanic acid in the production process is added to 60ml of water and stirred in a water bath at 60°C to obtain the carrier TiO 2 The slurry; then weigh 14.07g of ammonium paratungstate and add it to the above slurry and continue to stir evenly. The amount of ammonium paratungstate added is equivalent to WO 3 later with TiO 2 The weight ratio is 1:10. The stirred slurry is dried in a drying oven at 100°C for 2 hours, and then calcined in a muffle furnace at 500°C for 5 hours. The calcined product is ground and sieved to obtain WO 3 / TiO 2 Powder; weigh 100g of WO below 100 mesh 3 / TiO 2 Powder and ammonium metavanadate, add 60ml of water and stir in a water bath at 80°C, the amount of ammonium metavanadate added is equivalent to V 2 o 5 Later with WO 3 / TiO 2 The weight ratio is 1:55; add additives including clay, methylcellulose, polyethylene oxide, silica sol, glass fiber, monoethanolamine during the stirring pro...

Embodiment 2

[0028] Weigh 257.37g TiO 2 The intermediate product metatitanic acid in the production process is added to 60ml of water and stirred in a water bath at 70°C to obtain the carrier TiO 2 The slurry; then weigh 11.258g of ammonium paratungstate and add it to the above slurry and continue to stir evenly. The amount of ammonium paratungstate added is equivalent to WO 3 later with TiO 2 The weight ratio is 2:25. The stirred slurry is dried in a drying oven at 100°C for 2 hours, and then calcined in a muffle furnace at 500°C for 5 hours. The calcined product is ground and sieved to obtain WO 3 / TiO 2 Powder; take 100g of powder below 100 mesh and ammonium metavanadate, add 60ml of water and stir in a water bath at 70°C, the amount of ammonium metavanadate added is equivalent to V 2 o 5 Later with WO 3 / TiO 2 The weight ratio is 1:50; add additives including clay, methylcellulose, polyethylene oxide, silica sol, glass fiber, monoethanolamine during the stirring process, and contin...

Embodiment 3

[0031] Weigh 257.37g TiO 2 The intermediate product metatitanic acid in the production process is added to 60ml of water and stirred in a water bath at 80°C to obtain the carrier TiO 2 The slurry; then weigh 7.04g of ammonium paratungstate and add it to the above slurry and continue to stir evenly. The amount of ammonium paratungstate added is equivalent to WO 3 later with TiO 2 The weight ratio is 1:20. The stirred slurry is dried in a drying oven at 100°C for 2 hours, and then calcined in a muffle furnace at 500°C for 5 hours. The calcined product is ground and sieved to obtain WO 3 / TiO 2 Powder; take 100g of powder below 100 mesh and ammonium metavanadate, add 60ml of water and stir in a water bath at 80°C, the amount of ammonium metavanadate added is equivalent to V 2 o 5 Later with WO 3 / TiO 2 The weight ratio is 1:55; add additives including clay, methylcellulose, polyethylene oxide, silica sol, glass fiber, monoethanolamine during the stirring process, and contin...

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Abstract

The invention belongs to the chemical material field, in particular to a denitration catalyst which uses TiO2 as raw material and a preparation method thereof. The catalyst comprises TiO2, V2O, WO3 and addition agent, wherein, TiO2 which is 70-90 percent of the catalyst in weight is used as carrier, V2O5 which is 0.6-2 percent of the catalyst in weight is used as an active component, WO3 which is 5-10 percent of the catalyst in weight is used as cocatalyst, and the rest is the addition agent. The preparation process of the catalyst comprises: titanium powder doped with tungsten is prepared and is added with the active component and the other addition agents to be dried and calcinated to obtain the denitration catalyst. The raw material source is convenient and the price is low. No pretreatment is required. The preparation process is simple. Through the denitration test under fixed bed simulation flue gas condition, the catalyst is proved to be provided with high denitration activity and low SO2 conversion rate and ammonia escaping rate.

Description

technical field [0001] The invention belongs to the field of chemical materials, in particular to a TiO 2 A denitrification catalyst as a raw material and a preparation method thereof. Background technique [0002] Nitrogen oxides (NOx) are the main gases that cause acid rain and photochemical smog, and are harmful to human health. Most of the large-scale power stations in my country are conventional coal-fired power stations, while NO X It is one of the main pollutants emitted by coal-fired power plants. In 2004, the NOx emission of coal-fired boilers in my country was 6.657 million tons. According to the research of the Chinese Academy of Environmental Sciences, by 2010, my country's nitrogen oxide emissions will reach more than 21 million tons. It is also estimated that for every 10 billion kwh increase in my country's power generation, the NOx emissions will increase by 39,000 to 88,000 tons. Ton. The rapid increase of nitrogen oxide emissions and the increase of atmo...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J23/22B01J21/06B01D53/56
Inventor 宋蔷姚强云端赵晓林马少丹孙海军
Owner TSINGHUA UNIV
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