Denitration catalyst, and preparation method

A technology of denitrification catalyst and parts by weight, which is applied in the field of denitrification catalyst, can solve the problems of high use cost and deactivation, and achieve the effects of low cost, improved thermal stability and simple preparation process

Inactive Publication Date: 2009-08-19
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the SCR catalysts used in industry are mainly V 2 o 5 / TiO 2 or V 2 o 5 -WO 3 / TiO 2 , it has been proved that these two catalysts have high durability and good reactivity, but are sensitive to sulfur and water vapor, and the catalyst will be worn, blocked by dust in the flue gas, and poisoned by arsenic, alkali metals and other substances , the inactivation is more serious, and the use cost is extremely high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Measure absolute ethanol with a molar ratio of 5:2:3, tetrabutyl titanate, and nitric acid with a concentration of 1mol / L. Then add the solution dropwise to the above-mentioned nitric acid, stir vigorously to form a transparent solution, then adjust the pH value to 2 with a NaOH solution with a concentration of 0.5mol / L, and stir fully at the same time until a transparent solution is formed. use. Take the purified bentonite, the amount of which is 8 times the number of moles of tetrabutyl titanate, and fully infiltrate it with water, then add cetyltrimethylammonium bromide, whose mole number is 10 times that of bentonite, and react for 12 hours after fully stirring , then add dodecylamine whose molar number is 10 times that of bentonite, continue to react for 24 hours, mix it with the transparent solution prepared above, stir vigorously at 80°C for 2 hours, and then add a molar amount of tetrabutyl titanate 0.5 times the magnesium nitrate and copper nitrate of the este...

Embodiment 2

[0016] Measure absolute ethanol with a molar ratio of 15:5:3, tetrabutyl titanate, and nitric acid with a concentration of 1mol / L. Then add the solution dropwise to the above-mentioned nitric acid, stir vigorously to form a transparent solution, then adjust the pH value to 2 with a NaOH solution with a concentration of 0.5mol / L, and stir fully at the same time until a transparent solution is formed. use. Take the purified bentonite, the amount of which is 20 times the number of moles of tetrabutyl titanate, and fully infiltrate it with the same quality of water, then add cetyltrimethylammonium bromide, whose number of moles is 5 times that of bentonite, and stir thoroughly After reacting for 12 hours, add dodecylamine whose molar number is 5 times that of bentonite. After continuing to react for 12 hours, mix it with the transparent solution prepared above, stir vigorously at 60°C for 2 hours, and then add a molar amount of titanium Magnesium nitrate and copper nitrate 1.0 ti...

Embodiment 3

[0018] Measure absolute ethanol with a molar ratio of 12:3:5, tetrabutyl titanate, and nitric acid with a concentration of 1mol / L. Then add the solution dropwise to the above-mentioned nitric acid, stir vigorously to form a transparent solution, then adjust the pH value to 2 with a NaOH solution with a concentration of 0.5mol / L, and stir fully at the same time until a transparent solution is formed. use. Take the purified bentonite, the amount of which is 15 times the number of moles of tetrabutyl titanate, and fully infiltrate it with the same quality of water, then add cetyltrimethylammonium bromide, whose number of moles is 5 times that of bentonite, and stir thoroughly After reacting for 24 hours, add dodecylamine whose molar number is 10 times that of bentonite. After continuing to react for 12 hours, mix it with the transparent solution prepared above, stir and react vigorously at 80°C for 6 hours, and then add a molar amount of titanium Magnesium nitrate and copper nit...

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Abstract

The invention discloses a denitration catalyst, which is composed of the following components: 30-70 parts by weight of bentonite, 5-20 parts by weight of TiO2, 5-10 parts by weight of Fe2O3, and 5-15 parts by weight of CuO , 3-6 parts by weight of water. The invention also discloses a preparation method of the above-mentioned denitration catalyst. The invention composes multiple oxides based on the nano-layer structure of natural bentonite, makes the catalyst porous and achieves low-cost large-scale industrial application. When the mixture of NOx / NH3 enters the well-developed pore structure on the surface of the catalyst and undergoes a reduction reaction with the catalyst to generate N2 and H2O, the product gas can escape easily, which is very beneficial to the denitrification reaction. The preparation process of the invention is simple and controllable, and the cost is very low. The invention not only improves the thermal stability and water vapor resistance performance of the denitrification catalyst, but also is environmentally friendly.

Description

technical field [0001] The invention relates to a denitration catalyst and a method for preparing the denitration catalyst by using multiple oxides and bentonite. Background technique [0002] my country's coal consumption is large, and the environmental pollution caused by it is particularly serious. Except for SO 2 In addition to smoke and dust, NOx nitrogen oxides are also the main pollutants. The current situation of NOx nitrogen oxide emissions from coal-fired power plants in my country is that the emissions in 1995 were 2.65 million tons, in 2000 it was 4.69 million tons, in 2002 it was 5.2 million tons, and it is expected to reach 5.5 million tons by 2010. become the most important pollutant emission of thermal power generation. Nitrogen oxides are poisonous and harmful gases. Direct inhalation by the human body will damage the central nervous system and lung tissue. Under certain conditions, NOx in the atmosphere will also generate more toxic photochemical smog, cau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J23/72B01J21/06B01J21/16B01D53/56
Inventor 豆斌林陈兵兵姜犇郑丹榆
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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