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Preparation method for environment-friendly denitrification catalyst

A technology of denitrification catalyst and pyrite slag, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high production cost and hinder application, and achieve the purpose of increasing surface area and weakening mutual Function, improve the effect of void structure

Active Publication Date: 2018-03-02
安徽金森源环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the SCR catalysts developed in my country are mainly anatase TiO 2 Or molecular sieve as a carrier catalyst, but its high production cost hinders its wide application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Pyrite slag pretreatment: crush the pyrite slag raw material, screen out 60-80 mesh pyrite slag, dissolve it in dilute nitric acid solution with a mass concentration of 2%, and filter it after stirring at room temperature for 6 hours. Filter and wash the filtered (ie undissolved) pyrite slag until neutral, then dry it at 105°C for 12 hours;

[0023] 2) Pyrite slag modification: Weigh 100g of sucrose and dissolve it in 200mL of deionized water and stir at room temperature to dissolve it completely to obtain a sucrose solution; then add 100g of the pyrite slag obtained in step 1) to the sucrose solution And continue stirring for 10 minutes to obtain mixture A; transfer mixture A to a hydrothermal reactor, and treat it at 220 ° C for 2 hours to obtain mixture B; filter the filter cake obtained by filtering mixture B and wash it with ethanol for 4 times, then After drying for 6 hours under the condition of ℃, roasting under the nitrogen atmosphere of 500 ℃ for 4 hours to...

Embodiment 2

[0026] 1) Pyrite slag pretreatment: crush the pyrite slag raw material, screen out 60-80 mesh pyrite slag, dissolve it in dilute nitric acid solution with a mass concentration of 5%, and filter it after stirring at room temperature for 4 hours. Filter and wash the filtered (ie undissolved) pyrite slag until neutral, then dry it at 105°C for 12 hours;

[0027] 2) Pyrite slag modification: Weigh 100g of sucrose and dissolve it in 200mL of deionized water and stir at room temperature to dissolve it completely to obtain a sucrose solution; then add 100g of the pyrite slag obtained in step 1) to the sucrose solution And continue to stir for 15 minutes to obtain mixture A; transfer mixture A to a hydrothermal reactor, and treat it at 180 ° C for 4 hours to obtain mixture B; filter the filter cake obtained by filtering mixture B and wash it with ethanol for 4 times. After drying for 6 hours under the condition of ℃, roasting under the nitrogen atmosphere of 500 ℃ for 4 hours to obtai...

Embodiment 3

[0030] 1) Pyrite slag pretreatment: crush the pyrite slag raw material, screen out 60-80 mesh pyrite slag, dissolve it in dilute nitric acid solution with a mass concentration of 3%, and filter it after stirring at room temperature for 6 hours. Filter and wash the filtered (ie undissolved) pyrite slag until neutral, then dry it at 105°C for 12 hours;

[0031] 2) Pyrite slag modification: Weigh 100g of sucrose and dissolve it in 200mL of deionized water and stir at room temperature to dissolve it completely to obtain a sucrose solution; then add 100g of the pyrite slag obtained in step 1) to the sucrose solution And continue stirring for 15 minutes to obtain mixture A; transfer mixture A to a hydrothermal reactor, and treat it at 200 ° C for 3 hours to obtain mixture B; filter the filter cake obtained by filtering mixture B and wash it with ethanol for 4 times, After drying for 6 hours under the condition of ℃, roasting under the nitrogen atmosphere of 500 ℃ for 4 hours to obta...

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Abstract

The invention belongs to the technical field of environmental protection of chemical industry, and discloses a preparation method for a denitrification catalyst of pyrite cinder. The denitrification catalyst is obtained through steps of pyrite cinder pretreatment, pyrite cinder modification and active component loading. The preparation method comprises the following steps: placing pretreated pyrite cinder into a cane sugar solution, then successively carrying out hydrothermal treatment, filtering, drying and calcining so as to obtain modified pyrite cinder coated with a carbon microsphere coating, and loading active components of vanadium pentoxide, yttrium nitrate and cerium sulfate into the modified pyrite cinder so as to finally obtain the denitrification catalyst based on the pyrite cinder. According to the invention, the pyrite cinder is used as a raw material and is transformed into the novel denitration catalyst by modification. The catalyst provided by the invention has high reaction activity in a range of 200 to 400 DEG C.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and environmental protection, and relates to a denitration catalyst, in particular to a preparation method of a denitration catalyst based on pyrite slag. Background technique [0002] With the rapid advancement of my country's urbanization process, rapid economic growth, and continuous improvement of people's living standards, domestic consumption of fossil energy such as coal continues to increase, and these fuels emit a large amount of nitrogen oxides (NOx) during combustion. x ) will pollute the air, thereby threatening and destroying human health and the ecological environment. Atmospheric NO present x On the one hand, it comes from the exhaust gas emitted by motor vehicles, and on the other hand, it comes from the flue gas produced by coal-fired boilers. NH 3 -SCR technology is to remove NO x Efficient and stable technology has been used for many years in the denitrification...

Claims

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Application Information

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IPC IPC(8): B01J27/053B01D53/86B01D53/56
CPCB01D53/8628B01J27/053B01J37/0207B01J37/084B01J37/10B01J37/30B01D2255/65B01D2255/2065B01D2255/20723B01D2255/2061B01J35/617B01J35/615
Inventor 李俊霞
Owner 安徽金森源环保工程有限公司
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