A kind of preparation method of high-efficiency denitration catalyst

A technology of denitrification catalyst and sodium hydroxide, which is applied in the field of preparation of denitrification catalyst and denitrification catalyst, can solve the problems of high production cost and hinder application, and achieve the effect of increasing added value, easy enlargement and reducing production cost

Active Publication Date: 2020-04-21
安徽纳蓝环保科技有限公司
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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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  • A kind of preparation method of high-efficiency denitration catalyst

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Effect test

Embodiment 1

[0022] 1) Copper slag pretreatment: crush the copper slag, screen out 80-100 mesh copper slag, put it in a sodium hydroxide solution with a mass concentration of 15%, then stir it at room temperature for 8 hours and then filter it. After the copper slag is filtered and washed to neutral, it is dried at 105°C for 12 hours; the dried copper slag is placed in a heating device, and 25% O 2 +75%N 2 In a circulating atmosphere, the temperature was raised from room temperature to 500 °C at a rate of 1 °C / min, and it was naturally lowered to room temperature after 5 hours of heat preservation; the mass-volume ratio of copper slag and sodium hydroxide solution was 0.2 g / mL,

[0023] 2) Copper slag modification: Weigh 100g of sucrose and dissolve it in 200mL of deionized water and stir it at room temperature to completely dissolve to obtain a sucrose solution; then add 100g of the copper slag obtained in step 1) to the sucrose solution and continue stirring 8min to obtain mixture A; tr...

Embodiment 2

[0027] 1) Copper slag pretreatment: crush the copper slag, screen out 80-100 mesh copper slag, place it in a sodium hydroxide solution with a mass concentration of 25%, then stir it at room temperature for 4 hours and then filter it. After the copper slag is filtered and washed to neutral, it is dried at 105°C for 12 hours; the dried copper slag is placed in a heating device, and 25% O 2 +75%N 2 In a circulating atmosphere, the temperature was raised from room temperature to 500 °C at a rate of 1 °C / min, and it was naturally lowered to room temperature after 5 hours of heat preservation; wherein, the mass-volume ratio of copper slag and sodium hydroxide solution was 0.4 g / mL;

[0028] 2) Modification of copper slag: Weigh 100g of sucrose and dissolve it in 200mL of deionized water and stir at room temperature for 20min to completely dissolve to obtain a sucrose solution; then add 100g of copper slag obtained in step 1) to the sucrose solution and continue stirring After 10 mi...

Embodiment 3

[0032] 1) Copper slag pretreatment: crush the copper slag, screen out 80-100 mesh copper slag and place it in a sodium hydroxide solution with a mass concentration of 20%, wherein the mass-volume ratio of copper slag and sodium hydroxide solution is 0.3 g / mL, stirred at room temperature for 6 hours, then filtered, filtered and washed the filtered copper slag until neutral, and dried at 105°C for 12 hours; then put the dried copper slag in a heating device, 25% O 2 +75%N 2 In a circulating atmosphere, the temperature was raised from room temperature to 500 °C at a rate of 1 °C / min, and it was naturally lowered to room temperature after 5 hours of heat preservation;

[0033] 2) Copper slag modification: Weigh 100% of sucrose, dissolve it in 200mL deionized water and stir at room temperature for 15 minutes to completely dissolve to obtain a sucrose solution, then add the copper slag obtained in step 1) to the sucrose solution, and continue stirring Treat for 12 minutes to obtai...

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Abstract

The invention discloses a preparation method of an efficient denitration catalyst and particularly relates to a preparation method of a copper slag-based denitration catalyst. The preparation method comprises the following steps: carrying out hydrothermal treatment on copper slag processed through the steps of dissolving, filtration, drying and the like and a saccharose solution, so as to obtain modified copper slag coated with a carbon microsphere coating layer; and loading the modified copper slag with active components such as a WO3 precursor, ammonium vanadate and heteropolyacid, and carrying out evaporation, drying and high-temperature heating. According to the preparation method, the copper slag is utilized as the raw material and is modified to be converted into a novel denitration catalyst, and the catalyst has high catalytic activity in a range of 200-400 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 method for preparing a denitration catalyst based on copper slag. Background technique [0002] With the global consumption of fossil energy such as coal, a large amount of nitrogen oxides (NOx) will be emitted during the combustion of these fuels. x ) pollutes the air, which in turn threatens and destroys 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. Currently, NH 3 -SCR denitrification technology is the most widely used and most mature flue gas purification technology in industry, and the core of this technology is catalyst, and its industrialized catalyst system is based on MO 3 -V 2 o 5 / TiO 2 or WO 3 -V 2 o ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01D53/86B01D53/56
CPCB01D53/8628B01J23/002B01J23/888B01J23/8885B01J2523/00B01J2523/17B01J2523/69B01J2523/68B01J2523/55
Inventor 李俊霞
Owner 安徽纳蓝环保科技有限公司
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