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Preparation method of flue gas desulfurization catalyst

A desulfurization catalyst and flue gas technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of slow reaction speed and low desulfurization efficiency, and achieve low cost, simple desulfurization method, High desulfurization effect

Inactive Publication Date: 2016-05-04
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention: for desulfurization by wet method and semi-dry method, the desulfurization efficiency is low, the reaction speed is slow, and a large amount of cost needs to be consumed. A method for preparing a catalyst using carbonized charcoal is provided. The present invention will The prepared desulfurization catalyst is used for desulfurization, the desulfurization effect is high, and the desulfurization efficiency reaches more than 99%. At the same time, the desulfurization method is simple and does not need to consume a lot of cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First pick fresh 2kg poplar branches, 3kg peach branches, and 2kg locust tree branches, peel them, expose them to the sun for 3 days, make their water content reach 15%, and place them in a charcoal rod making machine Make it into a carbon rod, control the pressure at 0.6MP, and the temperature at 40°C; put the charcoal prepared above in a charcoal kiln, heat it up to 200°C, react for 45min, and keep it warm for 2h, then continue to heat up to After reacting for 2 hours at 400°C, let it cool down to room temperature naturally, and then take out the carbonized charcoal; then soak the above carbonized charcoal in absolute ethanol solution for 40 minutes, take it out, and put it in a pulverizer for crushing into After 120 mesh particles, mix with bauxite and fly ash in a mass ratio of 3:1:1, and dry it at low temperature to make its water content to 2%, to obtain a dry mixture; then the dry mixture prepared above Soak it in a hydrochloric acid solution with a mass fraction...

example 2

[0018] First pick fresh 1kg poplar branches, 2kg peach branches, and 1kg locust tree branches, peel them, expose them to the sun for 2 days, make their water content reach 10%, and place them in a charcoal rod making machine Make it into a charcoal rod, control the pressure at 0.5MP, and the temperature at 30°C; place the charcoal prepared above in a charcoal kiln, heat it up to 100°C, react for 40min, and keep it warm for 1h, then continue to heat up to After reacting at 300°C for 1 hour, let it cool down to room temperature naturally, then take out the carbonized charcoal; then soak the above carbonized charcoal in absolute ethanol solution for 30 minutes, take it out, and put it in a pulverizer to grind it into After 100 mesh particles, mix with bauxite and fly ash in a mass ratio of 3:1:1, and dry it at low temperature to make its water content to 1%, to obtain a dry mixture; then the dry mixture prepared above Soak it in a hydrochloric acid solution with a mass fraction o...

example 3

[0020] First pick fresh 1kg poplar branches, 3kg peach branches, and 2kg locust tree branches, peel them, expose them to the sun for 2 days, make their water content reach 12%, and place them in a charcoal rod making machine Make it into a carbon rod, control the pressure at 0.55MP, and the temperature at 35°C; place the charcoal prepared above in a charcoal kiln, heat it up to 150°C, react for 42min, and keep it warm for 1h, then continue to heat up to After reacting at 350°C for 1 hour, let it cool down to room temperature naturally, then take out the carbonized charcoal; then soak the above carbonized charcoal in absolute ethanol solution for 35 minutes, take it out, and put it in a pulverizer for crushing into After 110 mesh particles, mix with bauxite and fly ash in a mass ratio of 3:1:1, and dry it at low temperature to make its water content to 1%, to obtain a dry mixture; then the dry mixture prepared above Soak it in a hydrochloric acid solution with a mass fraction o...

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PUM

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Abstract

The invention relates to a preparation method of a flue gas desulfurization catalyst, and belongs to the technical field of waste gas treatment. The preparation method comprises the steps: firstly, insolating tree branches to form a charcoal rod, placing the charcoal rod in a charcoal kiln, heating the charcoal rod to make the temperature rise, cooling, taking out carbonized charcoal, placing the carbonized charcoal in an absolute ethyl alcohol solution, soaking, crushing, mixing with bauxite and fly ash, drying at low temperature, and thus obtaining a dried mixture; placing the dried mixture in a hydrochloric acid solution, soaking, filtering, placing the filtered material in a reaction kettle, heating to make the temperature rise, adding iron oxide, continuing to heat to make the temperature rise, introducing nitrogen, taking out the product, naturally cooling to room temperature, adding a ferric nitrate solution and an aluminum nitrate solution into the product, stirring and mixing, filtering, and drying to obtain the catalyst. The method has the beneficial effects that the prepared desulfurization catalyst is used for desulfurization, the desulfurization efficiency is high, the desulfurization efficiency reaches more than or equal to 99%, besides, the desulfurization method is simple, and a large amount of cost is not required to be consumed.

Description

technical field [0001] The invention relates to a method for preparing a flue gas desulfurization catalyst, belonging to the technical field of waste gas treatment. Background technique [0002] Flue gas desulfurization can be divided into three types: wet method, semi-dry method and dry method according to the form of the reaction product. The wet desulfurization technology that has been used, such as the limestone-gypsum method, has the problems of high investment cost, high operating cost and secondary water pollution. The dry flue gas desulfurization process has the advantages of less equipment corrosion, high flue gas temperature after purification, which is conducive to the diffusion of chimney exhaust, and can also remove nitrogen oxides contained in flue gas at the same time, but the desulfurization efficiency is low and the reaction speed is slow. Construction investment is large. Contents of the invention [0003] The technical problem mainly solved by the pres...

Claims

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Application Information

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IPC IPC(8): B01J23/745
CPCB01J23/745B01J21/18
Inventor 黄勇薛红娟
Owner CHANGZHOU UNIV