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Preparation method of environmentally-friendly non-toxic catalyst

A catalyst and environmental protection technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of secondary pollution, complex preparation process, and difficulty in denitrification efficiency reaching 90%, achieving high strength, forming Excellent performance

Inactive Publication Date: 2013-10-30
丁珂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent 200810056629.2 of Tsinghua University has developed a catalyst for flue gas denitrification. The active component of the catalyst is ferrous sulfate, and the carrier is attapulgite, kaolin, zeolite, etc., which solves the problem of secondary pollution, but the preparation process is complicated. The catalytic efficiency of the prepared catalyst is not high, and the denitrification efficiency is difficult to reach 90%, and it is easy to be poisoned by SO2 during the catalytic process, and the long-term use effect is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The mass parts are 80 parts of TiO 2 Add the powder into warm water at 65°C, keep the temperature constant, and stir thoroughly for 2.5 hours; then add 40 parts of FeSO 4 Dissolve in oxalic acid solution, then slowly add the formed solution into the titanium dioxide carrier slurry during stirring, then add 10 parts of phenolic resin and 8 parts of methyl cellulose, stir evenly to obtain a paste mixture; then practice in vacuum Mixing in the mud machine for 1 hour, then stale for 6 hours under the condition of keeping the humidity constant, and then continue to mix and stale, repeat for 5 times, and get the prepared mud; put the mud through a wet honeycomb The extruder of the steel mold is extruded into a honeycomb shape; the extruded honeycomb body is dried in a drying oven for 24 hours, and then calcined for 24 hours to obtain a finished honeycomb catalyst.

[0026] Denitrification test: air velocity is 5000 / hr, NO X The concentration is about 100ppmv, and when the f...

Embodiment 2

[0028] The mass parts are 95 parts of TiO 2 Add the powder into warm water at 65°C, keep the temperature constant, and stir thoroughly for 2.5 hours; then add 40 parts of FeSO 4 Dissolve in oxalic acid solution, then slowly add the formed solution into the titanium dioxide carrier slurry during stirring, then add 10 parts of furan resin and 8 parts of methyl cellulose, stir evenly to obtain a paste mixture; Mixing in the mud machine for 1 hour, then stale for 6 hours under the condition of keeping the humidity constant, and then continue to mix and stale, repeat for 5 times, and get the prepared mud; put the mud through a wet honeycomb The extruder of the steel mold is extruded into a honeycomb shape; the extruded honeycomb body is dried in a drying oven for 24 hours, and then calcined for 24 hours to obtain a finished honeycomb catalyst.

[0029] Denitrification test: air velocity is 5000 / hr, NO X The concentration is about 100ppmv, and when the flue gas temperature is 420°...

Embodiment 3

[0031] The mass parts are 80 parts of TiO 2 Add the powder into warm water at 65°C, keep the temperature constant, and stir thoroughly for 2.5 hours; then add 45 parts of FeSO 4 Dissolve in oxalic acid solution, then slowly add the formed solution into the titanium dioxide carrier slurry during the stirring process, then add 25 parts of phenolic resin and 8 parts of methyl cellulose, stir evenly to obtain a paste mixture; then practice in vacuum Mixing in the mud machine for 1 hour, then stale for 6 hours under the condition of keeping the humidity constant, and then continue to mix and stale, repeat for 5 times, and get the prepared mud; put the mud through a wet honeycomb The extruder of the steel mold is extruded into a honeycomb shape; the extruded honeycomb body is dried in a drying oven for 24 hours, and then calcined for 24 hours to obtain a finished honeycomb catalyst.

[0032] Denitrification test: air velocity is 5000 / hr, NO X The concentration is about 100ppmv, an...

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Abstract

The invention relates to a preparation method of a novel environmentally-friendly non-toxic catalyst. The catalyst contains 80-95% of carrier TiO2 and 40-47.5% of active ingredient ferrous sulfate, does not contain vanadium pentoxide and is extruded and formed into a honeycombed catalyst. The denitration efficiency of the catalyst reaches about 95%; and the catalyst can be used for a long time, prevents environmental pollution and greatly reduces the denitration cost.

Description

technical field [0001] The invention relates to an environment-friendly and non-toxic catalyst, in particular to a method for preparing an environment-friendly catalyst used for flue gas denitrification. Background technique [0002] NOx is the main component of the greenhouse effect and the formation of acid rain and photochemical smog. However, most coal-fired power plants in my country still adopt low-NOx combustion technology, so the NOx emission of coal-fired boilers has the characteristics of large total emission and high NOx emission level per unit of power generation. Therefore, it has seriously damaged the ecological environment, restricted the development of my country's environmental protection work, and affected and endangered human health. my country formulated the first "Pollutant Emission Standards for Thermal Power Plants" in 1991. In the latest emission standards promulgated by the country, there are strict regulations on NOx emissions from power stations. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J35/04B01D53/86B01D53/56
Inventor 丁珂
Owner 丁珂
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