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Preparation method of honeycomb-shaped Mn-based low-temperature denitration catalyst

A denitrification catalyst and low-temperature denitrification technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as lack of pore expansion effect, dispersion of carrier pore distribution, and poor mechanical strength. Sulfur resistance and thermal stability, low firing shrinkage, and life-extending effects

Active Publication Date: 2018-05-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the amount of carbon black powder used for hole expansion is too large, the pore distribution of the final carrier will be dispersed, not concentrated, and the mechanical strength will be poor.
If the dosage is too small and the ideal reaming effect cannot be achieved

Method used

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  • Preparation method of honeycomb-shaped Mn-based low-temperature denitration catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add the carbon black powder to the ethanol solution containing tetraethyl orthosilicate (where the solid-liquid mass ratio is 1:8, and the tetraethyl orthosilicate is SiO 2 The mass ratio of meter to carbon black powder is 2:1), under the condition of ultrasonic dispersion (the energy density of ultrasonic dispersion is 0.6kW / L, the temperature of ultrasonic dispersion is 40°C, and the time of ultrasonic dispersion is 1 hour), mix well, filter, The solid phase was dried at 50° C. for 2 hours, and then dried to obtain silicon source-modified carbon black powder;

[0030] (2) Add 54g of carbon black powder obtained in step (1) (based on the weight of carbon black powder), 600g of titanium sulfate, and 6g of nitric acid, then treat at 400°C in nitrogen for 3 hours, and roast at 500°C in air atmosphere for 5 hours. Obtain silicon-containing titania carrier;

[0031] (3) In the mixer, add 9 kg silicon-containing titanium oxide and 1kg A molecular sieve carrier, mix 0.4k...

Embodiment 2

[0034] (1) Add carbon black powder to ethanol solution containing tetraethyl orthosilicate (wherein the solid-liquid mass ratio is 1:12, and tetraethyl orthosilicate is SiO 2 The mass ratio of meter to carbon black powder is 3:1), under the condition of ultrasonic dispersion (the energy density of ultrasonic dispersion is 0.8kW / L, the temperature of ultrasonic dispersion is 60°C, and the time of ultrasonic dispersion is 1 hour), mix well, filter, The solid phase was dried at 60° C. for 2 hours, and then dried to obtain silicon source-modified carbon black powder;

[0035] (2) Add 120g of carbon black powder obtained in step (1) (based on the weight of carbon black powder), 900g of titanium sulfate, and 6g of nitric acid, then treat at 500°C in nitrogen for 3 hours, and roast at 500°C in air atmosphere for 5 hours. Obtain silicon-containing titania carrier;

[0036] (3) In the mixer, add 9.5 kg silicon-containing titanium oxide and 0.5 kg ZSM-5 molecular sieve carrier, 0.6 kg ...

Embodiment 3

[0039] (1) Add the carbon black powder to the ethanol solution containing tetraethyl orthosilicate (the solid-to-liquid mass ratio is 1:20, and the tetraethyl orthosilicate is SiO 2 The mass ratio of meter to carbon black powder is 4:1), under the condition of ultrasonic dispersion (the energy density of ultrasonic dispersion is 0.6kW / L, the temperature of ultrasonic dispersion is 40°C, and the time of ultrasonic dispersion is 1 hour), mix well, filter, The solid phase was dried at 50° C. for 2 hours, and then dried to obtain silicon source-modified carbon black powder;

[0040] (2) Add 150g of carbon black powder obtained in step (1) (by weight of carbon black powder), 800g of titanium sulfate, and 8g of nitric acid, then treat at 400°C in nitrogen for 3 hours, and roast at 500°C in air atmosphere for 5 hours. Obtain silicon-containing titania carrier;

[0041] (3) In the mixer, add 8.5 kg silicon-containing titanium oxide and 1.5 kg Y molecular sieve carrier, mix 0.2 kg 50%...

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Abstract

The invention discloses a preparation method of a honeycomb-shaped Mn-based low-temperature denitration catalyst. The preparation method comprises steps as follows: (1), titanium dioxide, a molecularsieve and a solution containing manganese nitrate, cerium nitrate and iron nitrate are mixed uniformly, a mixture is dried, roasted at low temperature and smashed, and a powdery material is obtained;(2), the powdery material obtained in the step (1) is subjected to a forming process of the denitration catalyst, and the honeycomb-shaped Mn-based low-temperature denitration catalyst is obtained. The catalyst prepared with the method has larger pore volume and higher strength and is good in forming performance and not prone to cracking, the active components are manganese oxides in different valence states, and the catalyst is excellent in denitration performance and has good capability of resisting water vapor and SO2 poisoning.

Description

technical field [0001] The invention belongs to the technical field of environmental protection catalysts, and mainly relates to a preparation method of a honeycomb Mn-based low-temperature denitration catalytic material. Background technique [0002] At present, air pollution has become a very serious social problem. Among them, nitrogen oxide pollution will cause acid rain and other extreme weather, which has become an important part of air pollution. At present, the mainstream method for controlling nitrogen oxides is selective catalytic reduction (SCR), and SCR The investment in catalytic materials accounts for about 40% of the total investment, so the research and development of denitrification catalytic materials is very important. [0003] At present, the denitrification catalytic materials on the market are mainly vanadium-tungsten-titanium system, and the catalytic materials of vanadium-tungsten-titanium system are more suitable for the flue gas conditions of power ...

Claims

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Application Information

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IPC IPC(8): B01J29/48B01J29/16B01J29/78B01J35/04B01D53/86B01D53/56
CPCB01D53/8628B01J29/166B01J29/48B01J29/7807B01D2258/0283B01J35/56
Inventor 王宽岭王学海刘忠生陈高升程明珠刘淑鹤
Owner CHINA PETROLEUM & CHEM CORP
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