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A kind of preparation method of low-temperature anti-sulfur denitrification catalyst

A technology of denitrification catalyst and catalyst carrier, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve problems such as deactivation and catalyst denitrification activity reduction

Inactive Publication Date: 2021-04-09
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on SO 2 In the presence of

Method used

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  • A kind of preparation method of low-temperature anti-sulfur denitrification catalyst
  • A kind of preparation method of low-temperature anti-sulfur denitrification catalyst

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Embodiment 1

[0015] Example 1 0.05Fe-doped TiO 2 Supported iron-manganese composite oxide denitration catalyst

[0016] 20ml of butyl titanate and 70ml of absolute ethanol are mixed to prepare liquid A; 1.19g of ferric nitrate (Fe(NO 3 ) 3 9H 2 O) The solutions are mixed to prepare liquid B. Slowly drop liquid A into liquid B, heat it in a water bath at 60°C, stir and reflux, remove the reflux device after adding all liquid A, continue stirring to evaporate water, and make iron-titanium composite organic gel. Put the iron-titanium composite organogel at room temperature for 16 hours, then put it in a drying oven, and dry it at 120°C for 12 hours to obtain a dry glue, and put the dry glue in H 2 The catalyst carrier was obtained by keeping the temperature at 500° C. for 4 hours in an atmosphere sintering furnace. use N 2 The BET specific surface area of ​​the carrier measured by the adsorption-desorption method is 105.27m 2 / g.

[0017] Weigh 5g carrier, 3.62g Fe(NO 3 ) 3 9H 2 O ...

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Abstract

The invention belongs to the technical field of chemical industry, and is a preparation method of a low-temperature anti-sulfur denitrification catalyst. 2 The denitrification problem of flue gas, the catalyst of the present invention is doped iron modified TiO 2 Supported iron-manganese composite oxide catalyst, doped with iron and TiO 2 The molar ratio is 0.01:1~0.5:1, mixed by sol-gel method, and roasted in a reducing atmosphere to obtain a carrier, and the impregnation method is used to load 10% (mass ratio to the carrier, the same below) of Fe and 10 % Mn, the prepared denitration catalyst has a large specific surface area, high thermal stability, high denitration efficiency and good sulfur resistance, and is suitable for the catalyst containing a certain amount of SO 2 The field of nitrogen oxide removal in flue gas. The evaluation of simulated flue gas in the laboratory shows that when the air velocity is 30,000h ‑1 , NO 1000ppm and SO 2 Under the condition of 100ppm, in the range of 160~250℃, the removal rate of NO can reach more than 75%, and there is no SO 2 When it exists, the removal rate of NO at 160-250°C can reach more than 92%.

Description

Technical field: [0001] The invention belongs to the technical field of chemical industry, and relates to a preparation method of a low-temperature sulfur-resistant denitrification catalyst, in particular to a preparation method of a sulfur-resistant denitrification catalyst with a high specific surface area and an adjustable active component valence state. [0002] technical background: [0003] Nitrogen oxide (NOx) is an important pollutant, and its emission into the atmosphere will cause a series of environmental problems such as acid rain, photochemical smog, ozone layer thinning and global warming. Therefore, the governments of various countries have proposed strict limit values ​​for NOx in exhaust emissions. In the pollutant emission standards of various industries promulgated by my country after 2011, the emission limit value of NOx has dropped to 500mg / m 3 , even reduced to 200mg / m in special areas 3 . Therefore, NOx removal has become the primary problem of pollu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J37/02B01J37/08B01D53/86B01D53/56
CPCB01D53/8628B01J23/8892B01J37/0201B01J37/08
Inventor 陈红萍梁英华齐雪杨旭郭红霞
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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