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Preparation method of manganese series low-temperature SCR denitration catalyst

A denitration catalyst, low temperature technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc. Water and sulfur resistance, good low temperature activity

Inactive Publication Date: 2016-08-03
北京科林佰德环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the nitrogen oxides emitted by my country's industrial kilns (glass kilns, cement kilns, etc.) are the second emission source after thermal power plants in the total domestic nitrogen oxide emissions. The flue gas temperature is relatively low, mostly between 120-250°C, and there is no flue gas denitrification catalyst suitable for industrial kilns at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of manganese series low-temperature SCR denitration catalyst comprises the following process steps:

[0023] (1) Preparation of manganese salt solution: Dissolve 41.15g of manganese nitrate in 100g of water;

[0024] (2) Preparation of metal salt solution: weigh 50.5 g of ferric nitrate, stir and dissolve the weighed ferric nitrate in the solution obtained in (1) at room temperature,

[0025] Stir well, ultrasonic 1h;

[0026] (3) Preparation of ammonium salt solution: Weigh 51.4g of ammonium carbonate and dissolve in 100g of deionized water;

[0027] (4) Weigh 80g of titanium dioxide, add the solution obtained in step (1) to it, stir evenly at room temperature, then add the ammonium salt solution obtained in step (3), adjust the pH value to alkaline, and stir evenly at room temperature , ultrasound 1h;

[0028] (5) The solid obtained in step (4) was washed and filtered with 600 g of deionized water at room temperature;

[0029] (6) Drying: Dr...

Embodiment 2

[0034] A preparation method of a low-temperature SCR denitration catalyst, comprising the following process steps:

[0035] (1) Preparation of manganese salt solution: Dissolve 99.39g of manganese nitrate in 150g of water;

[0036] (2) Preparation of metal salt solution: Weigh 21.56 g of cobalt nitrate, stir and dissolve the weighed cobalt nitrate in the solution obtained in (1) at room temperature, stir evenly, and ultrasonicate for 2 hours;

[0037] (3) Preparation of ammonium salt solution: Weigh 80.52g of ammonium carbonate and dissolve in 120g of deionized water;

[0038] (4) Weigh 70.05g of titanium dioxide, add the solution obtained in step (1) to it, stir evenly at room temperature, then add the ammonium salt solution obtained in step (3), adjust the pH value to alkaline, and stir at room temperature Uniform, ultrasonic 2h;

[0039] (5) The solid obtained in step (4) was washed and filtered with 800 g of deionized water at room temperature;

[0040] (6) Drying: Dry ...

Embodiment 3

[0045] A preparation method of a low-temperature SCR denitration catalyst, comprising the following process steps:

[0046] (1) Preparation of manganese salt solution: Dissolve 104.99g of manganese acetate in 120g of water;

[0047] (2) Preparation of metal salt solution: Weigh 10.81 g of cerium nitrate, stir and dissolve the weighed cerium nitrate in the solution obtained in (1) at room temperature, stir evenly, and sonicate for 2 hours;

[0048] (3) Preparation of ammonium salt solution: Weigh 82.75g of ammonium carbonate and dissolve in 150g of deionized water;

[0049] (4) Weigh 70.11g of titanium dioxide, add the solution obtained in step (1) to it, stir evenly at room temperature, then add the ammonium salt solution obtained in step (3), adjust the pH value to alkaline, and stir at room temperature Uniform, ultrasonic 2h;

[0050] (5) The solid obtained in step (4) was washed and filtered with 1000 g of deionized water at room temperature;

[0051] (6) Drying: Dry the...

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Abstract

The invention discloses a preparation method of a manganese-based low-temperature SCR denitrification catalyst, which comprises: first preparing a manganese salt solution, adding transition metal salts or rare earth metal salts to the prepared manganese salt solution to obtain a metal salt mixed solution, and ultrasonically treating Mix the solution evenly, prepare the ammonium salt solution, add the metal salt mixed solution to a certain weight of titanium dioxide, stir evenly to obtain a solid, slowly add the pre-prepared ammonium salt solution to the obtained solid, stir evenly, and wash , dried, and calcined to obtain a manganese-based low-temperature SCR denitration catalyst. Beneficial effects of the present invention: the obtained catalyst has good low-temperature activity, and can maintain a good nitrogen oxide removal rate and water and sulfur resistance at 120-250 ° C. This catalyst can be applied to thermal power plant dust collectors and after desulfurization As well as low-temperature fields such as industrial kilns where the flue gas temperature is between 120-250 ° C, a breakthrough in denitrification catalyst technology and application has been achieved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a preparation method of a manganese-based low-temperature selective catalytic reduction (SCR) denitration catalyst. Background technique [0002] Nitrogen oxides (NOx) are an air pollutant, one of the main causes of photoacid rain, chemical smog and ozone layer destruction, and have great harm to industrial and agricultural production, human health and ecological environment. Ammonia Selective Catalytic Reduction (SCR) is one of the effective ways to reduce NOx emissions. Its denitrification principle uses ammonia as a reducing agent to selectively reduce nitrogen monoxide and nitrogen dioxide into pollution-free nitrogen and water. [0003] At present, vanadium tungsten (molybdenum) titanium catalyst is the most widely used commercially and has the highest denitrification efficiency, but its activity temperature is relatively high, and the required range is about 300-450°C. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/34B01D53/86B01D53/56
CPCB01J23/8892B01D53/8628B01D2257/40B01J23/34B01J2523/00
Inventor 唐保卫邢岗付勇王兴国常永生
Owner 北京科林佰德环保有限公司
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