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Preparation method for improving low-temperature activity of carbon-based SCR catalyst

A catalyst and activity technology, which is applied in the preparation field of improving the activity of low-temperature SCR catalysts, can solve the problems of water resistance and sulfur resistance performance to be improved, and achieve the effects of easy control of preparation conditions, high energy utilization rate, and cheap and easy-to-obtain raw materials

Pending Publication Date: 2019-03-29
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many studies on low-temperature denitrification catalysts, such as Mn-based and Ce-based catalysts, etc. These catalysts have good activity, but their water and sulfur resistance performance needs to be improved.

Method used

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  • Preparation method for improving low-temperature activity of carbon-based SCR catalyst
  • Preparation method for improving low-temperature activity of carbon-based SCR catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Accurately weigh 1.66g C 2 h 2 o 4 Add it into a 100ml beaker, add 30ml of deionized water therein, and stir it on a magnetic stirrer to make it dissolve completely. Weigh 0.7718g NH 4 VO 3 Add it to the above solution, stir well to make it dissolve completely. Continue to stir until the color of the solution turns blue, and add 19.4 g of treated activated carbon to the above blue solution. Place the above beaker in the cavity of a microwave oven, adjust the microwave power to 100W, stir in a water bath at 60°C for 1h, dry in an oven at 120°C for 6h, and finally bake in a nitrogen atmosphere at 500°C for 3h, and in an air atmosphere at 250°C for 3h , to get V 2 o 5 / AC catalyst, denoted as 1#.

Embodiment 2

[0030] Accurately weigh 1.66g C 2 h 2 o 4 Add it into a 100ml beaker, add 30ml of deionized water therein, and stir it on a magnetic stirrer to make it dissolve completely. Weigh 0.7718g NH 4 VO 3Add it to the above solution, stir well to make it dissolve completely. Continue to stir until the color of the solution turns blue, and add 19.4 g of treated activated carbon to the above blue solution. Place the above beaker in the cavity of a microwave oven, adjust the microwave power to 200W, stir in a water bath at 60°C for 1h, dry in an oven at 120°C for 6h, and finally bake at 500°C for 3h in a nitrogen atmosphere, and bake at 250°C for 3h in an air atmosphere , to get V 2 o 5 / AC catalyst, denoted as 2#.

Embodiment 3

[0032] Accurately weigh 1.66g C 2 h 2 o 4 Add it into a 100ml beaker, add 30ml of deionized water therein, and stir it on a magnetic stirrer to make it dissolve completely. Weigh 0.7718g NH 4 VO 3 Add it to the above solution, stir well to make it dissolve completely. Continue to stir until the color of the solution turns blue, and add 19.4 g of treated activated carbon to the above blue solution. Place the above beaker in the cavity of a microwave oven, adjust the microwave power to 300W, stir in a 60°C water bath for 1h, dry in an oven at 120°C for 6h, and finally bake in a nitrogen atmosphere at 500°C for 3h, and in an air atmosphere at 250°C for 3h , to get V 2 o 5 / AC catalyst, denoted as 3#.

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Abstract

The invention relates to a preparation method for improving low temperature activity of carbon-based SCR catalyst, which belongs to the technical field of denitration catalyst preparation. According to the invention, V2O5 is used as an active component, activated carbon is used as a carrier, the activated carbon is weighed and subjected to oxidation treatment with nitric acid, and the material issubjected to filtration, washing and drying; the oxalic acid is weighed and dissolved in deionized water, after the solution is dissolved, a vanadium precursor is added, after the solution turns blue,the nitric acid-treated activated carbon is added; an obtained mixture is stirred and impregnated at different powers in a microwave oven chamber, and then is subjected to calcination under differentatmospheres to obtain a V2O5 / AC catalyst. The invention has simple process, strong operability, mild reaction conditions and short required time. The active component on the catalyst carrier is regulated by microwave processing power and immersion time. The V2O5 species on the V2O5 / AC catalyst after microwave treatment is more evenly dispersed, particle aggregation is reduced, more active sites can be provided, and the denitration performance of the catalyst s increased.

Description

technical field [0001] The invention relates to a preparation method for improving the activity of a low-temperature SCR catalyst, which belongs to the field of catalyst preparation. Background technique [0002] With the rapid development of social economy, high-intensity energy consumption is followed by serious air pollution, in which nitrogen oxides (NO x ) is one of the main air pollutants, and it can also cause a series of environmental problems such as acid rain, photochemical smog, and ozone layer destruction. Selective catalytic reduction (SCR) is currently the most widely used and most efficient way to remove NO. x technology, in which the catalyst is the core of the denitrification technology. Now the denitrification catalyst is generally placed after the dust removal equipment and desulfurization device, and the temperature of the flue gas passing through the denitrification catalyst is relatively low. In order to avoid device modification and reheating, it is ...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J35/10B01D53/56B01D53/86B01J37/02B01J37/34
CPCB01D53/8628B01J23/22B01J37/0201B01J37/346B01D2251/2062B01D2258/0283B01J35/61
Inventor 何洪程杰宋丽云邱文革孙炎明李世宁
Owner BEIJING UNIV OF TECH
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