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Absorption and Catalytic Decomposition for Ammonia Removal at Low Temperature

A catalytic material, zinc oxide technology, applied in the field of catalysis and environmental science, can solve the problems of limited application and low degradation efficiency

Inactive Publication Date: 2011-12-21
SHANGHAI NIUYI NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low efficiency of photocatalytic degradation of ammonia also limits its wide application.

Method used

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  • Absorption and Catalytic Decomposition for Ammonia Removal at Low Temperature
  • Absorption and Catalytic Decomposition for Ammonia Removal at Low Temperature
  • Absorption and Catalytic Decomposition for Ammonia Removal at Low Temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Copper-iron composite oxide powders are synthesized by soluble copper salts and potassium persulfate (K 2 S 2 o 8 ) mixed with copper sulfate in nitric acid solution, while adding ferric nitrate (Fe(NO 3 ) 2 ), so that the Fe / Cu molar ratio is 0 to 0.20, and the resulting black precipitate is vigorously stirred and refluxed at 100°C for 24h, filtered, washed, dried at 110°C for 12h, and then roasted at 500°C for 6h to obtain a copper-iron composite of iron Oxide powder, respectively marked as Fe-Cu-0, Fe-Cu-5, Fe-Cu-10 and Fe-Cu-20, where Fe-Cu means copper-iron composite oxide, and the number means Fe / Cu total The molar ratio percentage.

[0023] XRD analysis and HRTEM analysis show that the material is copper-iron composite oxide.

[0024] The performance tests of the catalytic materials were carried out in a continuous flow fixed bed reactor. The powdered catalytic material is tableted and crushed to form a 0.25-0.50mm particle sample, and then 0.5g of the part...

Embodiment 2

[0026] The synthesis of copper-iron composite oxide powder is with embodiment one, namely by copper salt and potassium persulfate (K 2 S 2 o 8 ) mixed with copper sulfate in nitric acid solution, while adding ferric nitrate (Fe(NO 3 ) 2 ), so that the Fe / Mn molar ratio is 0 to 0.20, the resulting black precipitate is vigorously stirred and refluxed at 100°C for 24h, filtered, washed, dried at 110°C for 12h, and then roasted at 200-800°C for 6h to obtain iron-copper- Iron composite oxide powder, respectively recorded as Fe-Cu-0, Fe-Cu-5, Fe-Cu-10 and Fe-Cu-20, where Fe-Cu represents iron-copper-iron composite oxide, and the number represents Fe / Cu total The molar ratio percentage.

[0027] XRD analysis and HRTEM analysis show that the material is copper-iron composite oxide.

[0028] The performance tests of the catalytic materials were carried out in a continuous flow fixed bed reactor. The powdered catalytic material is tableted and crushed to form a 0.25-0.50mm parti...

Embodiment 3

[0030] 1) Synthesis of copper-iron composite oxide powder

[0031] The synthesis of copper-iron composite oxide powder is the same as example one, that is, the synthesis of iron-copper-iron composite oxide powder is through copper salt and potassium persulfate (K 2 S 2 o 8 ) mixed with copper sulfate in nitric acid solution, while adding ferric nitrate (Fe(NO 3 ) 2 ), so that the Fe / Cu molar ratio is 0 to 0.20, and the resulting black precipitate is vigorously stirred and refluxed at 100°C for 24h, filtered, washed, dried at 110°C for 12h, and then roasted at 500°C for 6h to obtain a copper-iron composite of iron oxide powder.

[0032] 2) Preparation of catalytic materials supported by copper-iron composite oxide honeycomb ceramics.

[0033] Weigh a certain amount of copper-iron composite oxide, add a certain proportion of deionized water and the inorganic binder in claim 9, and stir at a high speed for 1-24 hours to obtain a copper-iron composite oxide slurry with a cert...

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Abstract

The invention relates to an iron-copper composite oxide catalyst for catalytically removing ammonia at a low temperature and a preparation method thereof, and relates to the fields of catalysis and environmental protection. It is characterized in that zinc oxide is used as carrier and iron-copper composite oxide is used as active component. The characteristics of the monolithic catalyst of the present invention are that it does not require additional energy input such as light, heat and electricity, and can stably reduce ammonia to nitrogen under the conditions of normal temperature, humidity and large air volume.

Description

technical field [0001] The invention relates to a low-temperature absorption and catalytic decomposition to remove ammonia and a preparation method thereof, which relate to the fields of catalysis and environmental science. It is characterized in that nanometer zinc oxide is used as a carrier, and copper-iron composite oxide is used as an active component. The characteristic of the catalyst of the present invention is that it does not require the input of additional light, heat, electricity and other energy sources, and can absorb and decompose ammonia into nitrogen under the conditions of low temperature, normal humidity and large air volume. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the above-mentioned catalyst to remove ammonia at low temperature. Background technique [0004] Ammonia is a colorless gas with a strong pungent odor. Ammonia is an alk...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J37/03B01D53/86B01D53/58
CPCY02A50/20
Inventor 不公告发明人
Owner SHANGHAI NIUYI NEW ENERGY TECH
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