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
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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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