Method for regenerating laughing gas low-temperature decomposition catalyst

[0031] A preparation method for a catalyst for low-temperature decomposition of laughing gas, comprising the steps of:

[0032] a) Zinc nitrate, tin nitrate, and ammonium tungstate were mixed at a molar ratio of 0.2:0.45:0.35 and dissolved in methanol to prepare a mixed solution with a mass fraction of 5%, and the mixed solution was stirred at room temperature for 4 hours.

[0033] b) Immerse the fumed silica in the prepared sulfuric acid solution with a mass fraction of 5%, ultrasonically treat it for 6 minutes, wash with pure water until the pH is 6-7, and dry it in an oven at 90°C for later use.

[0034] c) Mix the mixed solution prepared in step a) with the carrier treated in step b) according to the mass ratio of 1:1, let it stand for 4 hours, dry it in an oven at 90°C, and then bake it in a muffle furnace at 300°C for 5 hours .

[0035] A kind of in-situ regeneration method of the laughing gas low-temperature decomposition catalyst prepared by the above method, comprisi...

[0040] A preparation method for a catalyst for low-temperature decomposition of laughing gas, comprising the steps of:

[0041] a) Ferric nitrate, cadmium nitrate, and chromium nitrate were mixed at a molar ratio of 0.4:0.45:0.15 and dissolved in ethanol to prepare a mixed solution with a mass fraction of 10%, and the mixed solution was stirred at room temperature for 10 h.

[0042] b) Immerse the ZSM-5 molecular sieve in the prepared hydrochloric acid solution with a mass fraction of 10%, ultrasonically treat it for 12 minutes, wash it with pure water until the pH is 6-7, and dry it in an oven at 110°C for later use.

[0043] c) Mix the mixed solution prepared in step a) with the carrier treated in step b) according to the mass ratio of 1:1, let it stand for 10 hours, dry it in an oven at 100°C, and then bake it in a muffle furnace at 800°C for 12 hours .

[0044] A kind of in-situ regeneration method of the laughing gas low-temperature decomposition catalyst prepared by the...

[0049] A preparation method for a catalyst for low-temperature decomposition of laughing gas, comprising the steps of:

[0050] a) molybdenum nitrate, manganese nitrate, cerium nitrate, ferric nitrate are mixed in molar ratio 0.4:0.35:0.1:0.15 and dissolved in isopropanol to prepare a mixed solution with a mass fraction of 8%, and mix the mixed solution at room temperature Stir and place for 6h.

[0051] b) Immerse the TS-1 molecular sieve in the prepared hydrochloric acid solution with a mass fraction of 8%, ultrasonically treat it for 10 minutes, wash it with pure water until the pH is 6-7, and dry it in an oven at 110°C for later use.

[0052] c) Mix the mixed solution prepared in step a) with the carrier treated in step b) at a mass ratio of 1:1, let it stand for 8 hours, dry it in an oven at 105°C, and then bake it in a muffle furnace at 600°C for 10 hours.

[0053] A method for in-situ regeneration of the nitrous oxide air deep oxidation catalyst prepared by the above m...