MnO2-Co2O3-CeO2-SnO2 deamination catalyst, and preparation method and application thereof
A catalyst and co-catalyst technology, used in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of large power consumption, low efficiency and slow catalytic oxidation of ammonia nitrogen, requiring more than ten days or even a month, etc. , to achieve high-efficiency green oxidation, improve activity and transfer capacity, and improve the effect of catalytic oxidation capacity
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Embodiment 1
[0084] The MnO of this embodiment 2 -Co 2 o 3 -CeO 2 -SnO 2 The preparation method of deammonization catalyst comprises the following steps:
[0085] (1) Clinoptilolite pretreatment: take 1kg of natural clinoptilolite, particle diameter is 1-3mm, clean the dust on the surface of clinoptilolite with tap water, after rinsing 3 times, clinoptilolite is placed in the oven, Dry at 110°C for 4 hours, then take it out for use;
[0086] (2) Preparation of oxidation solution: use deionized water as solvent, prepare KMnO containing 0.05mol / L 4 and 15L of a mixed solution of 3mol / L NaOH, as an oxidation solution;
[0087] (3) Preparation of reducing solution: use deionized water as solvent, prepare 0.048mol / L MnCl 2 , 0.01mol / LCoCl 2 , 0.01mol / L Ce(NO 3 ) 3 , 0.01mol / L SnCl 2 15L of the mixed solution is used as the reducing solution;
[0088] (4) Impregnation of reducing solution: Pour 15L of reducing solution into a glass drum containing 1 kg of pretreated clinoptilolite, s...
Embodiment 2
[0094] Such as image 3 Shown, the treatment device of the ammonia nitrogen waste water described in the present embodiment, comprises: filter column 1, is packed with the MnO described in embodiment 1 in the filter column 1 2 -Co 2 o 3 -CeO 2 -SnO 2 Deammonization catalyst, the top of the filter column 1 is provided with a waste water inlet, the waste water inlet is connected with the water collection tank 2 through the first pipeline, the first pipeline is provided with a booster pump 3 and a flow meter 4, and the bottom of the filter column 1 is provided with a waste water outlet; An aeration inlet is also provided at the bottom of the column, and the aeration inlet is connected with the aeration pump 5 through a second pipeline, an air flow meter 6 is arranged on the second pipeline, and an aeration outlet is arranged at the top of the filter column. The filter column is made of plexiglass, with an inner diameter of 0.1 m and a height of 3 m.
[0095] The working proc...
Embodiment 3
[0097] This embodiment adopts the MnO of embodiment 1 2 -Co 2 o 3 -CeO 2 -SnO 2 For the deammonization catalyst, the ammonia nitrogen wastewater treatment device of Example 2 was used to treat the prepared ammonia nitrogen containing water, so as to test the ammonia nitrogen wastewater treatment ability of the catalyst. The MnO of Example 1 2 -Co 2 o 3 -CeO 2 -SnO 2 The deammonization catalyst is used to fill the filter column, and then the ammonia nitrogen wastewater treatment device is continuously operated, and the treated water is sampled and tested at regular intervals.
[0098] In this embodiment, an ammonium chloride water sample prepared with pure water as influent is used, wherein the concentration of ammonia nitrogen is about 40 mg / L. The prepared ammonia nitrogen wastewater is fed into the water through a peristaltic pump according to the hydraulic retention time of 60 minutes, and the water flow rate is 2BV / h. At the same time, the intake valve is opened f...
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