Preparation method of spherical low-temperature denitration catalyst, spherical low-temperature denitration catalyst prepared by method and application of catalyst
A low-temperature denitration and catalyst technology, which is applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high cost, complex preparation process, poor denitration efficiency, etc., and achieves low cost and preparation process. The effect of a simple, low temperature window
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[0030] The present invention proposes a preparation method of a spherical low-temperature denitration catalyst, which comprises the following steps:
[0031] 1) adding the metal salt and the spherical carrier into water in turn, and stirring to obtain a mixed solution;
[0032] 2) adding an alkaline precipitant to the mixed solution to adjust the pH of the system to be alkaline;
[0033] 3) the above-mentioned system is placed in a reactor for hydrothermal reaction;
[0034] 4) washing the product of the above-mentioned hydrothermal reaction with clear water, and drying;
[0035] 5) Calcining the dried product above to obtain a spherical low-temperature denitration catalyst.
[0036] Preferably, the aforementioned method for preparing a spherical low-temperature denitration catalyst, wherein the metal salt includes a soluble manganese salt and auxiliary components; the auxiliary components are iron salts, copper salts, cobalt salts, nickel salts of transition metal salts At...
Embodiment 1
[0066] Calculate and measure 6.74g of manganese nitrate solution (50wt%), weigh 2.10g of cerium nitrate hexahydrate and dissolve it in 15mL of water, then add 20g of gamma-Al 2 o 3 Place in the above solution, stir magnetically at room temperature for 10 minutes; then add 3 g of urea, stir to dissolve it, place it in a reaction kettle at 120°C for hydrothermal reaction, and the reaction time is 12 hours; wash it with clean water, and dry it in an oven at 100°C ; Finally, calcining and activating at 500° C. for 3 hours in a muffle furnace to prepare a spherical low-temperature denitration catalyst.
Embodiment 2
[0068] Calculate and measure 6.74g of manganese nitrate solution (50wt%), weigh 1.26g of cerium nitrate hexahydrate and dissolve it in 15mL of water, then add 20g of gamma-Al 2 o 3 Place in the above solution, stir magnetically at room temperature for 10 minutes; then add 3 g of urea, stir to dissolve it, place it in a reaction kettle at 120°C for hydrothermal reaction, and the reaction time is 12 hours; wash it with clean water, and dry it in an oven at 100°C ; Finally, calcining and activating at 500° C. for 3 hours in a muffle furnace to prepare a spherical low-temperature denitration catalyst.
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