SCR (Selective Catalytic Reduction) de-nitration catalyst based on natural manganese iron ore as well as preparation method and application method thereof
A kind of denitration catalyst, technology of application method
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Embodiment 1
[0035] A kind of preparation method of the SCR denitrification catalyst based on natural ferromanganese ore of the present embodiment, its steps are: the natural ferromanganese ore is crushed and ground by pulverizer, and then sieved with 100 mesh sieves, and The screened powder was placed in a muffle furnace and calcined at 450°C for 5 hours, then cooled to room temperature and sealed for storage to obtain the SCR denitration catalyst particles of this example, the particle size of which was less than 150 μm, and the SCR denitration catalyst obtained in this example The average particle diameter of the particles was 120 μm. The natural ferromanganese ore in this embodiment is collected from the Beihai area of Guangxi, and contains iron oxides, manganese oxides and aluminum oxides, wherein the mass ratio of iron to manganese is 1:1, and the mass ratio of iron to aluminum is 3:1 , the specific surface area of the natural ferromanganese ore is 35m 2 / g.
[0036] It is wort...
Embodiment 2
[0047] The preparation method of a SCR denitrification catalyst based on natural ferromanganese ore in this embodiment comprises the steps of: crushing and grinding the natural ferromanganese ore with a pulverizer, and then sieving with a 100-mesh sieve The screened powder was placed in a muffle furnace for calcination at 400° C. for 6 hours, then cooled to room temperature and sealed for storage to obtain the SCR denitration catalyst particles of this example, with an average particle size of 145 μm. The natural ferromanganese ore in this embodiment contains iron oxides, manganese oxides and aluminum oxides, wherein the mass ratio of iron to manganese is 1:2, and the mass ratio of iron to aluminum is 9:1. The natural ferromanganese The specific surface area of the ore is 25m 2 / g.
[0048] Weigh 1g of the prepared catalyst powder, place it in a drying oven at 120°C for 3 hours and dry it for 3 hours, then put it into the catalytic denitration reaction tube, wrap it with th...
Embodiment 3
[0051] The preparation method of a SCR denitrification catalyst based on natural ferromanganese ore in this embodiment comprises the steps of: crushing and grinding the natural ferromanganese ore with a pulverizer, and then sieving with a 100-mesh sieve The screened powder was placed in a muffle furnace and calcined at 600° C. for 3 hours, then cooled to room temperature and sealed for storage to obtain the SCR denitration catalyst particles of this example, with an average particle size of 70 μm. The natural ferromanganese ore of this embodiment contains iron oxides, manganese oxides and aluminum oxides, wherein the mass ratio of iron-manganese elements is 1:3, and the mass ratio of iron-aluminum elements is 5:1. The natural ferromanganese The specific surface area of the ore is 60m 2 / g.
[0052] Take out 0.3g of the prepared catalyst powder, put it in a drying oven at 110°C for 4 hours and dry it for 4 hours, then put it into the catalytic denitration reaction tube, wrap...
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