A kind of SCR denitration catalyst and preparation method thereof
A technology of SCR catalyst and denitration catalyst, which is applied in the field of SCR denitration catalyst and its preparation, can solve the problems of insufficient commercial application of vanadium-based denitration catalyst, and achieve the effects of moderate strength, low preparation cost and improved economic benefits.
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[0029] Such as figure 1 Shown, the preparation method of the SCR denitration catalyst of the embodiment of the present invention comprises the following steps:
[0030] S101: Preparation of the mixture: disperse the pottery clay, component 1 and component 2 in the solution solvent, and mix uniformly;
[0031] S102: Forming and drying: put the mixture into a mold, press and form it, and dry it at 110°C for 12 hours;
[0032] S103: Calcination: the dried product is calcined at high temperature for 2 hours, taken out and cooled, crushed and sieved to a particle size of 10-20 mesh;
[0033] S104: pickling treatment: soak the obtained crushed material in nitric acid solution at 80°C for 2 hours, rinse with deionized water until neutral, and dry;
[0034] S105: Preparation of the mixed solution: dissolving the precursor substances of manganese and cerium metals in a certain aqueous solution, stirring and mixing;
[0035] S106: mixing: soak the dried substance described in step S1...
Embodiment 1
[0047]Disperse clay, sodium silicate, and coal powder in water solvent according to the mass ratio of 50%: 15%: 35%. After ball milling and mixing evenly, put it into a mold (8mm in diameter) and press it under 10MPa, and place it in an oven at 110°C. Dry in medium for 12h. After drying, the sample was placed in an atmosphere furnace, calcined at 1000°C for 2 hours under the protection of nitrogen atmosphere, cooled to room temperature, crushed and sieved to 10-20 mesh. Soak the crushed sample in 50% nitric acid solution, heat at 80°C for 2h, rinse with deionized water until neutral, and dry at 110°C. Mix a certain amount of manganese nitrate and cerium nitrate to obtain a precursor solution, soak the acid-treated sample in the precursor solution, let it stand for 24 hours, dry it in a water bath at 60°C, dry it at 110°C for 12 hours, and place it under a nitrogen atmosphere at 400°C After calcination for 2 hours, the SCR catalyst was obtained. In the obtained SCR catalyst, ...
Embodiment 2
[0049] Disperse the clay, sodium silicate and coal powder in the water solvent according to the mass ratio of 60%: 15%: 25%. After the ball mill is mixed evenly, put it into a mold (8mm in diameter) and press it under 10MPa, and place it in an oven at 110°C. Dry in medium for 12h. After drying, the sample was placed in an atmosphere furnace, calcined at 1000°C for 2 hours under the protection of nitrogen atmosphere, cooled to room temperature, crushed and sieved to 10-20 mesh. Soak the crushed sample in 30% nitric acid solution, heat at 80°C for 2h, rinse with deionized water until neutral, and dry at 110°C. Mix a certain amount of manganese nitrate and cerium nitrate to obtain a precursor solution, soak the acid-treated sample in the precursor solution, let it stand for 24 hours, Ce is 10%, 60 ° C water bath drying, 110 ° C drying for 12 hours, 400 °C under nitrogen atmosphere for 2 h to obtain the SCR catalyst. In the obtained SCR catalyst, the proportion of Mn is 7%, and ...
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