Scr catalyst powder and its preparation method and application
An SCR catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of inability to remove CVOCs, limited improvement in denitration efficiency, and achieve excellent denitration synergistic removal of CVOCs. Activity, accelerate degradation, ensure the effect of acidity
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preparation example 1-5
[0049] Preparation Example 1-5 Preparation of SCR Catalyst Powder
[0050] The raw materials include: tungsten phosphate, vanadyl acetylacetonate, titanium dioxide, and / or molybdenum trioxide, and the content of the raw materials in each preparation example is shown in Table 1 below.
[0051] Measure the raw materials as shown in Table 1 and mix them initially, then add them into a ball mill tank and carry out ball milling for 50 min at a speed of 60 rpm, then the ball milled mixture is dried (110°C, 6h) and roasted in an air atmosphere. Carried out in a muffle furnace, including heating at a rate of 5 °C / min to 95 °C for 5 min; then heating at a rate of 8 °C / min to 280 °C and maintaining for 10 min; then heating at a rate of 8 °C / min to 500 °C keep for 2 hours. After the calcination, it is cooled with the furnace to obtain SCR catalyst powder with a particle size of 40-80 mesh.
[0052] Table 1
[0053]
preparation example 7-11
[0054] Preparation Example 7-11 Preparation of SCR Catalyst Powder
[0055] According to the preparation method and dosage of Preparation Example 1, replace the phosphotungstic acid and / or vanadyl acetylacetonate in Preparation Example 1 with the substances shown in Table 2 to prepare catalyst powder (wherein, the dash "-" in the table represents Same as the tungsten source or vanadium source of Preparation Example 1).
[0056] Table 2
[0057] Preparation example Tungsten source Vanadium source 7 WO 3
preparation example 12
[0058] Preparation Example 12 Preparation of SCR Catalyst Powder
[0059] Raw material consumption and composition are the same as Preparation Example 1, adopt the following preparation method:
[0060] Take the raw materials for preliminary mixing, and then put them into the ball mill tank for ball milling, ball milling for 40 minutes, the speed is 30 rpm; the ball milling mixture is taken out and dried at 110°C for 8 hours, and roasted in the air atmosphere: 10°C / min at room temperature to rapidly heat up to 110°C; Slowly raise the temperature at 2°C / min to 300°C; quickly raise the temperature to 500°C at 10°C / min, and keep it at 500°C for 4 hours; finally, cool with the furnace to obtain SCR catalyst powder.
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