Production process of SCR (selective catalytic reduction) catalyst with pyrophyllite as carrier
A technology of SCR catalyst and production process, which is applied in the production process of honeycomb SCR catalyst and the field of flue gas denitrification, to achieve high thermal stability, high consistency, and improve the yield of good products
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[0025] Below in conjunction with embodiment the present invention is described in further detail:
[0026] (1) Select siliceous pyrophyllite from Shangyu, Zhejiang, and crush it to a size greater than 400 mesh.
[0027] (2) Carrier granulation. Under the stirring condition of 100 rpm, the pyrophyllite, stearic acid, lactic acid, water and ammonia water were mixed in a mass ratio of 500:1:5:170:35. Then adjust the mixing machine rotating speed to 500rpm, after material friction heats up to 60-70 DEG C, open exhaust valve drainage granulation, obtain the pyrophyllite particle of diameter 5-10mm water content 20%.
[0028] (3) Excessive layer load. Under the stirring condition of 100 rpm, the obtained pyrophyllite particles, tungsten-doped titanium dioxide, hydroxypropylmethylcellulose, polyethylene oxide and ammonia water were mixed in a mass ratio of 125:850:1:2.5:12. Then adjust the mixer to 300rpm, and load the tungsten-doped titanium dioxide on the surface of the pyrophyl...
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