Method for ozonizing organic matters in wastewater by using activated carbon structured catalyst
A technology of structured catalyst and activated carbon, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Problems such as large pressure drop in the bed
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[0038]Example 1
[0039]This embodiment provides a method for preparing the activated carbon structured catalyst C1.
[0040]Step (1): Take 5 cylindrical honeycomb activated carbons with a diameter of 50 mm and a length of 100 mm, and wash them with deionized water to remove the floating dust on the surface. Put the washed honeycomb activated carbon into an oven and dry it at 110°C for 6 hours. Here, the wall thickness of the honeycomb activated carbon is 1mm, the shape of the honeycomb pores is square, and the volume density is 0.35g / cm3~0.60g / cm3, The specific surface area is 500m2 / g.
[0041]Step (2): Load 1 wt% Zr and 1 wt% Ce based on the quality of honeycomb activated carbon. The weight of the dried honeycomb activated carbon was weighed to be 291.22 g, and 1 mL of solution was absorbed per 1 g of honeycomb activated carbon, and 39.73 g of zirconium nitrate pentahydrate and 26.16 g of cerium nitrate hexahydrate were weighed to prepare 850 mL of impregnating solution.
[0042]Step (3): Imm...
Example Embodiment
[0043]Example 2
[0044]This embodiment provides a method for preparing the activated carbon structured catalyst C2.
[0045]Step (1): Take 5 cylindrical honeycomb activated carbons with a diameter of 50 mm and a length of 100 mm, and wash them with deionized water to remove the floating dust on the surface. Put the washed honeycomb activated carbon into an oven and dry it at 110°C for 6 hours. Here, the wall thickness of the honeycomb activated carbon is 1mm, the shape of the honeycomb pores is square, and the volume density is 0.35g / cm3~0.60g / cm3, The specific surface area is 500m2 / g.
[0046]Step (2): Load 2wt% Zr and 2wt% Ce based on the quality of honeycomb activated carbon. The weight of the dried honeycomb activated carbon was weighed to be 290 g, and 1 mL of solution was absorbed per 1 g of honeycomb activated carbon, and 79.13 g of zirconium nitrate pentahydrate and 52.10 g of cerium nitrate hexahydrate were weighed out to prepare 850 mL of impregnation solution.
[0047]Step (3): Imme...
Example Embodiment
[0048]Experimental example 1
[0049]The activated carbon structured catalysts C1 and C2 prepared in Example 1 and Example 2 were used to catalyze the ozone oxidation of methylene blue wastewater.
[0050]Before the experiment, the activated carbon structured catalyst was immersed in wastewater to make it fully absorbed and reduce the influence of activated carbon adsorption on the experimental results. The activated carbon structured catalysts C1 and C2 were respectively filled into the ozone reaction column, the filling volume was 980 mL, and the filling height was 50 cm (the inner diameter of the reactor is 5 cm, the overall diameter of the honeycomb catalyst is 5 cm, and the porous block catalyst is placed axially. Wastewater and ozone are continuously added from the bottom at the same time, and continuously flowed out from the upper outlet), the methylene blue wastewater concentration is 500mg / L, the influent volume is 2L / h, the ozone concentration of the influent is changed, and the...
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