Method for preparing heterogeneous Fenton-system high-stability solid catalyst
A solid catalyst and high stability technology, which is applied in the field of wastewater treatment catalysts, can solve the problems of small catalyst surface area, catalyst instability, and low treatment temperature, etc., and achieve the effect of improving specific surface area, strong practicability, and stable performance
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Embodiment 1
[0036] Preparation of Catalyst A:
[0037] I) Prepare a mixture having the following composition:
[0038] a) Weigh 800g of alumina trihydrate (>200 mesh);
[0039] b) Weigh 200g Fe(NO 3 ) 3 9H 2 O;
[0040] c) Weigh 12.5g 20-60 mesh carbon powder and 37.5g 60-300 mesh carbon powder;
[0041] d) Weigh 250g of nitric acid aqueous solution (water: nitric acid=10);
[0042] e) mixing the above-mentioned substances to form a mixture;
[0043] II) Add an appropriate amount of deionized water to the mixture obtained in step I while mixing, make it fully mixed and kneaded evenly, so that Fe(NO 3 ) 3 9H 2 O is fully wetted and impregnated on alumina trihydrate, and then extruded to obtain a strip-shaped catalyst precursor with a diameter of 3mm;
[0044] Ⅲ) Calcined at 900°C for 2 hours to obtain a specific surface area of 58m 2 / g of Fenton solid catalyst A.
[0045] The Fenton oxidation reaction performance test conditions of catalyst A: the oxidation reaction performanc...
Embodiment 2
[0048] Preparation of Catalyst B:
[0049] I) Prepare a mixture having the following composition:
[0050] a) Weigh 600g of alumina monohydrate (>200 mesh);
[0051] b) Weigh 200g Fe 2 (SO 4 ) 3 9H 2 O and 200g FeSO 4 ·7H 2 O;
[0052] C) take by weighing 50g 20-60 order graphite and 50g 60-300 order graphite;
[0053] d) Weigh 600g of nitric acid aqueous solution (water: nitric acid=1.25);
[0054] e) mixing the above-mentioned substances to form a mixture;
[0055] II) Add an appropriate amount of deionized water to the mixture obtained in step I while mixing, make it fully mixed and kneaded, and make the soluble Fe 2 (SO 4 ) 3 9H 2 O, FeSO 4 ·7H 2 O is fully wetted and impregnated on alumina trihydrate, and then extruded to obtain a strip-shaped catalyst precursor with a diameter of 5 mm;
[0056] Ⅲ) Calcined at 900°C for 4 hours to obtain a specific surface area of 52m 2 / g of Fenton solid catalyst B.
[0057] The Fenton oxidation reaction performance t...
Embodiment 3
[0059] Preparation of Catalyst C:
[0060] I) Prepare a mixture having the following composition:
[0061] a) Weigh 700g of fake alumina monohydrate (>200 mesh);
[0062] b) Weigh 300g FeCl 2 4H 2 O;
[0063] c) Weigh 225g 20-60 mesh polyethylene and 75g 60-300 mesh polyethylene;
[0064] d) Weigh 400g nitric acid aqueous solution (water: nitric acid=3);
[0065] e) mixing the above-mentioned substances to form a mixture;
[0066] II) Add an appropriate amount of deionized water to the mixture obtained in step I while mixing, make it fully mixed and kneaded, and make the soluble FeCl 2 4H 2 O is fully wetted and impregnated on alumina trihydrate, and then extruded to obtain a strip-shaped catalyst precursor with a diameter of 5 mm;
[0067] Ⅲ) Calcined at 900°C for 3 hours to obtain a specific surface area of 96m 2 / g of Fenton solid catalyst C.
[0068] The Fenton oxidation reaction performance test conditions of catalyst C are the same as in Example 1, and the te...
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