Heterogeneous Catalytic Wet Oxidation Catalyst
A technology of wet oxidation and heterogeneous catalysis, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, oxidized water/sewage treatment, etc., can solve low COD removal rate, low catalyst strength, etc. problem, to achieve the effect of COD removal rate improvement, catalyst strength improvement and good technical effect
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Embodiment 1
[0029] step 1)
[0030] Prepare 0.2mol / l Ti(SO 4 ) 2 1000ml of aqueous solution and 1000mL of 0.6mol / l ammonia water. Co-precipitation of titanium salt and ammonia water is used to form a gel precipitate, which is filtered, washed, dried, kneaded, extruded, pelletized, and roasted at 750°C for 5.5h to make TiO 2 spherical carrier.
[0031] Step 2)
[0032] 20g TiO 2 The spherical carrier was impregnated with 0.53g RuCl 3 ·nH 2 O solution. Impregnated at room temperature for 6h, then dried in an oven at 110°C for 16h, and then calcined in a muffle furnace at 480°C for 2.5h to obtain a catalyst precursor.
[0033] step 3)
[0034] Reduction with hydrogen at 400°C for 4 hours to obtain the finished catalyst C1.
[0035] The ratio of anatase:rutile in the catalyst was determined to be 90:10 by XRD peak area.
[0036] The catalyst composition is shown in Table 1, and the preparation conditions are shown in Table 2.
Embodiment 2
[0038] step 1)
[0039] Prepare 0.2mol / l Ti(SO4) 2 1000ml of aqueous solution and 1000mL of 0.6mol / l ammonia water. Co-precipitation of titanium salt and ammonia water is used to form a gel precipitate, which is filtered, washed, dried, kneaded, extruded, pelletized, and roasted at 780°C for 5.0h to make TiO 2 spherical carrier.
[0040] Step 2)
[0041] 20g TiO 2 The spherical carrier was impregnated with 0.34g PdCl 2in solution. Impregnated at room temperature for 6h, then dried in an oven at 110°C for 16h, and then calcined in a muffle furnace at 420°C for 3.6h to obtain a catalyst precursor.
[0042] step 3)
[0043] Reduction with hydrogen at 400°C for 3.5 hours to obtain the finished catalyst C2.
[0044] The ratio of anatase:rutile in the catalyst was determined to be 90:10 by XRD peak area.
[0045] The catalyst composition is shown in Table 1, and the preparation conditions are shown in Table 2.
Embodiment 3
[0047] step 1)
[0048] Prepare 0.2mol / l Ti(SO 4 ) 2 1000ml of aqueous solution and 1000mL of 0.6mol / l ammonia water. Co-precipitation of titanium salt and ammonia water is used to form a gel precipitate, which is filtered, washed, dried, kneaded, extruded, pelletized, and roasted at 800°C for 4.0h to make TiO 2 spherical carrier.
[0049] Step 2)
[0050] 20g TiO 2 The spherical carrier is impregnated with 0.56g H 2 PtCl 6 ·6H 2 O solution. Impregnated at room temperature for 6h, then dried in an oven at 110°C for 16h, and then calcined in a muffle furnace at 550°C for 2.2h to obtain a catalyst precursor.
[0051] step 3)
[0052] Reduction with hydrogen at 520° C. for 3 h gave the finished catalyst C3.
[0053] The ratio of anatase:rutile in the catalyst was determined to be 90:10 by XRD peak area.
[0054] The catalyst composition is shown in Table 1, and the preparation conditions are shown in Table 2.
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