Catalytic oxidation decyanation method of cyanide-containing waste gas
A technology for catalytic oxidation and decyanation, applied in chemical instruments and methods, chemical elements of heterogeneous catalysts, separation methods, etc., can solve problems such as low cyanide efficiency
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Embodiment 1
[0046] 1. Catalyst preparation
[0047] In terms of weight ratio, ZrO 2 : Ru: Cu is 96:0.2:3.8 to prepare catalyst A-01.
[0048] 96 parts of ZrO 2 The catalyst support was impregnated in RuCl equivalent to 0.2 parts Ru at room temperature 3 and 3.8 parts Cu of Cu(NO 3 ) 2 Put in the aqueous solution overnight, dry at 80°C, and then calcined at 400°C in an air atmosphere for 4 hours to obtain catalyst A-01. The formulation of the catalyst is shown in Table 1.
[0049] 2. Catalyst evaluation
[0050] Cyanide-containing waste gas (acrylonitrile 1925ppm, hydrogen cyanide 240ppm) is mixed with air at a ratio of 1:5, and then passes through a fixed-bed reactor filled with 800mL A-01 catalyst. The reaction temperature in the reactor is 380°C, and the reaction space velocity is 12000h -1 . The reaction results are shown in Table 2.
Embodiment 2
[0052] 1. Catalyst preparation
[0053] In terms of weight ratio, SiO 2 : Ru: Cu is 96:0.2:3.8 to prepare catalyst A-02.
[0054] 96 parts of SiO 2 The catalyst support was impregnated in RuCl equivalent to 0.2 parts Ru at room temperature 3and 3.8 parts Cu of Cu(NO 3 ) 2 Put in the aqueous solution overnight, dry at 80°C, and then calcined at 400°C in an air atmosphere for 4 hours to obtain catalyst A-02. The formulation of the catalyst is shown in Table 1.
[0055] 2. Catalyst evaluation
[0056] Cyanide-containing waste gas (acrylonitrile 1925ppm, hydrogen cyanide 240ppm) is mixed with air at a ratio of 1:5, and then passes through a fixed-bed reactor filled with 800mL A-02 catalyst. The reaction temperature in the reactor is 380°C, and the reaction space velocity is 12000h -1 . The reaction results are shown in Table 2.
Embodiment 3
[0058] 1. Catalyst preparation
[0059] In terms of weight ratio, Al 2 o 3 : Ru: Cu is 96:0.2:3.8 to prepare catalyst A-03.
[0060] 96 Al 2 o 3 The catalyst support was impregnated in RuCl equivalent to 0.2 parts Ru at room temperature 3 and 3.8 parts Cu of Cu(NO 3 ) 2 Put in the aqueous solution overnight, dry at 80°C, and then calcined at 400°C in an air atmosphere for 4 hours to obtain catalyst A-03. The formulation of the catalyst is shown in Table 1.
[0061] 2. Catalyst evaluation
[0062] Cyanide-containing waste gas (acrylonitrile 1925ppm, hydrogen cyanide 240ppm) is mixed with air at a ratio of 1:5, and then passes through a fixed-bed reactor filled with 800mL A-03 catalyst. The reaction temperature in the reactor is 380°C, and the reaction space velocity is 12000h -1 . The reaction results are shown in Table 2.
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