Three-dimensional composite oxide catalyst for removing NO and coal smoke particles simultaneously and preparation method and application thereof
A composite oxide and three-dimensional composite technology, which is applied in the field of three-dimensional ordered macroporous composite oxide catalysts and their preparation, can solve the problems of unsatisfactory catalytic activity, inability to remove harmful substances, and reduce catalytic activity. Catalyst activity, short preparation cycle, and low catalyst cost
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[0067] Example 1: Preparation composition is Ce 0.5 Fe 0.4 Zr 0.1 O 2 3D composite oxide catalyst
[0068] At a stirring rate of 200r / min, 5.48g cerium ammonium nitrate, 3.23g ferric nitrate and 0.65g zirconium oxychloride (wherein, the molar ratio of cerium ammonium nitrate, ferric nitrate and zirconium oxychloride is 5:4:1 ) Is dissolved in a mixed solution of absolute ethanol and methanol, and then stirred uniformly at 25°C to form a precursor solution; weigh 6g of the template polymethyl methacrylate (PMMA) and add it to the precursor solution at room temperature (15~25 ℃) immerse for 12h, then suction filter, the solid obtained is dried at 40℃ for 2h; the dried solid is heated from room temperature (15~25℃) to 310℃ in a tubular heating furnace and kept for 4h, then at the same heating rate Heat up to 450℃ and keep it for 4h, then the composition is Ce 0.5 Fe 0.4 Zr 0.1 O 2 Three-dimensional composite oxide catalyst.
[0069] Characterize the obtained three-dimensional composi...
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[0072] Example 2: The preparation composition is Ce 0.6 Fe 0.3 Zr 0.1 O 2 3D composite oxide catalyst
[0073] At a stirring rate of 150~200r / min, dissolve 6.58g cerium ammonium nitrate, 2.42g iron nitrate and 0.86g zirconium nitrate (the molar ratio of cerium ammonium nitrate, iron nitrate and zirconium nitrate is 6:3:1) In a mixed solution of absolute ethanol and methanol, then stir evenly at 30°C to form a precursor solution; weigh 8g of the template agent polymethyl methacrylate (PMMA) and add it to the precursor solution at room temperature (15-25°C) Immerse for 15h, and then filter with suction. The solid obtained is dried at 50℃ for 3h; the solid obtained by drying is heated from room temperature (15~25℃) to 310℃ and kept for 4h in a tubular heating furnace, and then heated to the same temperature at the same rate 500℃ and keep for 5h, the composition is Ce 0.6 Fe 0.3 Zr 0.1 O 2 Three-dimensional composite oxide catalyst.
[0074] In a continuous flow fixed bed reactor, 0.3...
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[0076] Example 3: The preparation composition is Ce 0.7 Fe 0.2 Zr 0.1 O 2 3D composite oxide catalyst
[0077] Dissolve 7.68g cerium ammonium nitrate, 1.62g ferric nitrate and 0.86g zirconium nitrate (the molar ratio of cerium ammonium nitrate, ferric nitrate and zirconium nitrate is 7:2:1) at a stirring rate of 250~300r / min In a mixed solution of absolute ethanol and methanol, then stir evenly at 40°C to form a precursor solution; weigh 8g of template polymethylmethacrylate (PMMA) and add it to the precursor solution at room temperature (15~25°C) Immerse for 18h, then suction filter, the solid obtained is dried at 65℃ for 4h; the solid obtained by drying is heated in a tubular heating furnace from room temperature (15~25℃) to 310℃ and kept for 4h, and then heated to the same temperature at the same rate 550℃ and keep it for 4h, the composition is Ce 0.7 Fe 0.2 Zr 0.1 O 2 Three-dimensional composite oxide catalyst.
[0078] In a continuous flow fixed bed reactor, 0.2gCe 0.7 Fe 0.2...
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