SCR catalyst and preparation method thereof
A SCR catalyst and catalyst technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of catalytic efficiency decline, poisoning, etc., and achieve surface acidity enhancement, weakening adsorption, and promoting Effects of dispersion and electronic properties
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Embodiment 1
[0047] Example 1: CeO 2 Preparation of @TNT:
[0048] A preparation method of a composite metal MOF-derived highly sulfur-resistant low-temperature SCR denitration catalyst, comprising the steps of:
[0049] (1) Preparation of defect-rich TNT
[0050] Dissolve 2 g of commercially available P25 titanium dioxide powder in 80 mL of 10 mol / L NaOH solution and stir for 0.5 h to obtain a mixed solution, then transfer the mixed solution to a 100 mL hydrothermal kettle and keep it at 120°C for 12 h.
[0051] After cooling to room temperature, wash with 0.1mol / L HCl solution to pH 2, then wash with deionized water until neutral, and dry at 80°C for 12h to obtain titanium nanotube TNT-g.
[0052] The obtained vector TNT-g was placed in N 2 Treat at 300°C for 4h under atmosphere to obtain defect-rich TNT.
[0053] (2)CeO 2 Preparation of @TNT
[0054] Dissolve 0.65g of praseodymium nitrate hexahydrate in 30mL of ethanol, stir for 0.5h, add 0.8g of degassed TNT to the solution, stir...
Embodiment 2
[0055] Example 2: CeFe 0.1 PR 0.2 o x Preparation of @TNT
[0056] Dissolve 0.05g of praseodymium nitrate hexahydrate, 0.024g of ferric nitrate nonahydrate and 0.25g of cerium nitrate hexahydrate in 25mL of water, stir for 0.5h and then add 0.4g of 300°C N 2 After degassing the TNT under the atmosphere, stir for 1 h, while raising the reaction temperature to 60 ° C, then slowly add 30 mL of ethanol dissolved in 0.15 g of N,N-dimethylimidazole and continue stirring for 3 h, centrifuge the resulting suspension The obtained solid was dried at 110°C, and then calcined at 300°C for 2 hours in an air atmosphere in a muffle furnace. The sample was marked as CeFe 0.1 PR 0.2 o x @TNT.
Embodiment 3
[0057] Example 3: CeFe 0.15 PR 0.15 o x Preparation of @TNT
[0058] Dissolve 0.3g of cerium nitrate hexahydrate, 0.052g of ferric nitrate nonahydrate and 0.056g of praseodymium nitrate hexahydrate in 30mL of ethanol, stir for 0.5h and then add 0.6g of 300°C N 2 After degassing TNT under the atmosphere, stir for 1 h, while raising the reaction temperature to 60 ° C, then slowly add 40 mL of ethanol dissolved with 0.37 g of terephthalic acid and continue stirring for 5 h, centrifuge the resulting suspension to obtain a solid in Dry at 110°C, then bake at 300°C for 3 hours in an air atmosphere in a muffle furnace, the sample is marked as CeFe 0.15 PR 0.25 o x @TNT.
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