Immobilized ionic liquid low-temperature denitrification catalyst and preparation method thereof
An ionic liquid and low-temperature denitrification technology, which is applied in separation methods, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of short service life and poor stability of low-temperature denitrification catalysts, and improve service life, structure and catalysis Adjustable performance and high catalytic activity
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Embodiment 1
[0011] 1) Preparation of imidazole-based ionic liquids: Add n-chlorobutane and N-methylimidazole at a molar ratio of 1.2:1 into a three-neck flask, use toluene as a solvent, and store at 80°C under an argon protective atmosphere. Stirring and reflux for 48h. After the reaction, the product was separated to remove part of the solvent and unreacted substances, washed repeatedly with ethyl acetate, the remaining ethyl acetate was distilled under reduced pressure, and dried in vacuum at 80°C for 12 hours to obtain light yellow 1-butyl-chloride 3 Methylimidazole ([Bmin]Cl) ionic liquid.
[0012] 2) Preparation of mesoporous molecular sieve MCM-41: Weigh 2.0 g of cetyltrimethylammonium bromide (CTAB) and dissolve it in 270 mL of deionized water, heat and stir until CTAB is completely dissolved, then add 205 mL of ammonia water (25 wt %), stirred until homogeneous, slowly added 10 mL tetraethyl orthosilicate (TEOS) dropwise, and continued to stir at room temperature for 12 h. The ob...
Embodiment 2
[0015] 1) Preparation of imidazole-based ionic liquids: Add n-chlorobutane and N-methylimidazole at a molar ratio of 1.2:1 into a three-neck flask, use toluene as a solvent, and store at 80°C under an argon protective atmosphere. Stirring and reflux for 48h. After the reaction, the product was separated to remove part of the solvent and unreacted substances, washed repeatedly with ethyl acetate, the remaining ethyl acetate was distilled under reduced pressure, and dried in vacuum at 80°C for 12 hours to obtain light yellow 1-butyl-chloride 3 Methylimidazole ([Bmin]Cl) ionic liquid.
[0016] 2) Preparation of mesoporous molecular sieve MCM-48: Weigh 5.2 g cetyltrimethylammonium bromide and dissolve it in 240 g deionized water, heat and stir until CTAB is completely dissolved, then add 30 mL ammonia water and stir for 30 min, slowly Add 6.8 g of tetraethyl orthosilicate dropwise, and continue to stir at room temperature for 12 h. The resulting reaction product is suction-filter...
Embodiment 3
[0019] 1) Preparation of imidazole-based ionic liquids: Add n-chlorobutane and N-methylimidazole at a molar ratio of 1.2:1 into a three-neck flask, use toluene as a solvent, and store at 80°C under an argon protective atmosphere. Stirring and reflux for 48h. After the reaction, the product was separated to remove part of the solvent and unreacted substances, washed repeatedly with ethyl acetate, the remaining ethyl acetate was distilled under reduced pressure, and dried in vacuum at 80°C for 12 hours to obtain light yellow 1-butyl-chloride 3 Methylimidazole ([Bmin]Cl) ionic liquid.
[0020] 2) Preparation of MIL-101 (MOFs material): Weigh 4.0g of Cr(NO3)2•6H2O and dissolve it in 60mL of deionized water. After fully dissolving, add 1.6613g of terephthalic acid, and drop 10 Drop HF solution. Then transfer the mixed solution into a 100mL stainless steel autoclave (polytetrafluoroethylene inner village), raise the temperature to 220°C in an oven at a rate of 1°C / min, and crystall...
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