Cu-Er or Cu-Nb loaded sodium modified sepiolite composite catalyst preparation method and application
A technology of sepiolite and catalyst, which is applied in the field of preparation and application of sodium sepiolite supported Cu-Er or Cu-Nb composite catalyst, can solve the problems such as few studies on formaldehyde, and achieve good stability and good catalysis The effect of eliminating the effect
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Embodiment 1
[0027] (1) The preparation process is as follows: add Na in 2wt% sepiolite aqueous solution 2 CO 3 Stir, the mass ratio of sodium / sepiolite is 4:100, and stir evenly at 60°C for 2h. Then it was aged at room temperature for 24 h, filtered with deionized water, washed, and dried at 80 °C for 24 h, and the obtained sodium sepiolite was expressed as NaSep.
[0028] Add copper nitrate to deionized water to configure a 0.02mol / L copper nitrate solution. Cu / NaSep samples were prepared by the rotary evaporation method. The volume of copper nitrate solution with the above concentration calculated according to the mass ratio of Cu-loaded sodium sepiolite (Cu wt%=2wt%) was added to 3g of the above-mentioned sodium sepiolite, and after stirring at 60°C for 1h, the mixed solution was filled In an eggplant-shaped bottle, perform rotary evaporation at a water temperature of 60°C until the solution evaporates to dryness. The sample was taken out, dried at 120°C for 24h, and then calcined ...
Embodiment 2
[0031] (1) The preparation process is as follows: add Na in 2wt% sepiolite aqueous solution 2 CO 3 Stir, the mass ratio of sodium / sepiolite is 4:100, and stir evenly at 60°C for 2h. Then it was aged at room temperature for 24 h, filtered with deionized water, washed, and dried at 80 °C for 24 h, and the obtained sodium sepiolite was expressed as NaSep.
[0032] Add copper nitrate and erbium nitrate to deionized water respectively, and prepare 0.03mol / L copper nitrate and 0.001mol / L erbium nitrate solution. (Cu wt%=3wt%, Erwt%=0.1wt%) add the volume of copper nitrate and erbium nitrate solution of the above concentration calculated into 3g of the above-mentioned sodium sepiolite, and the mixed solution is packed into an eggplant-shaped bottle, at 60°C Rotary evaporation was carried out at the water temperature until the solution evaporated to dryness. The samples were taken out and dried at 120°C for 24h. Then calcined at 450° C. for 2 h to obtain a composite Cu-Er / NaSep-I ...
Embodiment 3
[0035] (1) The preparation process is as follows: add Na in 2wt% sepiolite aqueous solution 2 CO 3 Stir, the mass ratio of sodium / sepiolite is 4:100, and stir evenly at 60°C for 2h. Then it was aged at room temperature for 24 h, filtered with deionized water, washed, and dried at 80 °C for 24 h, and the obtained sodium sepiolite was expressed as NaSep.
[0036] Add copper nitrate and erbium nitrate to deionized water respectively, and prepare 0.05mol / L copper nitrate and 0.003mol / L erbium nitrate solution. (Cu wt%=5wt%, Erwt%=0.3wt%) the volume of copper nitrate and erbium nitrate solution of the above concentrations calculated is added to 3g of the above-mentioned sodium sepiolite, and the mixed solution is packed into an eggplant-shaped bottle, at 60°C Rotary evaporation was carried out at the water temperature until the solution evaporated to dryness. The samples were taken out and dried at 120°C for 24h. Then calcined at 450° C. for 2 h to obtain a composite Cu-Er / NaSe...
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