Technique for improving capability of removing CO with supported nano-Au catalyst normal temperature oxidization
A technology of room temperature oxidation and catalytic oxidation, applied in molecular sieve catalysts, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve the problems of poor activity stability, etc., to improve performance, improve activity and Stability, the effect that is conducive to large-scale promotion
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[0017] Example 1
[0018] Au / TiO 2 Catalyst preparation
[0019] Weigh 1g of TiO 2 Powder (P25, particle size 50-70 mesh), add it to 100ml HAuCl with a gold content of 0.01g / ml 4 In the solution (the solution is adjusted to pH about 9 with 1mol / L NaOH solution in advance), heat to maintain the temperature at 70℃, continue to add 1mol / L NaOH solution dropwise, control the pH of the suspension to 9, stir for 2h and then age for 2h, filter to obtain a solid powder . Use 1mol / LNaBH 4 The solution reduces the powder, and then centrifugal wash with deionized water to remove Cl - , Na + , Dried at 80℃ to prepare the supported nano Au catalyst (Au / TiO 2 ). The content of Au in the catalyst is about 2.0 wt%.
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[0020] Example 2
[0021] Au / SiO 2 Catalyst preparation
[0022] Weigh 1g of SiO 2 (The particle size is 50-70 mesh). According to the same method in Example 1, Au / SiO 2 catalyst. The content of Au in the catalyst is about 2.0 wt%.
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[0023] Example 3
[0024] Au / Al 2 O 3 Catalyst preparation
[0025] Weigh 1g γ-Al 2 O 3 (The particle size is 50-70 mesh). According to the same method in Example 1, Au / Al 2 O 3 catalyst. The content of Au in the catalyst is about 2.0 wt%, respectively.
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