Gold-base catalyst for room-temperature carbon monoxide removal and preparation method thereof
A gold catalyst, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the loss of active centers, complex carrier surface, gold particle agglomeration problem, to achieve the effect of convenient operation, simple process and good repeatability
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[0015] Example 1:
[0016] At room temperature, take 100mL of distilled water and place it in a 200mL beaker, disperse 0.1mL of chloroauric acid solution with a gold equivalent concentration of 9.6g / L in it, add 2.5g of urea under magnetic stirring, wait for the urea to dissolve, add 2g of Mn 2 O 3 The carrier was then placed in a water bath at 80°C, and after magnetic stirring for 1 hour, it was taken out and cooled to room temperature. The suspension was filtered and washed with deionized water several times, and the obtained solid was re-dispersed in 100 mL of distilled water. Stir magnetically at room temperature and irradiate it with a UV lamp for 1 hour, filter, wash several times, and dry it in an oven at 80°C for 12 hours. Finally, the obtained solid powder was calcined in a muffle furnace at 300°C for 2 hours to obtain a catalyst Au / Mn 2 O 3 .
[0017] Place 50 mg of catalyst in a fixed bed reactor, and introduce a mixed gas of 1% CO and 99% air at a flow rate of 20 mL / m...
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[0018] Example 2:
[0019] At room temperature, take 50mL of distilled water and place it in a 100mL beaker. Disperse 0.05mL of chloroauric acid solution with gold equivalent concentration of 9.6g / L in it. Add 2g of urea under magnetic stirring. After the urea is dissolved, add 1g of titanium oxide. (P25, Degussa company), then place it in a 80°C water bath, magnetically stir for 1 hour, take it out and cool to room temperature, filter the suspension and wash it with deionized water several times, and then disperse the resulting solid in 100 mL of distilled water. Stir magnetically at room temperature and irradiate it with a UV lamp for 1 hour, filter, wash several times, and dry it in an oven at 80°C for 12 hours. Finally, the obtained solid powder was calcined in a muffle furnace at 300°C for 2 hours to obtain a catalyst Au / P25.
[0020] The test was performed in accordance with the catalyst activity evaluation method described in Example 1. figure 1 The activity curve of a gold...
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