Hydrogen sulfide selective oxidation catalyst as well as preparation method and application thereof
An oxidation catalyst and selective technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of poor catalyst activity, low specific surface area, poor stability, etc. problem, to achieve the effect of high selectivity, enhanced activity, and good stability
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Embodiment 1
[0035]Weigh 0.01 mol of potassium permanganate and 0.5 mmol of cerium nitrate hexahydrate, add them into 60 mL of deionized water, and stir at room temperature for 10 min. Then add 0.001 mol of ascorbic acid weighed into 10 mL of deionized water, and stir at room temperature for 10 min. Then add the aqueous solution of reducing precipitant to the mixed solution of potassium permanganate and cerium nitrate hexahydrate, and continue to stir at room temperature for 10 minutes. Then the solution was transferred to a 100mL autoclave for 100°C hydrothermal treatment for 24 hours. After the reaction was completed, the autoclave was naturally cooled to room temperature, the precipitate was washed and filtered with deionized water, and dried at 100°C for 12 hours. Then the cerium-modified manganese dioxide catalyst was obtained after calcination at a rate of 3°C / min to 300°C for 3 hours, named 5Ce-MnO 2 .
Embodiment 2
[0037] Weigh 0.01mol of potassium permanganate and 0.001mol of cerium nitrate hexahydrate, add them into 60mL of deionized water, and stir at room temperature for 10min. Then add 0.001 mol of ascorbic acid weighed into 10 mL of deionized water, and stir at room temperature for 10 min. Then add the aqueous solution of reducing precipitant to the mixed solution of potassium permanganate and cerium nitrate hexahydrate, and continue to stir at room temperature for 10 minutes. Then the solution was transferred to a 100mL autoclave for 100°C hydrothermal treatment for 24 hours. After the reaction was completed, the autoclave was naturally cooled to room temperature, the precipitate was washed and filtered with deionized water, and dried at 100°C for 12 hours. Then the cerium-modified manganese dioxide catalyst was obtained after roasting at 300°C at a heating rate of 3°C / min, named 10Ce-MnO 2 .
Embodiment 3
[0039] Weigh 0.01 mol of potassium permanganate and 0.005 mol of cerium nitrate hexahydrate, add them into 60 mL of deionized water, and stir at room temperature for 10 min. Then add 0.001 mol of ascorbic acid weighed into 10 mL of deionized water, and stir at room temperature for 10 min. Then add the aqueous solution of reducing precipitant to the mixed solution of potassium permanganate and cerium nitrate hexahydrate, and continue to stir at room temperature for 10 minutes. Then the solution was transferred to a 100mL autoclave for 100°C hydrothermal treatment for 24 hours. After the reaction was completed, the autoclave was naturally cooled to room temperature, the precipitate was washed and filtered with deionized water, and dried at 100°C for 12 hours. Then the cerium-modified manganese dioxide catalyst was obtained after calcination at a rate of 3°C / min to 300°C for 3 hours, named 50Ce-MnO 2 .
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