PtX-Fe-ZSM-5 molecular sieve catalyst for ammine selective catalytic oxidation
A catalytic oxidation and catalyst technology, applied in molecular sieve catalysts, physical/chemical process catalysts, separation methods, etc., can solve the problems of inability to adapt to working conditions, poor poisoning ability, poor low temperature activity, etc., and achieve superior sulfur resistance and convenience. The effect of simple operation and preparation process
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[0015] [Example 1]
[0016] Take 100g H-ZSM-5 powder carrier (specific surface area: 335m 2 / g), slowly poured into 400ml of an aqueous solution of 0.25mol / l ferrous chloride under constant stirring. Under the stirring of a magnetic stirrer, it was exchanged in a water bath at 90 °C for 1 h, washed with deionized water for several times, filtered, and dried at 100 °C overnight. Grind the dried filtrate and slowly pour it into 200ml of an aqueous solution of 0.5mol / l ferrous chloride under constant stirring. Under the stirring of a magnetic stirrer, after closed exchange in a water bath at 90 °C for 2 h, washed with deionized water for several times, filtered, and dried at 100 °C overnight. The dried catalyst was heated from room temperature to 550°C at a heating rate of 5°C / min in an air atmosphere, and calcined at 550°C for 3 h. The Fe-ZSM-5 catalyst A of Example 1 was prepared by sieving to 20-40 mesh particles for later use.
Example Embodiment
[0017] [Example 2]
[0018] Get the catalyst A of 100g embodiment 1, slowly pour 122ml 0.021035mol / l PtCl under constant stirring 4 in aqueous solution. After stirring for 1 h, the water was evaporated to dryness by rotary evaporation at 60 °C, and dried at 100 °C overnight. The dried catalyst was heated from room temperature to 550°C at a heating rate of 5°C / min in an air atmosphere, and calcined at 550°C for 3 h. Sieve the 20-40 mesh particles for later use, that is, to obtain the 0.5wt.Pt%-Fe-ZSM-5NH of Example 2 3 Oxidation Catalyst B.
Example Embodiment
[0023] [Example 3-6]
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