Catalyst for catalytic oxidation of formaldehyde and preparation method thereof
A catalytic oxidation and catalyst technology, applied in the chemical industry, can solve the problems of easy saturation of adsorbents, short life, and difficulty in realizing large-scale applications.
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Embodiment 1
[0048] Weigh 50g of ammonium phosphate, dissolve it in 200mL of deionized water to obtain solution A; grind 100g of petroleum coke into powder, then add it to solution A, let it stand for 1.5h, then filter, and put the obtained solid sample in an oven at 110°C Dry for 5h. At 200°C, pretreat the dried solid sample with water vapor for 3 hours (the volumetric space velocity of the water vapor gas is 800 hours -1 ), then raise the temperature to 400°C, continue pretreatment for 3h, and then cool to 60°C under nitrogen protection to obtain pretreated petroleum coke.
[0049] Grind the above-mentioned petroleum coke into powder, then mix it with 16.18g potassium permanganate, 9.87g cobalt nitrate and 300g potassium hydroxide, place it in a tube furnace, and raise the temperature to 800°C for 40min activation under nitrogen atmosphere.
[0050] Grind the above-mentioned activated sample into powder, weigh it, mix it with deionized water at a mass ratio of 1:15, stir thoroughly, and...
Embodiment 2
[0054] Weigh 50g of ammonium phosphate, dissolve it in 200mL of deionized water to obtain solution A; grind 100g of petroleum coke into powder, then add it to solution A, let it stand for 1.5h, then filter, and put the obtained solid sample in an oven at 110°C Dry for 5h. At 200°C, pretreat the dried solid sample with water vapor for 3 hours (the volumetric space velocity of the water vapor gas is 800 hours -1 ), then raise the temperature to 400°C, continue pretreatment for 3h, and then cool to 60°C under nitrogen protection to obtain pretreated petroleum coke.
[0055] Grind the above-mentioned petroleum coke to powder, then mix it with 16.18g of potassium permanganate, 8.56g of copper nitrate and 300g of potassium hydroxide, and place it in a microwave heating furnace with a microwave frequency of 2450MHz. Under the condition that the microwave power is 0.3kw Under a nitrogen atmosphere, the temperature was raised to 800°C for activation for 40 minutes.
[0056] Grind the...
Embodiment 3
[0060] Weigh 50g of ammonium phosphate, dissolve it in 200mL of deionized water to obtain solution A; grind 100g of petroleum coke into powder, then add it to solution A, let it stand for 1.5h, then filter, and put the obtained solid sample in an oven at 110°C Dry for 5h. At 200°C, pretreat the dried solid sample with water vapor for 3 hours (the volumetric space velocity of the water vapor gas is 800 hours -1 ), then raise the temperature to 400°C, continue pretreatment for 3h, and then cool to 60°C under nitrogen protection to obtain pretreated petroleum coke.
[0061] Grind the above-mentioned petroleum coke to powder, then mix it evenly with 16.18g potassium permanganate, 7.10g cerium nitrate and 300g potassium hydroxide, place it in a microwave heating furnace with a microwave frequency of 2450MHz, and vacuum it at a microwave power of 0.3 Under the condition of kw, the temperature was raised to 500°C and kept constant for 40 minutes, then nitrogen gas was introduced to ...
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Abstract
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