Preparation method for honeycomb ceramic catalyst having high-strength coating and used for treating PTA tail gas
A honeycomb ceramic, high-strength technology, used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of not mentioning the influence of high-strength coatings, short life, and high content of precious metals in catalysts, Achieve the effect of avoiding preparation costs, increasing life, and high coating strength
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Embodiment 1
[0024] Preparation of coating slurry: Mix 10g of pseudo-boehmite and 10g of water (1:1), add 1g of nitric acid, stir well, and put it into a ball mill for ball milling for 48 hours.
[0025] Fixing the honeycomb ceramic coating: put 5ml (3.25g) cylindrical cordierite honeycomb ceramics into a glass bottle, evacuate the glass bottle to a vacuum, then pour in the slurry, completely cover the honeycomb ceramics with the slurry, take it out after 20 minutes Honeycomb ceramics, use high-pressure air to blow out the residual liquid in the channels of honeycomb ceramics. The coated honeycomb ceramics were left at room temperature for 8 hours, and then dried in an oven at a heating rate of 0.5°C / min from 30°C to 120°C. Then bake the dried honeycomb ceramics in a muffle furnace from 120°C to 600°C at a heating rate of 0.5°C / min, which is designated as Catalyst I.
[0026] After the roasting is completed, weigh 3.52g, put the catalyst I into the ultrasonic cleaner, add water, completel...
Embodiment 2
[0028] Coating slurry preparation: mix 10g of pseudo-boehmite, 5g of urea, and 10g of water (1:0.5:1), add 1g of nitric acid, stir evenly, and put it into a ball mill for ball milling for 48 hours.
[0029] Fixing the honeycomb ceramic coating: put 5ml (3.22g) cylindrical cordierite honeycomb ceramics into a glass bottle, evacuate the glass bottle to a vacuum, then pour the slurry into it, completely cover the honeycomb ceramics with the slurry, take it out after 20 minutes Honeycomb ceramics, use high-pressure air to blow out the residual liquid in the channels of honeycomb ceramics. The coated honeycomb ceramics were left at room temperature for 8 hours, and then dried in an oven at a heating rate of 0.5°C / min from 30°C to 120°C. The dried honeycomb ceramics were fired in a muffle furnace from 120°C to 600°C at a heating rate of 0.5°C / min, which was designated as Catalyst II.
[0030] After the roasting is completed, weigh 3.54g, put the catalyst II into an ultrasonic clean...
Embodiment 3
[0032] Coating slurry preparation: mix 10g of pseudo-boehmite, 1g of urea, and 10g of water (1:0.1:1), add 1g of nitric acid, stir evenly, and put it into a ball mill for ball milling for 48 hours.
[0033] Honeycomb ceramic coating fixation: put 5ml (3.28g) cylindrical cordierite honeycomb ceramics into a glass bottle, evacuate the glass bottle to a vacuum, then pour in the slurry, completely cover the honeycomb ceramics with the slurry, take it out after 20 minutes Honeycomb ceramics, use high-pressure air to blow out the residual liquid in the channels of honeycomb ceramics. The coated honeycomb ceramics were left at room temperature for 8 hours, and then dried in an oven at a heating rate of 0.5°C / min from 30°C to 120°C. The dried honeycomb ceramics were fired in a muffle furnace from 120°C to 600°C at a heating rate of 0.5°C / min, which was designated as Catalyst III.
[0034] After the calcination, weigh 3.54g, put the catalyst III into the ultrasonic cleaner, add water,...
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