A kind of nitrogen functionalized semi-coke modification method
A technology of functional grouping and modification method is applied in the field of semi-coke modification by means of high temperature and high pressure water vapor activation and ammonia microwave activation, which can solve the problems of expensive precious metals, easy deactivation of transition metals, limited resources, etc. The effect of reducing the content of acidic groups and increasing the catalytic activity
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Embodiment 1
[0020] Weigh 100g of Hongce lignite semi-coke and place it in a high-temperature and high-pressure reaction kettle, add 600ml of distilled water to completely impregnate the semi-coke, activate it at 250°C and 3.2Mpa for 2h, take it out and cool it naturally, and dry it at 105°C for 2h.
[0021] Prepare 300ml of ammonia solution with a volume concentration of 8%, add 50g of the above-mentioned high-temperature and high-pressure water vapor to activate the semi-coke, so that the semi-coke is completely impregnated by the ammonia solution. After soaking for 30 minutes, put it into a microwave generator with a power of 800W and irradiate it with microwaves for 18 minutes. Cool After drying at 110°C for 2 hours, a nitrogen-functionalized semi-coke catalyst (sample I) was obtained.
[0022] figure 1 It is the infrared spectrogram of macro-measured lignite semi-coke before and after modification. Depend on figure 1 It can be seen that after high temperature and high pressure steam...
Embodiment 2
[0026] Weigh 100g of Datong bituminous coal semi-coke and place it in a high-temperature and high-pressure reaction kettle, add 500ml of distilled water to completely impregnate the semi-coke, activate it at 200°C and 4.6Mpa for 2h, take it out and cool it naturally, and dry it at 105°C for 2h.
[0027] Prepare 250ml of ammonia solution with a volume concentration of 10%, add 50g of the above-mentioned high-temperature and high-pressure water vapor to activate the semi-coke, so that the semi-coke is completely impregnated by the ammonia solution. After soaking for 30 minutes, put it into a microwave generator with a power of 1000W and irradiate it with microwaves for 20 minutes. Cool down After drying at 110°C for 2 hours, a nitrogen-functionalized semi-coke catalyst (sample II) was obtained.
[0028] figure 2 It is the infrared spectrum of Datong bituminous coal semi-coke before and after modification. Depend on figure 2 It can be seen that after high temperature and high...
Embodiment 3
[0031] Weigh 100g of Jincheng anthracite semi-coke and place it in a high-temperature and high-pressure reaction kettle, add 400ml of distilled water to completely impregnate the semi-coke, activate it at 300°C and 4.2Mpa for 2h, take it out and cool it naturally, and dry it at 105°C for 2h.
[0032] Prepare 350ml of ammonia solution with a volume concentration of 12%, add 50g of the above-mentioned high-temperature and high-pressure water vapor to activate the semi-coke, so that the semi-coke is completely impregnated by the ammonia solution, after soaking for 30 minutes, put it into a microwave generator with a power of 900W and irradiate it with microwaves for 25 minutes, and cool After drying at 110°C for 2 hours, a nitrogen-functionalized semi-coke catalyst (sample III) was prepared.
[0033] image 3 It is the infrared spectrum of Jincheng anthracite semi-coke before and after modification. Depend on image 3 It can be seen that after high temperature and high pressure...
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