Preparation method of activated carbon with high specific surface area
A technology of high specific surface area and activated carbon, which is applied in the field of activated carbon preparation, can solve the problem of increasing the specific surface area of activated carbon, and achieve the effect of excellent adsorption performance and high specific surface area
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Embodiment 1
[0019] Step (1): After soaking sawdust in water for 3 days, take out the soaked sawdust from the water, and freeze at -10°C for 0.5h; obtain the frozen material;
[0020] Step (2): Put the frozen material into a high-temperature furnace, rapidly heat up to 450°C at a heating rate of 80°C / min under the protection of a nitrogen atmosphere, and carbonize at a high temperature of 450°C for 0.5h; after cooling to room temperature get carbonized material;
[0021] Step (3): Dissolve the carbonized material and zinc chloride in water according to the mass ratio of 1:2 and mix them evenly; then dry at 80°C for 2 hours; put them in a high-temperature furnace after drying, and place them in a nitrogen atmosphere at 800°C Activate at high temperature for 1 hour; then cool to room temperature to obtain the activated material;
[0022] Step (4): Add the activated material obtained in step (3) into a 2M hydrochloric acid solution, heat and reflux at 50°C and stir for 40 minutes; then wash ...
Embodiment 2
[0024] Step (1): soak sawdust in water for 5 days, take out soaked sawdust from water, and freeze at -8°C for 1 hour; obtain frozen material;
[0025] Step (2): Put the frozen material into a high-temperature furnace, rapidly heat up to 500°C at a rate of 90°C / min under the protection of an argon atmosphere, and carbonize at 500°C for 1 hour; after cooling to room temperature get carbonized material;
[0026] Step (3): Dissolve the carbonized material and zinc chloride in water according to the mass ratio of 1:3 and mix them evenly; then dry at 80°C for 2 hours; put them in a high-temperature furnace after drying, and heat them at 850°C under an inert atmosphere Activate at high temperature for 1.5h; then cool to room temperature to obtain the activated material;
[0027] Step (4): Add the activated material obtained in step (3) into a 2M hydrochloric acid solution, heat and reflux at 60°C and stir for 30 minutes; then wash with water until neutral, dry at 100°C for 8 hours, ...
Embodiment 3
[0029] Step (1): After soaking wood chips in water for 6 days, take out the soaked wood chips from the water, and freeze them at -5°C for 1.5 hours; obtain frozen materials;
[0030] Step (2): Put the frozen material into a high-temperature furnace, rapidly heat up to 500°C at a heating rate of 100°C / min under the protection of a nitrogen atmosphere, and carbonize at 500°C for 1.5 hours; after cooling to room temperature get carbonized material;
[0031] Step (3): Dissolve the carbonized material and zinc chloride in water according to the mass ratio of 1:3 and mix them evenly; then dry at 80°C for 2 hours; put them in a high-temperature furnace after drying, and heat them at 900°C under an inert atmosphere Activate at high temperature for 2 hours; then cool to room temperature to obtain the activated material;
[0032] Step (4): Add the activated material obtained in step (3) into a 3M hydrochloric acid solution, heat and reflux at 60°C and stir for 30 minutes; then wash wit...
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