Preparation method of hemp stalk activated carbon
A technology of hemp stalks and activated carbon, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of affecting the adsorption capacity of heavy metal ions, low utilization rate of hemp stalks, wasting the environment, etc., and achieve good activation effect, Achieve the effect of resource utilization and less consumption
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Embodiment 1
[0021] The preparation method of hemp stalk activated carbon of the present invention comprises the following steps:
[0022] (1) Cut, wash and dry the waste hemp stalks.
[0023] (2) Under the protection of nitrogen atmosphere, heat the washed hemp stems to 500°C at a heating rate of 10°C / min and keep them warm for 2 hours. During the heat preservation process, keep nitrogen flow and circulation, and the speed of nitrogen circulation is 0.3m 3 / s, and then lower the temperature to normal temperature at 3°C / min to obtain hemp stalk charcoal, and grind the particles to below 300 mesh.
[0024] (3) Mix the two according to the mass ratio of cannabis stalk charcoal granular carbon and tetramethylammonium hydroxide at a ratio of 1:1, heat and stir on a magnetic stirrer at 135°C for 1 hour, and perform pretreatment to obtain pretreated hemp stalk charcoal .
[0025] (4) Mix the hemp stalk charcoal to be treated with sodium ethoxide at a mass ratio of 1:1, add water at a mass rati...
Embodiment 2
[0031] The preparation method of hemp stalk activated carbon of the present invention comprises the following steps:
[0032] (1) Cut, wash and dry the waste hemp stalks.
[0033] (2) Under the protection of nitrogen atmosphere, heat the washed hemp stems to 500°C at a heating rate of 10°C / min and keep them warm for 2 hours. During the heat preservation process, keep nitrogen flow and circulation, and the speed of nitrogen circulation is 0.3m 3 / s, and then lower the temperature to normal temperature at 3°C / min to obtain hemp stalk charcoal, and grind the particles to below 300 mesh.
[0034] (3) Mix the hemp stalk charcoal granular carbon and tetramethylammonium hydroxide at a mass ratio of 2:1, heat and stir at 140°C on a magnetic stirrer for 1 hour, and perform pretreatment to obtain pretreated hemp stalk charcoal .
[0035] (4) Mix the hemp stalk charcoal to be treated with sodium ethylate at a mass ratio of 2:1, add water at a mass ratio of 1:2 between the mixture and w...
Embodiment 3
[0041] The preparation method of hemp stalk activated carbon of the present invention comprises the following steps:
[0042] (1) Cut, wash and dry the waste hemp stalks.
[0043] (2) Under the protection of nitrogen atmosphere, heat the washed hemp stems to 500°C at a heating rate of 10°C / min and keep them warm for 2 hours. During the heat preservation process, keep nitrogen flow and circulation, and the speed of nitrogen circulation is 0.3m 3 / s, and then lower the temperature to normal temperature at 3°C / min to obtain hemp stalk charcoal, and grind the particles to below 300 mesh.
[0044](3) Mix the hemp stalk charcoal granular carbon and tetramethylammonium hydroxide at a mass ratio of 3:1, heat and stir on a magnetic stirrer at 140°C for 2 hours, and perform pretreatment to obtain pretreated hemp stalk charcoal .
[0045] (4) Mix the hemp stalk charcoal to be treated with sodium ethoxide at a mass ratio of 3:1, add water according to the mass ratio of the mixture to wa...
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