Hierarchical pore activated carbon controllable preparation method and application
A technology of activated carbon and graded pores, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of sacrificing specific surface area, poor performance, low catalytic efficiency of activated carbon, etc., and achieve the effect of high specific surface area
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[0026] In one or some embodiments of the present disclosure, a controllable preparation method of hierarchical pore activated carbon is provided, comprising the following steps:
[0027] Dry the carbon material after preliminary treatment, place the dried carbon material in deionized water, put it in a hydrothermal reaction kettle for heating, and perform post-treatment after the hydrothermal reaction kettle is cooled down.
[0028] The post-treatment includes: cleaning the surface of the material with deionized water and absolute ethanol, and drying it to obtain a carbonized precursor of hydrothermal carbonization; heating and activating the carbonized precursor sample. Activation under water vapor mixed gas and water vapor atmosphere;
[0029] The method of regulating the pore size of activated carbon includes: increasing the hydrothermal reaction temperature within a certain range to increase the proportion of medium and large pores; otherwise, reducing the proportion of me...
Embodiment 1
[0051] Such as figure 1 As shown, this embodiment provides a controllable preparation method of hierarchical pore activated carbon, comprising the following steps:
[0052] 1) Carry out work such as crushing, screening and deionized water washing of carbon materials in carbon material processing equipment 1, wherein carbon materials include but not limited to: coal-based carbon materials, biomass carbon materials (such as coconut shells, walnut shells, garlic leather), organic polymer carbon materials, etc., and the particle size is 10-100 mesh screened out with a porous sieve.
[0053] 2) After the preliminary treatment is completed, it is placed in the drying equipment 2 for drying, and the temperature of the drying equipment 2 is set at 101-150°C.
[0054] 3) Put the dried carbon material and an appropriate amount of deionized water into the hydrothermal reaction kettle 4 together, seal the hydrothermal reaction kettle 4 completely and place it in the hydrothermal reaction...
Embodiment 2
[0060] This embodiment provides a controllable preparation method of hierarchical pore activated carbon, which is different from Example 1 in that:
[0061] On the basis of the preparation method in Example 1, increasing the hydrothermal carbonization temperature within the temperature range of 100-400°C can increase the proportion of medium and large pores, and has little effect on the specific surface area of activated carbon; otherwise, the hydrothermal carbonization can be reduced within a certain range Temperature can increase the proportion of mesopores. As shown in Table 2, the activated carbon parameters are prepared at 100°C and 400°C respectively. It can be seen from the table that changing the hydrothermal reaction temperature can change the pore volume, but the specific surface area has a greater impact.
[0062] Table 2
[0063]
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