Method for preparing spherical active cardon with base of asphaltum riched in mesopores
A pitch-based, activated carbon technology, applied in tar pitch/petroleum pitch/natural pitch processing, chemical instruments and methods, petroleum industry, etc.
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Embodiment 1
[0006] The modified asphalt with a softening point of 105°C was used as raw material, and the asphalt with a softening point of 250°C was prepared by oxidation at 300°C. Add 15wt% naphthalene at 270°C and stir evenly. Cool the pitch to 180° C., add 2 wt % thermosetting phenolic resin 213 and 1 wt % polyvinyl alcohol as a dispersant, and stir evenly. Add 5wt% ball-forming pitch to 1% polyvinyl alcohol aqueous solution, slowly heat up to 200° C. under stirring, and then cool under stirring to obtain pitch original balls. Raise the temperature of asphalt balls to 300°C at a rate of 0.5°C / min in the air to obtain unmelted pitch balls. In a fluidized bed activation reactor, the unmelted pitch balls were heated up to 850 °C at a rate of 10 °C / min for carbonization, and at the same time, water vapor was activated to prepare pitch-based spherical activated carbon. The properties of pitch-based spherical activated carbon are shown in Table 1.
Embodiment 2
[0008] As in Example 1, prepare pitch with a softening point of 300° C., add 40 wt % dimethylnaphthalene at 270° C., and stir evenly. Cool the pitch to 180° C., add 18 wt % thermosetting phenolic resin 214 and 5 wt % dispersant carboxymethyl cellulose, and stir evenly. Add 40wt% ball pitch into 5% polyvinyl alcohol aqueous solution, slowly heat up to 180 DEG C under stirring state, and then cool under stirring state to prepare pitch original balls. Raise the temperature of asphalt balls to 300°C at a rate of 5°C / min in the air to obtain unmelted pitch balls. In a fluidized bed activation reactor, the unmelted pitch pellets were heated up to 1000°C at a rate of 10°C / min for carbonization, and at the same time activated by passing water vapor to prepare pitch-based spherical activated carbon. The properties of pitch-based spherical activated carbon are shown in Table 1.
Embodiment 3
[0010] According to the method of Example 1, asphalt with a softening point of 230° C. was prepared, and 30% dimethylnaphthalene was added at 200° C., and stirred evenly. Cool the pitch to 80° C., add 8 wt % thermosetting phenolic resin 213 and 3 wt % dispersant carboxymethyl cellulose, and stir evenly. Add 30wt% ball-forming pitch to 2% polyvinyl alcohol aqueous solution, slowly heat up to 100 DEG C under stirring state, then cool under stirring state to prepare pitch original balls. Raise the temperature of the original asphalt balls to 280°C at a rate of 3°C / min in the air to obtain unmelted asphalt balls. In a fluidized bed activation reactor, the unmelted pitch pellets were heated up to 900°C at a rate of 8°C / min for carbonization, and at the same time activated by passing water vapor to prepare pitch-based spherical activated carbon. The properties of pitch-based spherical activated carbon are shown in Table 1.
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