Preparing method of pitch-based spherical activated carbon with high heat conductivity
A high thermal conductivity, pitch-based technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems that are not suitable for the preparation of pitch-based spherical activated carbon, etc., to achieve lower final temperature, high gloss, and faster reaction speed effect
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Embodiment 1
[0027] After uniformly mixing 290°C softening point pitch, naphthalene, 200 mesh graphite powder and 400 mesh mesophase pitch powder (mass ratio: 1:1) with a mass ratio of 1:0.25:0.05, react at 350°C for 5 hours to obtain Modified asphalt: The modified asphalt is crushed and screened to obtain 0.5mm asphalt particles, and then added to an aqueous solution containing 5wt% polyvinyl alcohol, wherein the mass of polyvinyl alcohol is 10% of the asphalt, and stirred at 150°C 1h, obtain asphalt ball; The obtained asphalt ball contains 3% (volume ratio) SO 2 In the air, according to the heating rate of 2 °C / min, it was raised to 180 °C and reacted for 5 hours to obtain oxidized asphalt balls, and the air was switched to N 2 Afterwards, the temperature was raised from room temperature to 1000°C at a heating rate of 20°C / min and stayed for 0.1h, and then switched to steam activation for 0.5h to obtain pitch activated carbon spheres. Put the asphalt activated carbon balls and urea into...
Embodiment 2
[0029] Mix 260°C softening point asphalt, naphthalene, and graphite worms at a mass ratio of 1:0.35:0.01, and react at 300°C for 3 hours to obtain modified asphalt; the modified asphalt is crushed and screened to obtain 0.1mm asphalt particles, and then Add it into an aqueous solution containing 1wt% polyvinyl alcohol, wherein the mass of polyvinyl alcohol is 5% of the asphalt, and stir at 85°C for 3 hours to obtain asphalt balls; The heating rate of 5°C / min was increased to 280°C for 2 hours to obtain oxidized pitch pellets. After switching the air to N2, the temperature was raised from room temperature to 800°C at a heating rate of 8°C / min for 1 hour, and then switched to steam activation for 3 hours. Get Pitch Activated Carbon Balls. Put pitch activated carbon balls and ammonium bicarbonate into the autoclave at a mass ratio of 1:0.3, heat it up to 300°C at a rate of 10°C / min after sealing, keep the temperature constant for 0.5h, and then cool down to obtain the product. T...
Embodiment 3
[0031] Mix 300°C softening point pitch, naphthalene, and 5mm mesophase pitch carbon fibers with a mass ratio of 1:0.4:0.05, and then react at 280°C for 5 hours to obtain modified pitch; the modified pitch is crushed and screened to obtain 0.8mm pitch granules, and then added to an aqueous solution containing 4wt% polyvinyl alcohol, wherein the mass of polyvinyl alcohol is 8% of the asphalt, and stirred at 90°C for 2 hours to obtain asphalt balls; In the air, the temperature was raised to 200°C at a heating rate of 3°C / min and reacted for 1 hour to obtain oxidized asphalt balls. After switching the air to N2, the temperature was raised from room temperature to 850°C at a heating rate of 12°C / min and stayed for 0.5h, and then switched to CO2 Activated for 5 hours to obtain asphalt activated carbon balls. Put pitch activated carbon balls and ammonium carbonate into the autoclave at a mass ratio of 1:0.2, heat it up to 250°C at a rate of 5°C / min after sealing, keep the temperature...
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