Potential commercial uses of pyrolytic carbon black
This paper studies the characterization and potential commercial uses of pyrolytic carbon black obtained in an industrial scale waste tire recycling process. Pyrolytic carbon black was produced using a rotary kiln oven with a daily batch capacity of 5 metric tons and potential commercial uses were evaluated. The pyrolysis was performed in an inert atmosphere in a temperature range from 400°C to 500°C for about 8 hours. Inorganic content was about 12 percent (primarily zinc oxide) and sulfur content was about 3 percent.
Based upon analysis of particle size and scanning electronic microscopy (SEM) images, about 40 percent of the material has a small particle size with properties very close to those of commercial carbon black grades being used as a filler in polymers and as paint pigment. Characterization was made using granulometric analysis, oil absorption number, thermogravimetric analysis, pH analysis, density analysis, calorific value, SEM, X-ray fluorescence and BET surface area.
The material presents properties very close to those of commercial semi-reinforcing materials. Further treatments are proposed to improve material properties.
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