SYNTHESIS OF LOW-ASH CARBON PELLETS FROM CARBON BLACK AND PETROLEUM PITCH BY STEAM ACTIVATION

Abstract

Carbon pellets prepared by mixing carbon black and petroleum pitch, molding and carbonization were undergone steam activation at 850 °C. Carbons produced to different degrees of burn off (4.2 – 89.6 wt %) were characterized using gas (benzene) and liquid phase (iodine number) adsorption. The results showed that increasing of the activation degree leads to the increase of specific surface area from 44 to 570 m 2 /g, total pore volume from 0.65 to 1.7 cm 3 /g; conversely compressive strength is decreasing from 2.0 to 0.5 MPa. This carbon material has low ash content (less than 1 wt%) and can therefore be used as an adsorbent in food industry and medicine. Therefore, the aim of this work is to obtain samples of activated carbon granules of carbon and petroleum pitch and study their properties. As a result of activation were obtained eight samples of carbon granules, in which the value of intoxication was linearly dependent on the time of activation and varied in the range of 4.2 - 89.6% by weight. Among the main characteristics of the obtained samples of greatest interest are the adsorption properties which should increase as the increase in the amount of ablation granules.