Abstract
The effects of the reaction vessel pressure on the BET surface area, pore volume and pore size of the synthesis of sliced activated carbons (SAC) at 850 degrees C starting from 0.10 to 0.40 bar were investigated. Other synthetic variables like dwell time, CO2 flow rate and heating ramp rate were kept constant during the whole study. Methodology involves a single step procedure using the mixture of gases (N-2 and CO2). During activation of flow rate, the both gases are kept at 150 and 50 ml/min, respectively. The BET surface areas of the SAC prepared at 0.10, 0.15, 0.20, 0.25, 0.30, 0.35 and 0.40 bar after 30 min of activation time were 666, 745, 895, 1094, 835, 658 and 625 m(2)/g, respectively. Scanning electron microscopy (SEM) for surface morphology, energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM) for nano particle size were also carried out, which confirmeds the same trend.