Adsorption and Desorption of Bromine by Graphites

Abstract

Isothermal adsorption and desorption of bromine by graphites and other carbonaceous compounds have been studied at 30°C or 80°C. The results were as follows: i. Quantity of bromine adsorbed decreases with charcoal, graphite, soot and pitch coke in order. With graphites, adsorptive capacity of natural graphite exceeds that of artificial graphite. ii. Effect of grain surface area upon quantity of adsorption is small with charcoal and graphite. iii. Plotting the adsorption process curve on a full logarithmic section paper, it is found to be inflected with graphite and to be straight with the other kinds. The positions of in flexion and the inclinations of the inflected lines are characteristic with graphites. iv. It is assumed that the point of inflexion and the inclination may be related to degree of graphitizing.