Abstract
Following the investigations on iodine adsorption, we studied bromine adsorption using a bromine-potassium bromide aqueous solution. As bromine is much more volatile than iodine, it is difficult to determine bromine adsorption accurately. Because of high reactivity of bromine, however, we found a number of interresting phenomena, for example: (1) A great number of bromine molecules are reduced to bromine ions; (2) a considerable part of the bromine adsorbed can not be desorbed. Bromine adsorption, therefore, is not suitable for surface area determination, but for investigating the activity of the carbon black surface. Particularly, in the case of channel blacks containing high volatile matter, the behavior of bromine adsorption was quite different from that of iodine adsorption. From this experiment, we deduce that channel black is more active than furnace black.
