Abstract
The manner of preparation of BAC determines its capacity for reaction with ethylene, in the following order: slow isothermal bromination > rapid bromination > rapid bromination followed by heating at 550°C. The latter method produces unreactive BAC. It is conluded that heat supplies the activation energy for chemisorption of the bromine, and that the chemisorbed bromine is unreactive. The ability of BAC to retain its bromine was found to be related to the pore structure of the carbon. At saturation pressure, capillary condensation of the bromine occurs. Carbons with larger pore diameters desorb their bromine more rapidly and to a greater extent than do carbons with smaller pore diameters. Recommendations for applications to air purification are suggested.
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