TEMPERATURE-VACUUM PROCESS FOR THE DESORPTION OF ACTIVATED-CHARCOAL

This paper describes the results, and the mass and heat balances, of a process for the desorption of activated charcoal. Desorption was performed under vacuum, through direct electrical heating. The activated charcoal carried a charge of chlorinated hydrocarbons and water produced by cleaning of waste air during soil reconditioning, or, under laboratory conditions, of tetrachloroethylene. In addition, the temperature distribution in the activated charcoal bed during desorption was investigated. The temperature was measured at 16 points of the bed using specially manufactured bar-type thermocouples. The results are given in tables and figures.