ADSORPTION OF ORGANIC-SUBSTANCES WITH DIFFERENT PHYSICOCHEMICAL PROPERTIES .2. THE HEATS OF ADSORPTION OF FREON 13B1 ON ACTIVE CARBONS

The linear regions of the adsorption isotherms of freon 13B1 (CF3Br) o n active carbons with different porous structures were studied by gas chromatography at 343-573 K. The Henry's constants were determined, an d the isosteric heats of adsorption (Q) were calculated in the region of zero filling. It was established that the Q values for active carbo ns with different pore size distributions are almost the same and vary within 38-41 kJ mol(-1). This coincidence can be explained assuming t hat the interaction between the adsorbed molecules and the active carb ons occurs in the pores whose sizes are comparable with those of the a dsorbed molecules.