Adsorption equilibria of toluene, dichloromethane, and trichloroethylene onto activated carbon fiber

Adsorption equilibria of toluene, dichloromethane, and trichloroethylene onto the pitch-based activated carbon fiber were obtained by the static volumetric method. Equilibrium measurements were done at (298, 323, and 348) K and pressures up to 3 kPa for toluene, 12 kPa for dichloromethane, and 6 kPa for trichloroethylene, respectively. Among several isotherm models, the Toth equation agreed remarkably with the experiment data. For each adsorbate, characteristic and isosteric heat curves were derived from the equilibrium data. The isosteric heats of adsorption indicate that Nano-10 has an energetically heterogeneous surface.