Handbook of Solvents - George Wypych - ChemTech - Ventech!

22.1 Absorptive solvent recovery 1525
Figure 22.1.10. Idealized toluene adsorption isotherms.
Figure 22.1.11. Adsorption isotherm of five typical solvents (After reference 13).
From the viewpoint of adsorption technology, high toluene concentration in the exhaust
air is more economic than a low concentration. But to ensure safe operation, the toluene
concentration should not exceed 40% of the lower explosive limit. There is, however,
an optimum activated carbon type for each toluene concentration (Figure 21.1.10).
The pore structure of the activated carbon must be matched to the solvent and the solvent
concentration for each waste air cleaning problem. Figure 22.1.11 shows Freundlich