Abstract

Two non-functionalized hypercrosslinked polymeric resins type Macronet (MN 202 and MN 250) were employed to remove nhexane vapors from gas phase. A comparison of the equilibrium behavior of these hypercrosslinked resins and a bituminous granular activated carbon was made. The initial n-hexane concentration in the air stream ranged from 2100 to 4500 ppm and the adsorption temperatures were 30^oC, 40^oC and 50^oC. The results showed that the MN 250 presents the higher adsorption capacities of n-hexane, in all studied conditions. The experimental results were fitted to the Freundlich, Langmuir and Dubinin-Raduchkevich equation isotherms, to obtain the characteristic constants of each model. The maximum adsorption capacity for nhexane, determined by using these model isotherms, decreased in the following order: MN 250 > MN 202 >= AC 20.