Adsorption of n-hexane vapors onto non-functionalized hypercrosslinked polymers (hypersol-macronettm) and activated carbon: equilibrium studies

Adela Marilena Buburuzan Haleta, Cezar Catrinescu, Matei Macoveanu

Gheorghe Asachi Technical University of Iasi, Faculty of Chemical Engineering and Environmental Protection, Department of Environmental Engineering and Management, 71 Mangeron Blvd., 700050 Iasi, Romania


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 C, 40 C and 50 C. 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.


VOCs; hexane; adsorption; activated carbon; hypercrosslinked polymeric resins; isotherm

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