The effect of the pore structure of polymeric resins on their adsorption kinetics was explored and Dual Resistance Model for predicting absorption kinetics of multiple components was established. The adsorption kinetics of individual toluene, cyclohexane and n-pentane as well as their dual or triple combinations on two polymeric resins were studied by the differential adsorption bed (DAB) method. Dual Resistance Model, which is a combination of barrier resistance at the micropore mouth and pore interior resistance, was effective for the fitting of adsorption kinetic data of single component, indicating that the adsorption diffusion resistance existed at the micropore mouth and the mircopore interior simultaneously. The adsorption kinetic curves of binary and ternary component VOCs on two resins can be predicted effectively by using the Dual Resistance Model as well as the extended Langmuir multi-component adsorption equilibrium equation. The average error between model prediction and experimental data were less than 17%. The competitive adsorption between the different components on the microporous resin was more significant than that on the macroporous resin and adsorption affinity of three VOCs on two resins had the following order:toluene > cyclohexane > pentane.
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YANG Xin-yu, SHI Qiu-yi, LONG Chao. Adsorption kinetics and prediction of multicomponent VOCs on polymeric resins. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(5): 1830-1837.
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