Airborne Toluene Removal by Dynamic Adsorption on Fiber- and Granular-Activated Carbon

The selection of adsorbents is critical for developing an adsorption unit. In this study, a activated carbon fibers (ACF) and a granular-activated carbon (GAC) were evaluated in dynamic toluene adsorption to determine their benefits and limitations. A variety of physicochemical approaches were used to characterize the samples. Adsorption under varied circumstances demonstrated that ACF has a larger adsorption capacity and a longer saturation time than GAC. The Langmuir isotherm suited equilibrium data well. Thermodynamic characteristics showed that adsorption was spontaneous and exothermic. The adsorption kinetics were found to be dominated by the pseudo-first-order model, with GAC having a greater sorption rate. Thermal regeneration appeared to be more favorable for ACF. A granular-activated carbon and a fiber-activated carbon had been compared in the adsorption of gas phase toluene, a common pollutant. Experimental approaches including physical characterization, dynamic adsorption, and thermal regeneration had been carried out. The fiber form had demonstrated higher capacity, longer retention time and better thermal regenerability. image