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http://dx.doi.org/10.5322/JES.2005.14.1.061

Adsorption Characteristics of Toluene Vapor in Fixed-bed Activated Carbon Column  

Lim Jin-Kwan (Division of Applied Chemical Engineering, Pukyong National University)
Lee Song-Woo (Division of Applied Chemical Engineering, Pukyong National University)
Kam Sang-Kyu (Division of Civil and Environmental Engineering, Cheju National University)
Lee Dong-Whan (Division of Material Science, Dongeui University)
Lee Min-Gyu (Division of Applied Chemical Engineering, Pukyong National University)
Publication Information
Journal of Environmental Science International / v.14, no.1, 2005 , pp. 61-69 More about this Journal
Abstract
Adsorption characteristics of toluene vapor, which is one of important source of volatile organic compounds (VOCs), by activated carbon were investigated using a fixed bed adsorption column. The operating parameters such as breakthrough curve, adsorption capacity, mass transfer zone (MTZ), and length of unused bed (LUB) were studied. The experimental results showed that the breakthrough time decreased with increasing inlet toluene concentration and gas flow rate. MTZ and LUB increased with the increase of inlet concentration, gas flow rate, and particle size of activated carbon. The adsorption capacity increased with the increase of inlet toluene concentration, while it decreased with increasing particle size. However, it was kept at constant value regardless of the increase of gas flow rate. Adsorption isotherm of toluene vapor could be represented by the Freundlich adsorption equation fairly well. From the adsorption experiments using some VOC gases such as toluene, xylene, butyl acetate. butanol and acetone, it was also found that the adsorption capacity was higher in the case of gas with higher boiling point and lower vapor pressure.
Keywords
Activated carbon; Adsorption; Toluene; Adsorption capacity; Mass transfer zone; Length of unused bed;
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