Abstract
Gas-phase adsorption and desorption of volatile organic compounds (VOCs) by granular activated carbon (GAC) and activated carbon fibres (ACFs) is investigated. Acetone, isopropyl alcohol (IPA) and tetrahydrofuran (THF) were employed as model VOCs for this study. Experimental results indicated that adsorption of VOCs by GAC and ACF is influenced by the BET surface area of adsorbent and the molecular weight and polarity of the adsorbate. It was also observed in those results that the exhausted GAC and ACF can be effectively regenerated at 150°C with over 98% desorption efficiency of adsorbed impurity or solvent. In terms of the total amount of VOCs adsorbed, the time to reach equilibrium adsorption and the time for complete desorption, ACFs outperform GAC by a significant margin.
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