Modelling the Desorption of Ethanol from an Externally Heated Saturated Activated Carbon Column by Purging with Air

Abstract

ABSTRACT:The desorption of ethanol from an externally heated column loaded with activated carbon and purged with air has been studied. The column was initially saturated with liquid ethanol. This process simulates the regeneration step in a concentration-swing/thermal-swing adsorption process for the production of fuel-grade ethanol. A theoretical model was developed for describing the mass-and heat-transfer kinetics of the process. Validation of the model was achieved by comparing its predictions with experimental data, employing initial column temperatures between 298 K and 395 K and air flow rates between 1.6 × 10 -6 m 3

Air Regeneration of a Silicalite Column Loaded with Ethanol: Modelling and Energy Estimation

“…The evolution of the ethanol mass retained in the column (m) and the column temperature at 9 cm from the inlet of the bed (z/L = 0.9) are recorded with time. The experimental setup and the methodology used have been described elsewhere (Delgado et al 2010).…”

Continuous Phenol Removal Using a Liquid–Solid Circulating Fluidized Bed

“…As shown in Figure 3, the regeneration of the phenol-adsorbed activated-carbon glass beads using a 5% (v/v) ethanol solution was performed by assessing the desorption potential of the phenol from the activated-carbon-coated glass beads in presence of an ethanol medium [27]. From the obtained results, it was clear that using a 5% (v/v) ethanol solution resulted in a 56% phenol desorption efficiency for the activated-carbon-coated glass beads for a regeneration period of 2 h. Hence, the viable option while working with the downcomer of the LSCFB would be increasing the concentration of the ethanol solution that can bring about a satisfactory desorption or removal of phenol from the beads within a lesser amount of time.…”