Deactivation model for the adsorption of trichloroethylene vapor on an activated carbon bed

In this work, the adsorption of trichloroethylene (TCE) vapor was investiga ted in a laboratory-scale packed-bed adsorber by using granular activated c arbon (GAC) at constant pressure (101.3 kPa). The packed-bed adsorber (PBA) was operated batchwise with the charges of GAC particles in the ranges of 2.5-10.0 g for obtaining TCE breakthrough curves. Experiments were carried out at different temperatures (25.6 less than or equal to T (degrees C) < 3 5.8) and TCE feedstock. concentrations (6350 less than or equal to C (ppm T CE) less than or equal to 7950) within the range of space velocity (5 000 l ess than or equal to I (h(-1)) less than or equal to 17 000). The effects o f TCE inlet concentration, operating temperature, and mass of adsorbent (m( Ads)) on the TCE breakthrough curves were investigated, respectively. The d eactivation model (DM) was tested for these curves by using the analogy bet ween the adsorption of TCE and the deactivation of catalyst particles. Obse rved adsorption rate constants (k(s)) and first-order deactivation rate con stants (k(d)) were obtained from the model. It was found that the deactivat ion model describes the experimental breakthrough curves more accurately co mpared to the adsorption isotherms given in the literature.