LINEAR DRIVING-FORCE APPROXIMATION IN CYCLIC ADSORPTION PROCESSES - SIMPLE RESULTS FROM SYSTEM DYNAMICS BASED ON FREQUENCY-RESPONSE ANALYSIS

The linear driving force (LDF) approximation for cyclic adsorptive pro cesses is discussed on the basis of model equivalence with the homogen eous diffusion model (HDM), the pore diffusion model (PDM) and the int raparticle diffusion and convection model (IDCM). Model equivalence is based on the frequency response of the adsorbent particle, namely on the equality of the amplitude ratio and the phase-lag functions. The a nalysis of the continuous stirred tank adsorber (CSTA) and of the plug flow adsorber (PFA) is addressed. (C) 1998 Elsevier Science S.A. All rights reserved.