ONE-DIMENSIONAL, NONADIABATIC, MICROSCOPIC MODEL OF ELECTROTHERMAL DESORPTION PROCESS DYNAMICS

A new thermal desorption process in which the heat for desorption is g enerated inside the adsorbent particles by passing an electric current through them (Joule's heat), called electrothermal desorption, is mod elled on a column scale. A one-dimensional, non-adiabatic, microscopic model describing the process dynamics is presented. The model was obt ained as a set of nonlinear partial differential equations with three independent variables (time, column axial coordinate and particle radi al coordinate), which was solved using the double orthogonal collocati on,method, On the basis of this model, time and space concentration an d temperature profiles were simulated. The influence of different proc ess parameters was investigated, and the advantage of desorption with internal sorbent heating was proven.