MICROSCOPIC MODELING OF ELECTROTHERMAL DESORPTION

A mathematical model of thermal desorption with internal electroresistive heating of the adsorbent is postulated for a single particle. Three parallel mechanisms are considered: surface diffusion, pore diffusion and thermal diffusion. The resulting system of partial differential equations is solved numerically using orthogonal collocation. Using the model, computer simulation is performed and the influence of different model parameters investigated. The advantage of desorption with internal sorbent heating (such as electrothermal desorption) is proved.