Non-isothermal adsorption kinetics of water vapour into a consolidated zeolite layer

摘要: Abstract A one-dimensional model for the kinetics of water vapour adsorption into a consolidated zeolite layer is presented. The combined heat and mass transfer problem modelled simulated using software packet gPROMS® (general PROcess Modelling System). centered finite difference method approximation employed in solving obtained set partial differential, ordinary differential algebraic equations. Mass described by micro-pore diffusion, while terms conduction. temperature dependence diffusion coefficient defined an Arrhenius relationship, whereas concentration accounted Darken factor. validity developed has been checked against experimental study, which investigated constant volume-variable pressure test rig. starting changed range 10–30 mbar, wall adjusted to 35 50 °C. measured characteristic half time varies between 13 21 s, required reach 90% equilibrium loading lies 70 94 s depending on boundary condition. These times are quite short promise highly compacted pump appliances. Fitting results investigations numerical simulation gives (D∞) 1.58 × 10 - 4 (m2 s−1) activation energy 32.41 (kJ mol−1). Furthermore, measuring cell (αW) 230 (W m−2 K−1) estimated.