Supercritical water oxidation of Ion Exchange Resins in a stirred reactor: Numerical modelling

摘要: Supercritical water oxidation offers a viable alternative treatment to destroy the organic structure of Ion Exchange Resins. In order design and define appropriate dimensions for supercritical reactor, 2D simulation fluid dynamics heat transfer during process has been investigated. The solver used is commercial code, Fluent® 6.3. turbulent flow field in created by stirrer taken into account with k−ω model swirl imposed fluid. Particle trajectories are modelled Discrete Random Walk Model. For solubilization particles water, mechanism proposed implemented software through Eddy Dissipation Concept approach, taking identified rate determining species. Simulation results provide on flow, temperature fields localization inside reactor. reactive particles-supercritical model, effect parameters, such as feed rates or stirring velocity, can be focussed. Reaction predicted deviation lower than 15%. Degradation conversions good agreement experimental ones.