Gasification of waste

The kinetic reaction terms were introduced into the right-hand side of the continuity equations as the result of work on the gasification of waste.

The medium includes several solid phases, some of which are the seat of heterogeneous reactions (pyrolysis, combustion, and gasification), a single-component liquid phase and a gas phase with 15 chemically-reactive elements. In this phase, the reactions are homogeneous and kinetically controlled. The choice fell on a global homogenization of the bed.

The transition to simulation, intentionally two-dimensional in this case, required eliminating a number of numerical difficulties related to the specificities of the problem: industrial dimensions, large number of coupled PDEs, highly reactive terms locally associated with high temperatures.