Modeling of chemical and physical processes in reactive porous bed

This paper contains the description of pyrolysis and flow process through porous media taking into account kinetic rate coefficient and equilibrium state of pyrolysis. Mathematical equation of pyrolysis mechanism including kinetic rate coefficient and equilibrium rate of pyrolysis, and equations like mass, momentum and energy and flow through porous zone are presented. Considered model is based on a simple geometry based on downdraft gasifier and analysed basing on CFD calculation of pyrolysis and flow of volatiles. Numerical analysis of a gas flow in an open system with mass source is carried out by means of Fluent. Calculations of the chemical and physical processes in porous bed are performed for different porosity