Modeling of multi gas—solid reactions: A transient model

A rigorous multicomponent multi gas‐solid reaction model is developed. It is based on the particle — pellet model and considers the transient nature of the system, inter‐ and intra‐particle heat and mass transfer and the variation of structural parameters with reaction. The model equations describing the structural changes along with property evaluation schemes are formulated for a general multicomponent system. Simulation results are compared with experimental data for carbon gasification and the reduction of a nickel oxide/hematite mixture. The match between model and experiment was found satisfactory. Both concentration and temperature profiles and other parameters are examined.