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 transien t nature of the system, inter- and intra-particle heat and mass transf er and the variation of structural parameters with reaction. The model equations describing the structural changes along with property evalu ation schemes are formulated for a general multicomponent system. Simu lation results are compared with experimenter data for carbon gasifica tion and the reduction of a nickel oxide / hematite mixture. The match between model and experiment was found satisfactory. Both concentrati on and temperature profiles and other parameters are examined.