| The widespread adoption of coal-fueled advanced electric power generation systems depends upon the ability to remove H;In this study, reactor simulation models capable of describing the high temperature sulfidation and regeneration reactions of metal oxide sorbents in a fixed-bed reactor have been developed. The models consider the heterogeneous nature of the gas-solid reactions, the inherent unsteady state nature of the process, the fluid mechanics of flowing gas in the reactor, heat and mass transfer between gas and solid, heat lost to the surroundings, and the kinetics of the single pellets which comprise the bed. Only material balances are considered in the isothermal sulfidation model. Because the sorbent regeneration reaction is highly exothermic, both material and energy balances are included in the regeneration model. The unreacted core model is used to describe the noncatalytic gas-solid reactions in the individual pellets.;Experimental results are compared with those predicted by the models. During sulfidation, the H... |
