MASS-TRANSFER AND REACTION BEHAVIOR OF A CIRCULATING FLUIDIZED-BED REACTOR

This contribution presents a chemical reactor model of a circulating f luidized bed (CFB) which takes into account adsorption effects and pro vides a description of the vertical profiles of gas concentration in t he riser. The oxidation of NO is used as an example of a heterogeneous catalytic reaction. Mass transfer between the gas phase and solid par ticles in the CFB was investigated at various temperatures and solids mass flow rates. The measurements show that the mass transfer coeffici ent decreases with increasing solids mass flux and that the CFB resemb les a bubbling fluidized bed as regards gas-solid contacting.