Transient multi gas-solid reactions in a bubbling fluidized bed

A "multimodel" for gas-solid reactions in a reacting particle has been appl ied to a bubbling fluidized bed reactor. The particle is tracked and bed an d particle variables are determined continuously. The conservation equation s of mass and heat with auxiliary relations are solved in an accelerating p article, which may rise or fall. The effects of bulk pressure, velocity and temperature, and particle diameter are studied. Heat and mass transfer coe fficients may fluctuate up to 75% and 148% respectively. Doubling the press ure changes h(c) by 75% and k(c) by -45%. Increase in pellet diameter reduc es both h(c) and k(c).