The hydrodynamic and gas mixing characteristics have been determined in a FCC regenerator (0.48 m I.D.×3.4 m high) with FCC particles. Solids holdup in the dense bed decreases with increasing gas velocity, but it increases in the freeboard region. The bubble/void fraction increases with an increase along the bed height at a given gas velocity and increases with increasing gas velocity at a constant bed height. Backmixed tracer gas at the wall region is higher than that at the center region of the bed. The gas backmixing coefficient decreases with increasing gas velocity.
Kim SW, Namkung W, Kim SD, "Bubble/void Properties in a FCC Regenerator," Proc. 6th Asian Conf. on Fluidized-bed and Three-phase Reactors, eds. by H.S. Chun and S.D. Kim, Cheju, Korea, 43, 1998
Senior RC, Avidan AA, "Comparison of the Performance of Circulating and Turbulent Bed FCC REgenerators," Proc. of 5th Int. Conf. on Circulating Fluidized Bed, Beijing, China, 1996
Wilson JW, "Fluid Catalytic Cracking-Technology and Operation," Penn Well Publishing Company, Oklahoma, U.S.A., 1997