A NOVEL METHOD FOR DETERMINATION OF CHOKING VELOCITIES

A novel dynamic method is presented which allows both the type A and t he type C choking velocities to be determined sequentially in a single experiment, with ease of operation and considerable experimental econ omy. Initial results have shown that the type A choking velocity, U-cA , and type C choking velocity, U-cC, are consistent with earlier measu rements using conventional techniques. The average solids holdups corr esponding to choking conditions for the FCC particles are about 0.04 f or type A choking and 0.25 for type C choking, again in good agreement with available results from the literature. (C) 1998 Elsevier Science S.A. All rights reserved.