Gas residence-time characteristics in a high-velocity circulating fluidised bed of FCC catalyst

Computation of gas and solid dispersion coefficients in turbulent risers and bubbling beds

“…1 10 0 1 2 3 4 5 6 7 8 9 10 Axial Gas Dispersion Coefficient (m 2 /s) Dry, 1989Kim, 1998Wei, 2001 CFD-Riser-FCC particles Li , 1989 4 m. (Dry and White, 1989;Namkung, 1998, 1999;Li and Weinstein, 1989;Wei et al, 2001). Fig. 14.…”

Computation of turbulence and dispersion of cork in the NETL riser

“…15. A comparison of computed to measured dispersion coefficients for two gas velocities at the solids flux of 10.37 kg/m 2 s. Dry, 1989Kim, 1998& 1999Li, 1989Wei, 2001 0 (Dry and White, 1989;Namkung, 1998, 1999;Li and Weinstein, 1989;Wei et al, 2001). Adanez, 1997Leckner, 2002Werther, 1992Rhodes,1993Wei, 2001 (Leckner et al, 2000(Leckner et al, , 2002Werther et al, 1992;Wei et al, 2001;Rhodes et al, 1993;Adanez et al, 1997).…”

Situating the high‐density circulating fluidized bed

“…In view of 1 , there is reduced segregation of particles Ž . by size Karri and Knowlton, 1998 , and a closer approach to Ž plug flow of both gas and solids van Zoonen, 1962;Dry and White, 1989;Contractor et al, 1994;Derouin et al, 1997;Liu . et al, 1999 . 4.…”