TY  - CONF
N2  - Tapered beds can handle fluidization of particles with wide size distribution more effectively. As the area of cross-section increases with height, higher gas velocity at the gas distributor reduces the chances of de-fluidization of larger particles while lower gas velocities at the top ensure less elutriation of fines. Tapered beds can be useful for processes such as combustion of coal, roasting of ores, polymerization, granulation of fines, drying of wet powders in which particle size may change with time. In all these processes gas to particle mass transfer plays a vital role. Mass transfer rates from naphthalene balls to fluidizing air in tapered beds of inert materials are measured and mass transfer coefficients are estimated. Effect of size and density of the mass transferring particle with respect to properties of bed particles is investigated. A model based correlation is developed to explain the observations.
AV  - none
CY  - Nashville, TN
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-77951672372&partnerID=40&md5=fac0468a9049be2f3bb92f01bd297be6
Y1  - 2009///
A1  - Subbarao, D.
A1  - Das, M.L.
ID  - scholars578
TI  - Mass transfer in tapered fluidized beds
KW  - Bed particles; Combustion of coal; Gas distributor; Gas velocity; Inert materials; Mass transfer coefficient; Mass transfer rate; Model-based; Particle mass; Tapered bed; Tapered fluidized bed; Tapered fluidized beds; Transferring particle; Wet powder; Wide size distribution
KW  -  Calcination; Coal combustion; Fluid dynamics; Fluidization; Fluidized bed combustion; Mass transfer; Naphthalene; Particles (particulate matter)
KW  -  Fluidized beds
N1  - cited By 0; Conference of 2009 AIChE Annual Meeting, 09AIChE ; Conference Date: 8 November 2009 Through 13 November 2009; Conference Code:79788
ER  -