Heat and mass transfer to/from active particles in a fluidized bed - An analysis of the Baskakov-Palchonok correlation
Journal article, 2021

Heat and mass transfer to or from single active particles surrounded by inert (passive) particles in a fluidized bed has been investigated based on published correlations. Special emphasis is on the application of a proposal by Baskakov, further developed by Palchonok. This representation describes heat and mass transfer as a function of the size ratio of inert to active particles. Two limits have been chosen: the limit of small active particles, where the active and the inert particles are equal, and the limit of large active particles, where the influence of the size of the active particle has vanished. The presentation aims at finding a suitable relationship, describing the size ratio of inert to active particles on heat and mass transfer to/from particles in fluidized beds and to critically evaluate its usefulness. It seems that the agreement between available correlations is qualitative and only approximate estimations can be made. A generalized scheme for calculations is presented. The formulation is made for bubbling fluidization. A discussion is presented on its use in circulating fluidized bed applications for fuel conversion as well.

Active particles

Fluidized bed

Heat transfer

Mass transfer

Correlation

Particles

Author

Bo G Leckner

Chalmers, Space, Earth and Environment, Energy Technology

International Journal of Heat and Mass Transfer

0017-9310 (ISSN)

Vol. 168 120860

Svenskt deltagande i IEAs samarbete om omvandling i fluidiserad bädd

Swedish Energy Agency, 2015-04-20 -- 2018-04-30.

Subject Categories

Subatomic Physics

Energy Engineering

Meteorology and Atmospheric Sciences

DOI

10.1016/j.ijheatmasstransfer.2020.120860

More information

Latest update

1/20/2021