Journal ArticleDOI
Gas exchange between the bubble and emulsion phases in gas-solid fluidized beds
Tadatoshi Chiba,H. Kobayashi +1 more
TLDR
In this article, the authors measured the extent of gas exchange between the bubble and emulsion phases in gas-solid fluidized beds using ozone as a tracer and found that the exchange coefficient values measured for single bubbles, as seen in this study, were found to be roughly one third of that obtained from freely bubbling fluidized bed, which fact was attributed to the coalescence of bubbles in the freely bubblebed.About:
This article is published in Chemical Engineering Science.The article was published on 1970-09-01. It has received 58 citations till now. The article focuses on the topics: Fluidized bed & Coalescence (physics).read more
Citations
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Book ChapterDOI
Transport Phenomena and Reaction in Fluidized Catalyst Beds
TL;DR: In this article, a simplified theory for a bubble column is applied to understand particle circulation in the fluidized catalytic beds, and it is possible to analyze flow patterns of bubbles and emulsion.
Journal ArticleDOI
Gas Dispersion and Bubble-to-Emulsion Phase Mass Exchange in a Gas-Solid Bubbling Fluidized Bed: A Computational and Experimental Study
TL;DR: In this paper, the authors used a two-fluid model based on the Kinetic Theory of Granular Flow (KTGF) to predict the dispersion of tracer gas using a single bubble rising through an incipiently fluidized bed, revealing that the assumptions often made in phenomenological models in the derivation of correlations for the mass transfer coefficient, mainly that the bubble diameter remains constant and that the tracer concentration is uniform in the bubble, are not valid.
Journal ArticleDOI
Interphase mass transfer in an aggregative fluidized bed
S.P. Sit,John R. Grace +1 more
TL;DR: The experimental technique developed by Chavarie and Grace has been used to measure interphase mass transfer rates for bubbles in a two-dimensional fluidized bed with different sizes of particles from 90 to 39O μm as discussed by the authors.
Journal ArticleDOI
Link between bubbling and segregation patterns in gas‐fluidized beds with continuous size distributions
Jia Wei Chew,Christine M. Hrenya +1 more
TL;DR: In this article, experiments involving a bubble-less gas-fluidized bed with Gaussian and lognormal particle-size distributions of Geldart Group B particles have been carried out, with a focus on bubble measurements.
Journal ArticleDOI
Drying granular solids in a fluidized bed
J.H.B.J. Hoebink,K. Rietema +1 more
TL;DR: In this paper, the authors presented a model which describes the mass transfer from the wet solids to a rising bubble for the case that there is no diffusion limitation inside the solids.
References
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Journal ArticleDOI
On the mathematics of fluidization Part 2. Steady motion of fully developed bubbles
TL;DR: In this paper, the momentum and mass conservation equations derived in part 1 are used in the limiting case of large solids-to-fluid density ratio in the presence of a fully developed bubble.
Journal ArticleDOI
Cloud formation around bubbles in gas fluidized beds
TL;DR: In this article, the shape and size of gas clouds as they form around bubbles in two-dimensional fluidized beds of spherical and irregular particles is described. And the behavior of clouds as their parent bubbles split and coalesce was described.
Journal ArticleDOI
Gas exchange between bubbles and dense phase in a fluidised bed
TL;DR: In this article, tracer-free air-flow at or slightly above the incipient fluidisation rate was used to produce a stream of bubbles containing tracer gas, which was injected continuously at a point near the distributor into fluidized beds, diameters 2 in. and 6 in.
Journal ArticleDOI
Reaction kinetics in fluidized beds
L. Massimilla,H.F. Johnstone +1 more
TL;DR: In this paper, the results obtained when using baffled beds show that the baffles improve the conversion from 10 per cent to 40 per cent over that obtained in non-baffled fluidized reactors.
Related Papers (5)
Effect of bubble interaction on interphase mass transfer in gas fluidized beds
S.P. Sit,John R. Grace +1 more