Results 171 to 180 of about 420,890 (228)

The behaviour of a continuously bubbling fluidised bed

Chemical Engineering Science, 1966
Abstract This paper considers two aspects of the behaviour of a bubbling fluidised bed, namely (a) How is the rising velocity of a bubble in a cloud of bubbles related to the velocity of the same bubble in complete isolation? This is important in the consideration of the expansion of a bed of particles due to bubbles rising through it.
J.F. Davidson, D. Harrison
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Bubble velocities and bed expansions in freely bubbling fluidised beds

Chemical Engineering Science, 1969
Abstract Measurements of bubble velocities in freely bubbling beds have shown that the velocities of individual bubbles are influenced more markedly by the disposition of surrounding bubbles than by the size of the individual bubble itself. Bubbles present in high concentration rise at much greater velocities than isolated bubbles of the same volume.
K. Godard, J.F. Richardson
openaire   +1 more source

Characteristics of fluidisation behaviour in a pressurised bubbling fluidised bed

The Canadian Journal of Chemical Engineering, 2012
AbstractThe experiments were carried out in a bench‐scale fluidised bed of 90 mm in diameter to determine the influence of pressure on fluidisation characteristics of Geldart A and B particles over the range of pressure 0.1–4.5 MPa. For Geldart B particles, the results indicate that minimum fluidisation velocity (umf) was found to decrease with ...
Haoyu Li, Weiping Yan, Wei Wu, Chunbo Wang   +3 more
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Combustion behaviour of rice husk in a bubbling fluidised bed

Biomass and Bioenergy, 2002
The combustion of agro-industrial wastes in power plant seems to be an attractive possibility for the future. In Spain, the food industry generates around 618,000 tonnes of rice husk annually.
A Bahíllo
exaly   +2 more sources

Effect of bed material on ammonia dissociation in a bubbling fluidised bed

International Journal of Hydrogen Energy
Jianbo Li, Dongke Zhang
exaly   +2 more sources

Bubbling Properties in Pulsed Fluidised Beds

2021
This chapter discusses the response of flow patterns and bubbling properties in a quasi-2D, pulsed, gas-solid bubbling fluidised bed to the variations in an oscillatory gas flow. The experimental results demonstrate that bubbling behaviour can be modified via modulated periodic flows.
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The distribution of bubbles in a gas fluidised bed

Chemical Engineering Science, 1970
Abstract based on the observed pattern of coalescence of bubble pairs in vertical alignment in a two-dimensional bed, a theory is developed which describes how bubble size and frequency changes with height in gas fluidised bed. It is confirmed by comparison with the reported data from 10 separate investigations which can together be described by ...
R. Matsuno, P.N. Rowe
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The expansion of bubbling fluidised beds

Powder Technology, 1968
Abstract The expansion of freely bubbling gas fluidised beds has been investigated experimentally in a 12-in. diameter bed and the influence of bed depth, gas velocity, particle size and particle-size distribution has been studied. Results are compared with theoretical predictions and new light is thrown on the assumptions inherent in the two-phase ...
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Mechanistic Prediction of Bubble Properties in Freely-Bubbling Fluidised Beds

1980
The approach developed by Nguyen et al.(1975) for predicting bubble behaviour in beds of Geldart’s (1973) Group B particles has been modified to enable application to beds of larger scale. The predictions are generally in agreement with the measurements of Werther (1974), but some discrepancy arises from non-uniform bubble formation caused by solids ...
Farrokhalaee, T, Clift, R
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The behaviour of freely bubbling fluidised beds

Chemical Engineering Science, 1969
Abstract This paper considers two aspects of the behaviour of freely bubbling fluidised beds: 1. The rising velocity of bubbles in a fluidised bed has been found to be greater for a swarm of bubbles than for a bubble in isolation. This appears to be caused primarily by the acceleration of overtaking bubbles during the coalescence process.
J.R. Grace, D. Harrison
openaire   +1 more source