𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The division of gas between bubble and interstitial phases in fluidised beds of fine powders

✍ Scribed by P.N. Rowe; L. Santoro; J.G. Yates

Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
754 KB
Volume
33
Category
Article
ISSN
0009-2509

No coin nor oath required. For personal study only.

✦ Synopsis

The chvlslon of gas flow between the two phases of a flmdlsed bed of commercial catalyst powder has been determmed from measurements of mterstltlal phase vokdage and bed height over a wide range of gas velocltles Voldage measurements were made by comparing the X-ray absorption of the mterstltial phase of the freely bubbhng catalyst with that of a cahbratlon wedge Lontammg the same material X-Ray photography was also used m the measurement of bed height Three batches of catalyst powder contammg different amounts of 'fines' were exammed The results clearly demonstrate that mcreasmg the fines content of a fluuiised powder leads to an Increase m the relative proportion of gas flowing rnterstltlally at all tlurd vetocitIes Furthermore the mterstltial gas Bow IS shown to be up to 25 times greater than the muumum Ruldisatlon value for the powder contauung the highest proportion of fines The lmphcatlons of ttus for the two phase theory of flutdlsatlon and for the design and operation of Atuchsed bed reactors IS dIscussed

πŸ“œ SIMILAR VOLUMES

Comments on β€œthe division of gas between
Comments on β€œthe division of gas between bubble and interstitial phases in fluidized beds of fine powders” by Rowe, Santoro and Yates
✍ D. Geldart πŸ“‚ Article πŸ“… 1979 πŸ› Elsevier Science 🌐 English βš– 124 KB

In a recent paper Rowe et al [ 11 present data on the voldage of the dense phase m a bubblmg flm&zed bed of catalyst powder They find that as the superlicud gas velocity 1s mcreased between 1 and 20 cm/s the voldage of the dense phase at first falls rapldly and then gradually mcreases They also draw

Dense phase expansion in fluidised beds
Dense phase expansion in fluidised beds of fine particles: The effect of pressure on bubble stability
✍ J.R.F.Guedes de Carvalho πŸ“‚ Article πŸ“… 1981 πŸ› Elsevier Science 🌐 English βš– 443 KB

## AbstrW -An experimental study is described of Ihe behaviour of Synclyst particles (do, = 48pm) fluidised by air in a 0.05 m i.d. column; pressures in the range 1-22 bar were used. The expansion of the dense phase during bubbling is compared with maximum bed expansion before bubbling. The data a

The measurement of emulsion phase voidag
The measurement of emulsion phase voidage in gas fluidized beds of fine powders
✍ G.F. Barreto; J.G. Yates; P.N. Rowe πŸ“‚ Article πŸ“… 1983 πŸ› Elsevier Science 🌐 English βš– 457 KB

Abstracts The results of two different experimental methods, X-ray absorption and bed collapse, for the determination of the emulsion-phase voidage of gas fluid&d beds are compared. It is shown that good agreement exists between them over the range of gas velocities studied, but that possible differ