Transient phenomena in fluidized beds when switching the fluidizing agent from one gas to another

K. Rietema, J. Hoebink

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

The free-bubbling behaviour of a bed, fluidized with hydrogen, stops temporarily when the hydrogen flow is changed suddenly to an equal volumetric flow of nitrogen; large conglomerates of particles form and channelling occurs. Changing the gas flow in opposite direction causes no disturbance at all. This phenomenon has been studied experimentally with different gases. It is explained how the intensity of the phenomenon depends on both the viscosities and the molecular weights of the gases used.

Original languageEnglish
Pages (from-to)257-265
Number of pages9
JournalPowder Technology
Volume18
Issue number2
DOIs
Publication statusPublished - 1 Jan 1977

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