Flow regime transitions in a bubble column with a paraffin wax as the liquid medium

Dragomir B. Bukur, Dragan Petrovic̀, James G. Daly

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Gas hold-up measurements were made in a 0.051-m-diameter by 3.05-m-long glass bubble column with a molten paraffin wax as the liquid medium. For temperatures between 230 and 280°C, there is a range of gas velocities where two modes of operation are possible, and they are referred to as the "foamy" and the "turbulent bubbling" flow regimes. The start-up velocity determines which flow regime will be obtained. Transitions between these two flow regimes occur and are influenced by the temperature (i.e., the liquid viscosity) and the gas distributor design. Lower temperatures and/or perforated plate distributors with larger holes favor the existence of the turbulent bubbling flow regime. Bach and Pilhofer's correlation provides a very good fit for gas holdups obtained in studies with orifice plate distributors in the absence of foam.

Original languageEnglish
Pages (from-to)1087-1092
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume26
Issue number6
Publication statusPublished - 1987
Externally publishedYes

Fingerprint

Paraffin waxes
Transition flow
Bubble columns
wax
bubble
Gases
liquid
Liquids
turbulent flow
gas
Turbulent flow
Perforated plates
Viscosity of liquids
Orifices
foam
Temperature
Foams
Molten materials
viscosity
glass

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

Cite this

Flow regime transitions in a bubble column with a paraffin wax as the liquid medium. / Bukur, Dragomir B.; Petrovic̀, Dragan; Daly, James G.

In: Industrial and Engineering Chemistry Research, Vol. 26, No. 6, 1987, p. 1087-1092.

Research output: Contribution to journalArticle

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