Two phase gas - liquid reaction studies in a circular capillary

Andreas Tsoligkas, Mark Simmons, Joseph Wood

Research output: Contribution to journalArticle

15 Citations (Scopus)


The hydrogenation of 4-nitrobenzoic acid to 4-aminobenzoic acid was studied in a circular capillary, wash coated with a Pd on alumina catalyst, operated in vertical two phase down flow. The influence of multiphase flow pattern (slug (Taylor) flow, annular, bubble and chum) upon the observed reaction rate was investigated; in slug flow the reaction rate was a function of the liquid slug and gas bubble lengths. Mass transfer models for the different flow patterns are proposed based on previous mass transfer coefficient models. (c) 2006 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)5397-5401
Number of pages5
JournalChemical Engineering Science
Issue number18-20
Publication statusPublished - 1 Jan 2007


  • capillary
  • multiphase flow
  • hydrodynamics
  • mass transfer


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