An Optical Microreactor Enabling In Situ Spectroscopy Combined with Fast Gas-Liquid Mass Transfer

Sebastian Ponce, Hauke Christians, Alfons Drochner, Bastian J.M. Etzold

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

A liquid core waveguide membrane microreactor combining intense light matter interaction for in situ sensing and/or photo activation and excellent gas-liquid mass transfer is presented. Basis is a liquid-filled Teflon AF tube, which provides light transmission within the liquid core and gas permeation through the wall. The study shows that a wide spectral range (UV-vis) with relatively low optical losses is accessible. A working regime preventing gas bubble formation was deduced for semi-batch and in flow operation for gas pressures up to 8 bar. Residence time distribution experiments revealed Bodenstein numbers from 21 to 60 in the studied flow range. As example, the methylene blue catalyzed oxidation of D-glucose by O2 was studied at different pressures, while methylene blue was monitored in situ.

Original languageEnglish
Pages (from-to)1855-1863
Number of pages9
JournalChemie-Ingenieur-Technik
Volume90
Issue number11
DOIs
StatePublished - Nov 2018
Externally publishedYes

Keywords

  • Gas-liquid reactions
  • In situ spectroscopy
  • Optical microreactors
  • Teflon amorphous fluoropolymers
  • Tube-in-tube contactor

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