Catalytic methane combustion in plate-type microreactors with different channel configurations: An experimental study

Li He, Yilin Fan, Jerome Bellettre, Jun Yue*, Lingai Luo

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

This paper presents an experimental study on the catalytic methane combustion (CMC) in plate-type microreactors with wall-coated Pt/γ-Al2O3 catalyst. Firstly, the influence of different operational conditions and coating properties on the CMC in the straight parallel-channel microreactor has been investigated. A specific catalyst loading of 57.6 g m−2 was found to yield the highest methane conversion over 3.5 wt% Pt/γ-Al2O3. A higher or lower loading tended to decrease the methane conversion due to either the limited internal diffusion through the thicker coating layer or insufficient active sites in the thinner coating layer. Then, the above microreactor was compared with other five different geometries, including cavity, double serpentine microchannels, obstacled microchannels, meshed circuit and vascular network. The double serpentine microchannel geometry presented the highest methane conversion (especially at a relatively low mixture flow rate) due to the appropriate control over the residence time and catalyst coating surface area.
Original languageEnglish
Article number116517
Number of pages17
JournalChemical Engineering Science
Volume236
Early online date14-Feb-2021
DOIs
Publication statusE-pub ahead of print - 14-Feb-2021

Keywords

  • Catalytic methane combustion
  • Microreactor
  • Washcoated catalyst
  • Channel configuration
  • Methane conversion
  • Flow distribution

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