Applied Biochemistry and Biotecnology pp 859-873

Part of the ABAB Symposium book series (ABAB)

The Effects of Engineering Design on Heterogeneous Biocatalysis in Microchannels

  • Frank Jones
  • Robert Bailey
  • Stephanie Wilson
  • James Hiestand

Abstract

The results of a numerical study of the fundamental interactions of engineering design and micromixing on conversion in packed microchannels are presented. Previously, channel-based microreactors made of molded silicon plastic were designed, fabricated, and experimentally tested. These reactors have enzymes immobilized on the channel walls by various methods including layerby-layer nano self-assembly techniques. They also contain molded packing features to add reactive surface area and to redistribute the fluid. An arbitrary but intuitively sensible packing arrangement was initially chosen and used in experimental studies. The current computer simulation study was undertaken to understand how static laminar mixing affects the conversion efficiency. The reactors previously used experimentally have been simulated using CFD-ACE+ multiphysics software (ESI CFD Inc., Huntsville, AL). It is found that packing significantly increases conversion when compared with empty channels over the entire flow rate range of the study (0.25<Re<62.5). The boost in conversion has an optimal point near Re=20 for the particular geometry examined.

Index Entries

Catalase enzyme micromixing microreactor numerical simulation heterogeneous catalysis 

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Copyright information

© Humana Press Inc. 2007

Authors and Affiliations

  • Frank Jones
    • 1
  • Robert Bailey
    • 2
  • Stephanie Wilson
    • 1
  • James Hiestand
    • 1
  1. 1.University of Tennessee at ChattanoogaChattanooga
  2. 2.Loyola College in MarylandBaltimore

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