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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
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Published on: October 1, 2007

Efficient mixing and reactions within microfluidic channels using microbead-supported catalysts.

Gi Hun Seong1, Richard M Crooks

  • 1Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station 77842-3012, USA.

Journal of the American Chemical Society
|November 7, 2002
PubMed
Summary

Researchers developed a microfluidic system using catalyst-coated microbeads for efficient mixing and multistep reactions. This method enhances reaction speeds and offers potential for cell pathway modeling and biosensing.

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18:11

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12:42

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Published on: April 10, 2012

Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies
12:55

Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies

Published on: November 28, 2013

Area of Science:

  • Chemical Engineering
  • Biotechnology
  • Materials Science

Background:

  • Microfluidic systems offer precise control for chemical reactions but often face challenges in efficient mixing and catalyst integration.
  • Multistep catalytic reactions require effective management of sequential steps and catalyst accessibility.
  • Existing microreactor designs may limit reaction rates due to surface area and mixing limitations.

Purpose of the Study:

  • To present a novel strategy for efficient solution mixing and multistep catalytic reactions in microfluidic systems.
  • To improve reaction velocities and catalyst utilization within microreactors.
  • To demonstrate the versatility of the approach for chemical synthesis and biological applications.

Main Methods:

  • Immobilizing catalysts onto microbeads.
  • Integrating catalyst-modified microbeads into defined microreactor zones.
  • Passing reactant solutions through sequential microreactor zones for product formation.
  • Utilizing sequential reactions catalyzed by glucose oxidase and horseradish peroxidase for demonstration.

Main Results:

  • The catalyst-modified microbeads effectively mixed reactants, enhancing reaction velocities.
  • Increased effective surface area within the microreactor channels improved reaction efficiency compared to open channels.
  • Successful execution of two sequential catalytic reactions, demonstrating the system's capability.

Conclusions:

  • The microbead-based microreactor strategy provides an efficient method for chemical synthesis in microfluidic devices.
  • This approach offers a versatile platform for modeling cellular reaction pathways.
  • The design holds promise for advanced bio/chemical sensing applications.