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Issue 9, 2016
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How imperfect mixing and differential diffusion accelerate the rate of nonlinear reactions in microfluidic channels

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Abstract

In this paper, we show experimentally that inside a microfluidic device, where the reactants are segregated, the reaction rate of an autocatalytic clock reaction is accelerated in comparison to the case where all the reactants are well mixed. We also find that, when mixing is enhanced inside the microfluidic device by introducing obstacles into the flow, the clock reaction becomes slower in comparison to the device where mixing is less efficient. Based on numerical simulations, we show that this effect can be explained by the interplay of nonlinear reaction kinetics (cubic autocatalysis) and differential diffusion, where the autocatalytic species diffuses slower than the substrate.

Graphical abstract: How imperfect mixing and differential diffusion accelerate the rate of nonlinear reactions in microfluidic channels

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Publication details

The article was received on 12 Jan 2016, accepted on 03 Feb 2016 and first published on 10 Feb 2016


Article type: Paper
DOI: 10.1039/C6CP00224B
Citation: Phys. Chem. Chem. Phys., 2016,18, 6451-6457
  • Open access: Creative Commons BY license
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    How imperfect mixing and differential diffusion accelerate the rate of nonlinear reactions in microfluidic channels

    R. Niedl, I. Berenstein and C. Beta, Phys. Chem. Chem. Phys., 2016, 18, 6451
    DOI: 10.1039/C6CP00224B

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