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How imperfect mixing and differential diffusion accelerate the rate of nonlinear reactions in microfluidic channels
- 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.
Author details: | Robert Raimund NiedlGND, Igal Berenstein, Carsten BetaORCiDGND |
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DOI: | https://doi.org/10.1039/c6cp00224b |
ISSN: | 1463-9076 |
ISSN: | 1463-9084 |
Title of parent work (English): | Physical chemistry, chemical physics : PCCP ; a journal of European Chemical Societies |
Publisher: | Royal Society of Chemistry |
Place of publishing: | Cambridge |
Publication type: | Article |
Language: | English |
Date of first publication: | 2016/02/10 |
Publication year: | 2016 |
Publishing institution: | Universität Potsdam |
Release date: | 2016/09/15 |
Tag: | arsenious acid; fronts; paper; poly(dimethylsiloxane); scale; systems |
Volume: | 18 |
First page: | 6451 |
Last Page: | 6457 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Peer review: | Referiert |
Publishing method: | Open Access |
Grantor: | RSC |
License (English): | Creative Commons - Namensnennung 3.0 Unported |
External remark: | Zweitveröffentlichung in der Schriftenreihe Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe ; 253 |