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Magnetic actuation of catalytic microparticles for the enhancement of mass transfer rate in a flow reactor
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Lisk, Philip, Bonnot, Erell, Rahman, Md Taifur, Pollard, Robert, Bowman, Robert, Degirmenci, Volkan and Rebrov, Evgeny V. (2016) Magnetic actuation of catalytic microparticles for the enhancement of mass transfer rate in a flow reactor. Chemical Engineering Journal, 306 . pp. 352-361. doi:10.1016/j.cej.2016.07.059 ISSN 1385-8947.
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Official URL: http://dx.doi.org/10.1016/j.cej.2016.07.059
Abstract
The effect of periodic changes in particle velocity on mass transfer to the reacting surface of a magnetic particle with a diameter 225 μm in laminar flow has been investigated in a microfluidic reactor. The periodic particle motion in a fluid was investigated under a sinusoidal magnetic field generated by a quadrupole arrangement of electromagnets around the reactor. The effect of operating frequency of the rotating magnetic field, intensity of the magnetic field, and phase shift between the two sets of magnets on particle dynamics has been studied. Three particle motion modes have been observed depending on the frequency of the applied field. The mass transfer rate was estimated under steady velocity and variable velocity of the particle using a mass transfer correlation by Feng and Michaelides (2001). The validity of this correlation for the case of variable particle velocity has been confirmed with a 2D numerical model, describing actual hydrodynamics and mass transfer towards the particle surface. The mass transfer coefficient depends both on the mean particle velocity and the deviation of velocity from the mean value. The periodic movement with variable particle velocity reduces the mass transfer coefficient by 7.6% as compared to steady state motion with the same mean velocity.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TP Chemical technology | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Library of Congress Subject Headings (LCSH): | Microreactors , Mass transfer | ||||||||
Journal or Publication Title: | Chemical Engineering Journal | ||||||||
Publisher: | Elsevier BV | ||||||||
ISSN: | 1385-8947 | ||||||||
Official Date: | 15 December 2016 | ||||||||
Dates: |
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Volume: | 306 | ||||||||
Page Range: | pp. 352-361 | ||||||||
DOI: | 10.1016/j.cej.2016.07.059 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 28 September 2016 | ||||||||
Date of first compliant Open Access: | 29 September 2016 | ||||||||
Funder: | European Research Council (ERC), Rossiĭskiĭ nauchnyĭ fond | ||||||||
Grant number: | Project 279867 (ERC), Project 15-13-20015 | ||||||||
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