Gkogkos, G;
Besenhard, MO;
Storozhuk, L;
Thi Kim Thanh, N;
Gavriilidis, A;
(2022)
Fouling-proof triple stream 3D flow focusing based reactor: Design and demonstration for iron oxide nanoparticle co-precipitation synthesis.
Chemical Engineering Science
, 251
, Article 117481. 10.1016/j.ces.2022.117481.
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Abstract
The primary limitation of millifluidic reactors used for (nano)particle synthesis is fouling, which is inherent to small channel devices. This work presents an approach for fouling-free particle production by utilising a novel millifluidic device to achieve a wall-free environment, where the particles are formed. The design was based on computational fluid dynamics (CFD) simulations and produced a 3-layer co-axial flow in two sequential flow focusing junctions. The device enabled the introduction of a separating stream that prevented premature reaction to avoid fouling at the confluence point. The flow focusing device was used for an iron oxide nanoparticle co-precipitation synthesis using tetraethylammonium hydroxide (TEAOH). For this synthesis, it was used to initiate particle formation, and was followed by a millifluidic capillary coil. Fouling resistance at the capillary coil was increased by using excess TEAOH. At elevated temperature (60 °C) the produced nanoparticles were of superior quality compared to room temperature operation.
| Type: | Article |
|---|---|
| Title: | Fouling-proof triple stream 3D flow focusing based reactor: Design and demonstration for iron oxide nanoparticle co-precipitation synthesis |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ces.2022.117481 |
| Publisher version: | https://doi.org/10.1016/j.ces.2022.117481 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Flow focusing, Fouling, Nanoparticles, CFD modelling |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10144084 |
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