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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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doi:10.5194/amt-2016-395
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
17 Jan 2017
Review status
A revision of this discussion paper was accepted for the journal Atmospheric Measurement Techniques (AMT) and is expected to appear here in due course.
Dry particle generation with a 3D printed fluidized bed generator
Michael Roesch1, Carolin Roesch1, and Daniel J. Cziczo1,2 1Department of Earth, Atmospheric & Planetary Sciences, Massachusetts Institute of Technology, Cambridge, 02139, USA
2Department of Civil Environmental Engineering, Massachusetts Institute of Technology, Cambridge, 02139, USA
Abstract. Here we describe the design and testing of a compact fluidized bed aerosol generator named PRIZE (PRinted fluidIZed bed gEnerator) manufactured using stereolithography (SLA) printing. Dispersing small quantities of powdered materials – due either to rarity or expense – is challenging due to a lack of small, low-cost dry aerosol generators. With this as motivation, we designed and built a generator that uses a mineral dust or other dry powder sample mixed with bronze beads that sit atop a porous screen. A particle free airflow is introduced, dispersing the sample as airborne particles. Particle number concentration and size distributions were measured during different stages of the assembling process to show that the SLA 3D printed generator did not generate particles until the mineral dust sample was introduced. Time-series measurements with Arizona Test Dust (ATD) showed stable total particle number concentrations of 10–150 cm−3, depending on the sample mass, from the sub- to super-micrometer size range. PRIZE is simple to assemble, easy to clean, inexpensive and deployable for laboratory and field studies that require dry particle generation.

Citation: Roesch, M., Roesch, C., and Cziczo, D. J.: Dry particle generation with a 3D printed fluidized bed generator, Atmos. Meas. Tech. Discuss., doi:10.5194/amt-2016-395, in review, 2017.
Michael Roesch et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC1: 'Review of Roesch et al.', Anonymous Referee #1, 02 Feb 2017 Printer-friendly Version Supplement 
AC1: 'Reply to RC1', Michael Rösch, 28 Apr 2017 Printer-friendly Version Supplement 
 
RC2: 'Few comments', Anonymous Referee #2, 09 Mar 2017 Printer-friendly Version 
AC2: 'Reply to RC2', Michael Rösch, 28 Apr 2017 Printer-friendly Version Supplement 
Michael Roesch et al.
Michael Roesch et al.

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Short summary
This study describes the design, manufacture and proof-of-concept of a 3D printed fluidized bed generator (FBG) called PRIZE. The generator is capable of dispersing aerosol particles from dry material without itself generating significant particles (~ 5 % by number at 0.2 g of test dust). Using 3D printing technology makes this a low-cost instrument when compared to commercially available FBGs. PRIZE is simple to assemble, easy to clean, inexpensive and deployable for laboratory and field studies.
This study describes the design, manufacture and proof-of-concept of a 3D printed fluidized bed...
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